Wyniki wyszukiwania - BazTech

1

Nonlinear vibration of multi-walled carbon nanotubes with initial curvature resting on elastic foundations in a nonlinear thermo-magnetic environment

Sobamowo Gbeminiyi, Akanum James, Adeleye Olurotimi, Akingbade Samuel, Yinusa Ahmed

Engineering Transactions

|

2021

|

Vol. 69, iss. 2

87--165

EN

The present work focuses on nonlinear dynamics models of multi-walled carbon nanotubes with initial curvature resting on Winkler-Pasternak elastic foundations in a nonlinear thermomagnetic environment using nonlocal elasticity theory. The derived systems of nonlinear vibration models are solved with the aid of the Galerkin decomposition and the homotopy perturbation method. Effects of temperature, magnetic field, multi-layer, and other thermomechanical parameters on the dynamic responses of the slightly curved multi-walled carbon nanotubes are investigated and discussed. As the temperature increases, the frequency ratio decreases as the linear natural frequency of the system increases. The results reveal that the frequency ratios decrease as the number of nanotube walls, temperature, spring constants, magnetic field strength, and the ratio of the radius of curvature to the length of the slightly curved nanotubes increase. These trends are the same for all the boundary conditions considered. However, clamped-simple and clamped-clamped supported multi-walled nanotube have the highest and lowest frequency ratio, respectively. Also, from the parametric studies to control nonlinear vibration of the carbon nanotubes, it is shown that quadruple-walled carbon nanotubes can be taken as pure linear vibration even at any value of linear Winkler and Pasternak constants. Therefore, this can be used for the restraining of the chaos vibration in the objective structure. These research findings will assist the designers and manufacturers in developing multi-walled carbon nanotubes for various structural, electrical, mechanical, and biological applications, especially in the areas of designing nanoelectronics, nanodevices, nanomechanical systems, nanobiological devices, and nanocomposites, and particularly when they are subjected to thermal loads, magnetic fields and elastic foundations.

2

Tuning the Laser Ignition Properties of Nitrocellulose-Nitroglycerine-Hexogen Propellants via Incorporation of Carbon Nanotubes

Shi Xianrui, Jia Yongjie, Chen Linyu, Tian Lu, Shen Jinpeng, Pei Chonghua

Central European Journal of Energetic Materials

|

2021

|

Vol. 18, no. 3

385--404

EN

Near infrared laser ignition is challenging owing to the poor near infrared laser absorption of nitrocellulose-nitroglycerine-hexogen (NC-NG-RDX) propellants. Less than 1 wt.% of carbon nanotubes (CNTs) were uniformly dispersed into the NC-NG-RDX propellants to tune its near infrared laser ignition property. The effects of CNTs on the thermal decomposition, near infrared light absorption and thermal conductivity of NC-NG-RDX propellants were studied. The near infrared laser ignition property of NC-NG-RDX propellants doped with CNTs were investigated compared with raw NC-NG-RDX propellant. The decomposition property and thermal conductivity of NC-NG-RDX propellants doped with CNTs were little changed due to the small quantity of CNTs. The laser reflectivity of the composite propellants decreased obviously as the content of CNTs was increased because of the high laser absorption property of CNTs. The laser ignition performance of the composites propellants is substantially improved by the incorporation of 0.5 wt.% or less CNTs and the successful ignition time decreases remarkably. Higher CNT content, such as 0.75 wt.% can lead to failure of laser ignition due to the excessive laser absorption efficiency and heating rate of the radiated region of the composite propellants together with inefficient deflagration. Our research reveals that the appropriate proportion of CNTs can potentially be used as a laser sensitizer for realizing effective infrared laser ignition of NC-NG-RDX propellants.

3

Effect of different sized multi walled carbon nanotubes on the barrier potential and trap concentration of malachite green dye based organic device

Sen Sudipta, Manik N. B.

Advances in Materials Science

|

2020

|

Vol. 20, nr 4(66)

16--26

EN

Present work shows effect of 8 nm diameter and 30 nm diameter multi walled carbon nanotubes (MWCNT) on the barrier potential and trap concentration of Malachite Green (MG) dye based organic device. MWCNTs are basically a bundle of concentric single-walled carbon nanotubes with different diameters. In this work, ITO coated glass substrate and aluminium have been used as front electrode and back electrode respectively and the spin coating method is used to prepare the MG dye based organic device. It has been observed that both barrier potential and trap concentration are in correlation. Estimation of both these parameters has been done from current-voltage characteristics of the device to estimate the trap energy and the barrier potential of the device. Device turn-on voltage or the transition voltage is also calculated by using current-voltage characteristics. In presence of 8 nm diameter MWCNT, the transition voltage is reduced from 3.9 V to 2.37 V, the barrier potential is lowered to 0.97 eV from 1.12 eV and the trap energy is lowered to 0.028 eV from 0.046 eV whereas incorporation of 30 nm diameter MWCNT shows reduction of transition voltage from 3.9 V to 2.71 V and a reduction of barrier potential and trap concentration from 1.12 eV to 1.03 eV and from 0.046 eV to 0.035 eV respectively. Presence of both 8 nm diameter and 30 nm diameter MWCNT lowers trap energy approximately to 39% and 24% respectively and lowers barrier potential approximately to 13% and 8% respectively. Estimation of barrier potential is also done by Norde method which shows lowering of the value from 0.88 eV to 0.79 eV and from 0.88 eV to 0.84 eV in presence of both 8 nm and 30 nm diameter multi walled carbon nanotubes respectively. Calculation of barrier potential from both the I-V characteristics and Norde method are in unison with each other. Indication of enhancement of charge flow in the device can be ascribed to the truncated values of barrier potential and trap energy.

4

2D-Raman correlation spectroscopy as a method to recognize of the interaction at the interface of carbon layer and albumin

Kołodziej A., Wesełucha-Birczyńska Aleksandra, Moskal Paulina, Stodolak-Zych Ewa, Dużyja Maria, Długoń Elżbieta, Sacharz Julia, Błażewicz Marta

Journal of Automation Mobile Robotics and Intelligent Systems

|

2019

|

Vol. 13, No. 3

74--83

EN

In modern nanomaterial production, including those for medical purposes, carbon based materials are important, due to their inert nature and interesting properties. The essential attribute for biomaterials is their biocompatibility, which indicates way of interactions with host cells and body fluids. The aim of our work was to analyze two types of model carbon layers differing primarily in topography, and developing their interactions with blood plasma proteins. The first layer was formed of pyrolytic carbon C (CVD) and the second was constructed of multi-walled carbon nanotubes obtained by electrophoretic deposition (EPD), both set on a Ti support. The performed complex studies of carbon layers demonstrate significant dissimilarities regarding their interaction with chosen blood proteins, and points to the differences related to the origin of a protein: whether it is animal or human. However the basic examinations, such as: wettability test and nano sctatch tests were not sufficient to explain the material properties. In contrast, Raman microspectroscopy thoroughly decodes the phenomena occurring at the carbon structures in contact with the selected blood proteins. The 2D correlation method selects the most intense interaction and points out the different mechanism of interactions of proteins with the nanocarbon surfaces and differentiation due to the nature of the protein and its source: animal or human. The 2D correlation of the Raman spectra of the MWCNT layer+HSA interphase proves an increase in albumin β-conformation. The presented results explain the unique properties of the Clayers (CVD) in contact with human albumin.

5

Influence of environmental media on carbon nanotubes and graphene nanoplatelets towards bacterial toxicity

Baysal A., Saygin H., Ustabasi G. S.

Archives of Environmental Protection

|

2018

|

Vol. 44, no. 3

85--98

EN

Functional carbon-based nanomaterials have become important due to their unique combinations of chemical and physical properties, and also because of the increasing research efforts in various fi elds. A signifi cant gap in nanotechnology is the disregarding of physicochemical transformation under real conditions for the examination and comparison on the effect of carbon based nanomaterials. In this study, the behavior of some carbon based nanomaterials (multi-walled carbon nanotubes and graphene nanoplatelets) in environmental media (sea water, soil, and airborne fi ne particulate) were evaluated by using the infl uence on nanomaterial physicochemical properties (size, zeta potential, surface chemistry, morphology and sedimentation) and on the toxicity of bacterium (gram positive and gram negative bacteria) to contribute to their environmental hazard and risk assessment on the environment. The bacteria were exposed to the carbon based nanomaterials, and cultivated on nutrient agar plates including each environmental media, and then counted for the colony forming units. The physicochemical properties of the carbon based nanomaterials dispersed in these environmental media were also investigated. Our results indicated that the toxicity depended on the type of environmental media and their concentration, and the physicochemical properties of the carbon based nanomaterials changed when compared to the results obtained in controlled conditions.

6

Preparation and electrical properties of polyimide/carbon nanotubes composites

Kareem A. A.

Materials Science Poland

|

2017

|

Vol. 35, No. 4

755--759

EN

Polyimide/MWCNTs nanocomposites have been fabricated by solution mixing process. In the present study, we have investigated electrical conductivity and dielectric properties of PI/MWCNT nanocomposites in frequency range of 1 kHz to 100 kHz at different MWCNTs concentrations from 0 wt.% to 15 wt.%. It has been observed that the electrical conductivity and dielectric constants are enhanced significantly by several orders of magnitude up to 15 wt.% of MWCNTs content. The electrical conductivity increases as the frequency is increased, which can be attributed to high dislocation density near the interface. The rapid increase in the dielectric constant at a high MWCNTs content can be explained by the formation of a percolative path of the conducting network through the sample for a concentration corresponding to the percolation threshold. The high dielectric constant at a low frequency (1 kHz) is thought to originate from the space charge polarization mechanism. I-V characteristics of these devices indicate a significant increase in current with an increase in multi-walled carbon nanotube concentration in the composites. The SEM images show improved dispersion of MWCNTs in the PI matrix; this is due to the strong interfacial interactions.

7

Zastosowanie nanorurek węglowych w nanoelektronice i materiałach akumulujących energię

Pyzalska M., Zdanowska S., Kulawik D., Holi A., Żurkowska A., Serdiuk K., Ożarowski M., Ciesielski W., Drabowicz J.

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa

|

2016

|

T. 4

367--376

PL

Zainteresowanie, jakie narasta wokół wielościennych nanorurek węglowych (MWCNT), jest głównie związana z ich unikatowymi właściwościami. Nanometryczne wielkości, duża odporność termiczna i mechaniczna, powodują, że nanorurki węglowe są coraz częstszym przedmiotem badań pod kątem alternatywnych źródeł energii. Zasługują one również na uwagę ze względu na swoje właściwości elektronowe (nie pomijając właściwości fizycznych). Zestawienie takich właściwości MWCNT daje możliwość wykorzystywania ich jako materiałów w nanoelektronice, do konstrukcji maksymalnie zminiaturyzowanych urządzeń, m. in. w tranzystorów (FED), chemicznych sensorów, przełączników czy oscylatorów. Obecnie stosowane natywne CNT wykorzystuje się jako dodatek do stopów.

EN

The increasing interest around multi-walled carbon nanotubes (MWCNT) is mainly associated with their unique properties. Nanometirc size and high thermal and mechanical resistance caused that carbon nanotubes are becoming more frequent subject of research which are a part of studies aimed for alternative energy sources. They deserve attention due to their electronic properties (beside their unique physical proper-ties). Thanks to such properties MWCNT may be used as materials for nanoelectronics including construction of devices that should be miniaturized as much as possible eg. a (FED) transistor, chemical sensors, switches or oscillators. At present, the native carbon nanotubes are applied for such purposes in addition to the alloys.

8

The influence of different types of carbon nanomaterial on the properties of coatings obtained by EPD process

Wedel-Grzenda A., Tran K., Frączek-Szczypta A.

Engineering of Biomaterials

|

2016

|

Vol. 19, no. 135

13--20

EN

The first part of research is concentrated on the examination of four kinds of carbon nanomaterials: graphene oxide (GO), multi-walled carbon nanotubes (MWCNT), multi-walled carbon nanotubes functionalized by authors in acids mixture (MWCNT-F) and multi-walled carbon nanotubes with hydroxyl groups (MWCNT-OH). Their microstructure was observed in transmission electron microscopy (TEM). Based on these microphotographs, the diameters of carbon nanotubes were measured. Then, in order to determine the chemical composition of GO, MWCNT-F and MWCNT-OH, X-ray photoelectron spectroscopy was applied. The second part of study concerns the properties of the coatings deposited electrophoretically on titanium surface from previously examined nanomaterials. The coatings from individual nanomaterials, as well as hybrid layers (combination of two kinds of nanomaterial: graphene oxide with one of the nanotubes’ type) were deposited. Microstructure of the coatings was evaluated with the use of scanning electron microscopy (SEM). Furthermore, surface properties, important while considering usage of these materials in biological applications: wettability and surface free energy were evaluated. These materials are meant for application in regeneration and stimulation of nerve cells. All the research carried out so far indicate the influence of nanotubes’ functionalization degree on the properties of their suspension, as well as the characteristics of the deposited coating. It also influences the interaction between two types of nanomaterials. Functionalization in strong acids introduces functional groups which change nanotubes’ dimensions, properties and behavior in solution.

9

Badania kalorymetryczne PA6 oraz kompozytów PA6/wielościenne nanorurki węglowe

Brzozowska-Stanuch A., Rabiej S., Maślanka M.

Przetwórstwo Tworzyw

|

2015

|

T. 21, Nr 1 (163)

4--9

PL

W przedstawionym artykule badano wpływ temperatury i promieniowania UV na strukturę poliamidu 6 oraz jego nanokompozytów z wielościennymi nanorurkami węglowymi. Kompozyty PA6 z MWNT otrzymano przez mieszanie w stopie nanorurek węglowych osadzonych na nośniku polimerowym w postaci masterbacza z bazowym PA6 a następnie badano ich krystalizacje i proces topnienia. Wyniki różnicowej kalorymetrii skaningowej (DSC), pokazują dwa piki egzotermiczne krystalizacji w przypadku nanokompozytów PA6/MWNT podczas gdy, dla matrycy PA6 obserwuje się pojedynczy, egzotermiczny pik. Próbki zawierające wielościenne nanorurki węglowe charakteryzowały się ponadto wyższym stopniem krystaliczności i brakiem widocznego na krzywych DSC przegięcia egzotermy topnienia, wskazującej na obecność mniej stabilnej termicznie fazy γ, wyraźnej na krzywych PA6.

EN

In the paper, the effect of UV radiation and temperature on the structure of nylon 6 and it's nanocomposites with multi-walled carbon nanotubes was shown. PA6 composites prepared by a simple melt-compounding of multi-walled carbon nanotubes in a polymer supported as the master batch with the base of PA6 and then their crystallization and melting behavior were studied. Differential scanning calorimetry (DSC), indicate the presence of two exothermic crystallization peaks in the case of PA6/MWNT nanocomposites while, in the case of the PA6 matrix, a single exothermic peak was observed. Samples containing multi-walled carbon nanotubes were also characterized by a higher degree of crystallinity and the lack of visible DSC curves inflection of the exotherm point, indicating the presence of the less thermally stable γ phase, which was clearly visible on PA6 curves.

10

Study of Structure of Polypropylene Microfibres Modified with Multi-Walled Carbon Nanotubes

Fabia J., Janicki J., Ślusarczyk C., Rom M., Graczyk T., Gawłowski A.

Fibres & Textiles in Eastern Europe

|

2015

|

Vol. 23, no. 3 (111)

38--44

EN

The paper presented is concerned with studies of a supermolecular structure and its transformation during the process of drawing new composite microfibres obtained from isotactic polypropylene (iPP) – as a matrix and multi-walled carbon nanotubes (MWCNT) used as the filler. The nanostructure of iPP/MWCNT microfibres as spun and after drawing at a temperature of 95°C was investigated using scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS), small angle X-ray scattering (SAXS) and differential scanning calorimetry (DSC) methods.

PL

Prezentowana praca poświęcona jest badaniom ukształtowania struktury nadcząsteczkowej oraz jej transformacji zachodzącej w procesie rozciągania nowych mikrowłókien kompozytowych wytworzonych z izotaktycznego polipropylenu (iPP) jako matrycy oraz wielościennych nanorurek węglowych (MWCNT), użytych w charakterze napełniacza. Włókna (zawartość MWCNT 0,2%) w skali laboratoryjnej otrzymano metodą stopową w szerokim zakresie prędkości formowania (do 460,6 m/min). Mikrowłókna iPP/MWCNT bezpośrednio po procesie formowania oraz po rozciąganiu w temperaturze 95 °C poddano standardowym badaniom mechanicznym oraz wieloaspektowym badaniom strukturalnym z wykorzystaniem: skaningowej mikroskopiii elektronowej (SEM), dyfraktometrii rentgenowskiej w zakresie szerokokątowym (WAXS) i małokątowym (SAXS) oraz różnicowej kalorymetrii skaningowej (DSC).

11

Preparation and properties of polyurethane/functionalized multi-walled carbon nanotubes rigid foam nanocomposites

Nikje M. M. A., Yaghoubi A.

Polimery

|

2014

|

T. 59, nr 11-12

776--782

EN

Surface modification of hydroxylated, multi-walled carbon nanotubes (OH-MWCNTs) was carried out by silanization with 3-aminopropyltriethoxysilane (APTS). Rigid polyurethane foam nanocomposites were prepared by silanized MWCNTs in different weight percents via a one shot method and the thermal, mechanical and morphological properties of the nanocomposites were investigated in detail. The obtained results from thermogravimetric analysis indicated that the thermal stability of the nanocomposites were increased by higher silanized MWCNTs contents. Morphological studies showed an increased cell density parallel to higher silanized MWCNTs contents in the polyurethane matrix. Furthermore, the tensile properties showed that the Young's moduli, as well as tensile strengths, were improved in comparison with pristine foam. The obtained data revealed reverse effects of 3 % functionalized MWCNT on the properties of respective nanocomposites due to agglomeration of MWCNTs.

PL

Przeprowadzono funkcjonalizację hydroksylowanych wielościennych nanorurek węglowych (OH-MWCNTs) w procesie silanizowania za pomocą 3-aminopropylotrietoksysilanu (APTS). Nanokompozyty sztywnych pianek poliuretanowych wytwarzano przy użyciu różnej ilości silanizowanych MWCNTs (1,5, 2,0, 3,0 % mas.). Badano termiczne i mechaniczne właściwości uzyskanych pianek nanokompozytowych, a także ich morfologię. Wyniki otrzymane metodą analizy termograwimetrycznej wskazują, że stabilność termiczna kompozytów zwiększa się wraz ze wzrostem zawartości silanizowanych wielościennych nanorurek węglowych (Si-MWCNTs). Zwiększenie udziału zastosowanego napełniacza w matrycy poliuretanowej wpływa także na wzrost gęstości komórkowej pianki. Stwierdzono również poprawę modułu Younga oraz wytrzymałości przy rozciąganiu otrzymanych nanokompozytów. Dodatek do matrycy poliuretanowej już 3,0 % mas. silanizowanych wielościennych nanorurek węglowych powoduje pogorszenie omawianych właściwości nanokompozytów PUR/Si-MWCNTs, wynikające z obecności w matrycy poliuretanowej aglomeratów cząstek napełniacza.

12

Optimization of growth temperature of multi-walled carbon nanotubes fabricated by chemical vapour deposition and their application for arsenic removal

Mageswari S, Kalaiselvan S, Syed Shabudeen P S, Sivakumar N, Karthikeyan S

Materials Science Poland

|

2014

|

Vol. 32, No. 4

709--718

EN

Multi-walled carbon nanotubes have been synthesized at different temperatures ranging from 550 ◦C to 750 ◦C on silica supported Fe–Mo catalyst by chemical vapour deposition technique using Cymbopogen flexuous oil under nitrogen atmosphere. The as-grown MWNTs were characterized by scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM), X-ray diffraction analysis (XRD) and Raman spectral studies. The HRTEM and Raman spectroscopic studies confirmed the evolution of MWNTs with the outer diameter between 20 and 40 nm. The possibility of using as-grown MWNTs as an adsorbent for removal of As (V) ions from drinking water was studied. Adsorption isotherm data were interpreted by the Langmuir and Freundlich equations. Kinetic data were studied using Elovich, pseudo-first order and pseudo-second order equations in order to elucidate the reaction mechanism.

13

Effect of carbon nanotubes content on morphology and properties of AlMg1SiCu matrix composite powders

Dobrzański L., Macek M., Tomiczek B.

Archives of Materials Science and Engineering

|

2014

|

Vol. 69, nr 1

12--18

EN

Purpose: The main purpose of this work is to determine morphology, as well as technological and mechanical properties of aluminium matrix powder reinforced with multi-walled carbon nanotubes (MWCNTs) using powder metallurgy techniques. Dispersion of the multi-walled carbon nanotubes was achieved by using mechanical milling in a high energy ball mill. The addition of MWCNTs cause significant improvement in mechanical properties of Al/MWCNTs nanocomposites what is confirmed with more than a threefold increase in the hardness of composite powders, as compared to this value before milling. Design/methodology/approach: The main problem of the study is the agglomeration and poor distribution of carbon nanotubes in the matrix material. In order to achieve uniform dispersion of carbon nanotubes in aluminium alloy matrix mechanical milling was used. Additional problem is possible formation of the brittle aluminium carbides in the result of reaction between carbon nanotubes and aluminium particles. Findings: On the basis of micro-hardness testing has found that a small addition of carbon nanotubes in an amount of 0.5% by volume increases composites hardness by 13%, while the addition of carbon nanotubes in an amount of 5% by volume results in an increase of 37%.Practical implications: Composite powders carbon nanotubes were prepared using powder metallurgy method which shows the practical implications in manufacturing of nanocomposites. Originality/value: The investigation results shows that the technology of composite materials manufacturing can find the practical application in the production of new light metal matrix composites. It was found that carbon nanotubes, used as reinforcing phase, have influence on the properties of metal matrix composites.

14

CVD synthesis of MWCNTs using Fe catalyst

Dobrzańska-Danikiewicz A. D., Pawlyta M., Łukowiec D., Cichocki D., Wolany W.

Archives of Materials Science and Engineering

|

2014

|

Vol. 65, nr 2

58--65

EN

Purpose: The primary aim of the article is to present the method of chemical vapour deposition (CVD) employed for fabrication of multi-walled carbon nanotubes in the presence of a catalyst. The basic growth mechanisms of carbon nanotubes are described and the nanostructural carbon materials are presented and characterised, obtained using the CVD method and an Fe catalyst deposited on a silicon substrate. Design/methodology/approach: Scanning and transmission electron microscopy was applied for illustrating the structure and morphology of the synthesised multi-walled carbon nanotubes. Findings: The microscopic examinations conducted with scanning electron microscopy and high-resolution transmission electron microscopy have confirmed the achievement of an ordered layer of multi-walled carbon nanotubes on a silicon substrate containing an Fe catalyst. Practical implications: Carbon nanotubes, due to their unique properties, can be applied in various fields of technology, especially in medicine, optics, photovoltaics and electronic engineering. CNTs are also utilised as an active layer of chemical and biochemical sensors, especially when their outer surface is decorated with nanoparticles of precious metals. Carbon nanotubes are also used as a reinforcing phase in nanocomposite materials. Originality/value: The characterisation of the chemical vapour deposition method used for synthesis of multi-walled nanotubes with a metallic catalyst with application of the EasyTube® 2000 device by FirstNano.

15

Fabrication of MWNTs-PANI composite - a chemiresistive sensor material for the detection of explosive gases

Yuan C. L., Chang C. P., Hong Y. S., Sung Y.

Materials Science Poland

|

2009

|

Vol. 27, No. 2

509--520

EN

A chemiresistive sensor was fabricated by the chemical modification of multi-walled carbon nanotubes (MWNTs) and chemical oxidation of polyaniline (PANI). The resistances of the sensing film samples against 100, 250, 500, 1000 ppm explosives (picric acid (PA), 2,6-dinitrotoluene (2,6-DNT) and 2,4,6-trinitrotoluene(TNT)) agents were investigated. The MWNTs with various wt. % PANI agents were characterized by TGA, SEM, FTIR and Raman spectroscopy, respectively. The experimental results showed that 1wt. % MWNTs and 10, 5, 1wt. % PANI sensor samples provided high sensitivity, excellent selectivity and good reproducibility to PA and 2,6-DNT vapours. In addition, principal component analysis (PCA) was applied to distinguish the performance of PA, 2,6-DNT and TNT agents. Our results indicate that the electric detection of explosive agents is possible with simply fabricated MWNTs-PANI devices.

16

Influence of Multi-Walled Carbon Nanotubes(MWCNTs) On Yiability Of Paecilomyces fumosoroseusłWise) Brown & Smith (Deuteromycotina: hyphomycetes) Fungus Spore

Gorczyca A., Kasprowicz M., Lemek T., Jaworska M.

Ecological Chemistry and Engineering. A

|

2009

|

Vol. 16, nr 7

765-770

EN

The study aimed at testing the influence of pristine multi-walled carbon (MWCNTs) and carboxyl (MWCNT(COOH)) nanotubes on spores of entomopathogenic Paecilomyces fumosoroseus fungus. The effect of the nanotubes on the fungus linear growth, biomass increment and sporulation was determined. The character of linear growth of P. fumosoroseus mycelium obtained from the spores contacted with MWCNTs was difterent in comparison with the control. Pristine carbon nanotubes significantly stimulated P. fumosoroseus mycelium linear growth and limited its sporulation in comparison with the control. Carboxylation changed the influence of carbon nanotubes on the spores of the tested fungus. The activity of MWCNT(COOH) was definitely weaker and the obtained linear growth and sporulation did not differ significantly from the control. No apparent effect of MWCNTs on the increment of P. fumosoroseus biomass was found.

PL

Zbadano wpływ wielościennych nanorurek węglowych surowych (MWCNTs) i karboksylowanych (MWCNT(COOH)) na zarodniki owadobójczego grzyba Paecilomyces fumosoroseus. Określono wpływ nanorurek na wzrost liniowy grzyba, przyrost biomasy i zarodnikowanie. Charakter wzrostu liniowego grzybni P. fumosoroseus uzyskanego z zarodników kontaktowanych z MWCNTs w porównaniu do kontroli był inny. Nanorurki węglowe surowe powodowały znaczną stymulację wzrostu powierzchniowego grzybni P. fumosoroseus i ograniczenie jej zarodnikowania w porównaniu do kontroli. Karboksylacja zmieniła wpływ nanorurek węglowych na zarodniki badanego grzyba. Oddziaływanie MWCNT(COOH) było zdecydowanie słabsze, a uzyskany wzrost liniowy i zarodnikowanie nie różniły się istotnie od kontroli. Nie stwierdzono istotnego wpływu MWCNTs na przyrost biomasy grzyba P. fumosoroseus.