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László Forró

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Related publications (298)

Photocurrent generated by photosynthetic reaction centers/carbon nanotube/ITO bio-nanocomposite

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Springer2013

Carbon nanotube as functional matrix for bacterial photosynthetic reaction centers

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Springer2013

Reinforcement of CVD grown multi-walled carbon nanotubes by high temperature annealing

László Forró, Arnaud Magrez, Rita Smajda, Massimo Spina

We report on the increase of the Young's modulus (E) of chemical vapor deposition (CVD) grown multi-walled carbon nanotubes (MWNTs) upon high temperature heat treatment. The post heat-treatment at 2200-2800 degrees C in a controlled atmosphere results in a ...

Amer Inst Physics2013

Observation of conduction electron spin resonance in boron-doped diamond

László Forró, Bálint Náfrádi, Péter Szirmai, Ferenc Simon

We observe the electron spin resonance of conduction electrons in boron-doped (6400 ppm) superconducting diamond (T-c = 3.8 K). We clearly identify the benchmarks of conduction electron spin resonance (CESR): the nearly temperature independent electron spi ...

Amer Physical Soc2013

Tuning the length dispersion of multi-walled carbon nanotubes by ball milling

László Forró, Claudio Grimaldi, Richard Gaal, Arnaud Magrez, Marijana Mionic Ebersold, Rita Smajda, Primoz Rebernik Ribic

The statistical analysis of the length distribution of catalytic chemical vapour deposition synthesized multi-walled carbon nanotubes cut by planetary ball milling is reported. The nanotube lengths follow a log-normal distribution in a broad range of grind ...

Amer Inst Physics2013

From nanotubes to single crystals: Co doped TiO2

Helmuth Berger, László Forró, Richard Gaal, Arnaud Magrez, Bálint Náfrádi, Neda Nikseresht Ghanepour, Jacim Jacimovic, Endre Horvath

Millimeter-sized cobalt doped rutile crystals with a bi-pyramidal shape are obtained by chemical vapour transport using scroll-type H2Ti3O7 nanotubes as a precursor in which Co2+ ions are introduced by a simple ion exchange method prior to the growth. Desp ...

Amer Inst Physics2013

Direct growth of nanotubes and graphene nanoflowers on electrochemical platinum electrodes

László Forró, Arnaud Magrez, Giovanni De Micheli, Sandro Carrara, Irene Taurino, Federico Matteini

Multi-walled carbon nanotubes and graphene nanoflowers were grown by a catalytic chemical vapor deposition process on metal surfaces. Electrodeposition was used as a versatile technique to obtain three different iron catalyst coatings on platinum microelec ...

2013

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

László Forró, Richard Gaal, Sergiy Katrych, Janusz Andrzej Karpinski, Andrea Pisoni

We report crystal growth at high pressure, structure determination, and magnetic and transport studies of an oxypnictide superconductor Pr4Fe2As2Te1-xO4. Its structure resembles the known 1111 phase except for the considerably larger c lattice constant and ...

Amer Physical Soc2013

Electrical property measurements of Cr-N codoped TiO2 epitaxial thin films grown by pulsed laser deposition

László Forró, Richard Gaal, Arnaud Magrez, Jacim Jacimovic

The temperature dependent resistivity and thermo-electric power of Cr-N codoped TiO2 were compared with that of single element N and Cr doped and undoped TiO2 using epitaxial anatase thin films grown by pulsed laser deposition on (100) LaAlO3 substrates. T ...

AIP American Institute of Physics2013

Study of the surface-ruthenated SnO2/MWCNTs nanocomposite thick-film gas sensors

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

Multi-walled carbon nanotubes (MWCNTs) were successfully coated with tin-dioxide (SnO2) nanopartides using both hydrothermal process and sol-gel technique under different solvent conditions. The obtained MWCNTs/SnO2 nanocomposites had the weight ratio of t ...

Elsevier Science Sa2013

Gas sensors made of multiwall carbon nanotubes modified by tin dioxide

László Forró, Klara Hernadi

Thin film gas sensors made of nanocomposite MWCNT center dot SnO2(1:66), semiconductor compound WO3 center dot SnO2(1:9), and also multicomponent structure MWCNT center dot SnO2(1:66)/WO3 center dot SnO2(1:9) have been fabricated by high-frequency magnetro ...

Allerton Press Inc2013

Sensing hydrogen peroxide by carbon nanotube/horseradish peroxidase bio-nanocomposite

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

H2O2 is a product of reactions catalysed by several oxidase enzymes and it is essential in environmental and pharmaceutical analyses. The most commonly used enzyme in understanding the biological behaviour of catalysed oxidation of H2O2 is horseradish pero ...

Wiley-V C H Verlag Gmbh2013

Comparison of the photocatalytic efficiencies of bare and doped rutile and anatase TiO2 photocatalysts under visible light for phenol degradation and E. coli inactivation

László Forró, Andrzej Sienkiewicz, Klara Hernadi

This study aimed at comparing the photocatalytic efficiencies of various TiO2 based photocatalysts for phenol degradation and bacteria inactivation under illumination with visible light. Commercial undoped anatase and rutile (both from Aldrich), Aeroxide P ...

Elsevier Science Bv2013

Low temperature resistivity, thermoelectricity, and power factor of Nb doped anatase TiO2

László Forró, Richard Gaal, Arnaud Magrez, Jacim Jacimovic

The resistivity of a very high quality anatase TiO2 doped with 6% of Nb was measured from 300K down to 40 mK. No sign of superconductivity was detected. Instead, a minute quantity of cation vacancies resulted in a Kondo scattering. Measurements of thermo-e ...

Amer Inst Physics2013

Molecular and Spin Dynamics in the Paramagnetic Endohedral Fullerene Gd3N@C-80

László Forró, Bálint Náfrádi, Agnes Antal

Gd3N@C-80 endohedral fullerene, a starting material for a potential magnetic resonance imaging contrast agent, is investigated by high-frequency electron spin resonance (ESR) and SQUID magnetometry. The magnetic moments of the three Gd ions of the endohedr ...

Amer Chemical Soc2012

Growth of carbon nanotubes on carbon fibers without strength degradation

László Forró, Jin Won Seo, Arnaud Magrez

Carbon nanotubes (CNTs) are grown on PAN-based carbon fibers by means of catalytic chemical vapor deposition technique. By using catalytic thermal decomposition of hydrocarbon, CNTs can be grown in the temperature range of 650750 degrees C. However, carbon ...

Wiley-V C H Verlag Gmbh2012

Carbon nanotubes-SU8 composite for flexible conductive inkjet printable applications

László Forró, Richard Gaal, Jürgen Brugger, Arnaud Magrez, Kristopher Pataky, Marijana Mionic Ebersold

We have developed a conducting composite based on multi-walled carbon nanotubes and bisphenol A novolak epoxy resin (SU8) for inkjet printing purposes. We could deposit regular conducting stripes and arrays of 150 mu m spots on glass and on flexible polyet ...

Royal Society of Chemistry2012

Testing the Elliott-Yafet spin-relaxation mechanism in KC8: A model system of biased graphene

László Forró, Agnes Antal

Temperature-dependent electron spin resonance (ESR) measurements are reported on stage-1 potassium-doped graphite, a model system of biased graphene. The ESR linewidth is nearly isotropic, and although the g factor has a sizable anisotropy, its majority is ...

2012

Defects and localization in chemically-derived graphene

László Forró, Andrzej Sienkiewicz, Richard Gaal, Arnaud Magrez, Luka Ciric, Jacim Jacimovic, George Cristian Vaju

We have performed electron spin resonance (ESR) measurements on a large assembly of graphene oxide (GO) and reduced graphene oxide (RGO) flakes. In GO samples the Curie tail is coming from 1.4 x 10(18) cm(-3) of localized spins. Although reduction of GO wa ...

Amer Physical Soc2012

Charge stabilization by reaction center protein immobilized to carbon nanotubes functionalized by amine groups and poly(3-thiophene acetic acid) conducting polymer

László Forró, Arnaud Magrez, Klara Hernadi, Endre Horvath

A large number of studies have indicated recently that photosynthetic reaction center proteins (RC) bind successfully to nanostructures and their functional activity is largely retained. The major goal of current research is to find the most efficient syst ...

Wiley-V C H Verlag Gmbh2012

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