News Column

Studies from Indian Institute of Chemical Technology Reveal New Findings on Nanomaterials

June 27, 2014

By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Nanomaterials. According to news reporting originating from Andhra Pradesh, India, by NewsRx correspondents, research stated, "Carbonaceous materials are a promising class of materials for potential application as chemical and biomolecule sensors. In this work we have done first principles calculations to study the interaction of various small molecules, such as CO2, H2O, NH3, CH4 and H-2, on the surface of carbon nanotubes (CNTs) and graphene in order to study their feasibility as gas sensors."

Our news editors obtained a quote from the research from the Indian Institute of Chemical Technology, "Model systems for armchair and zigzag CNTs of different diameter have been considered to study the effect of chirality and curvature of the carbon nanomaterials on binding with these small molecules. Our results reveal that these gas molecules have been weakly physisorbed on the surface and act as charge donors to the carbon nanomaterials. Charge transfer between the gas molecules and the carbon materials impacts the physical properties of the carbon materials, which may be traced to their sensitivity. As the gas molecules are physisorbed on the carbon materials, they may be suitable for repetitive sensor operation."

According to the news editors, the research concluded: "Significant changes in the polarizability of the carbon materials have been observed on binding with the gas molecules and monitoring such changes provides valuable guidance in designing optimal gas sensors based on carbon materials that could satisfy the demand in various fields."

For more information on this research see: Feasibility of carbon nanomaterials as gas sensors: a computational study. Current Science, 2014;106(9):1224-1234. Current Science can be contacted at: Indian Acad Sciences, C V Raman Avenue, Sadashivanagar, P B #8005, Bangalore 560 080, India (see also Nanomaterials).

The news editors report that additional information may be obtained by contacting D. Umadevi, CSIR, Indian Inst Chem Technol, Center Mol Modeling, Hyderabad 500607, Andhra Pradesh, India.

Keywords for this news article include: Asia, India, Andhra Pradesh, Nanotechnology, Emerging Technologies

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Source: Science Letter

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