Chirality is an important determinant of the optical and electronic properties of single walled carbon nanotubes (SWNTs). Pristine zigzag SWNTs have been functionalized with lipids by a solid state functionalization process. Neither the lipids nor the SWNTs show a circular dichroism (CD) signal prior to functionalization. Upon functionalization, a change in the joint density of electronic states occurs which is reflected by a three-peak G′ band profile and the emergence of a CD signal. A molecular mechanism for the emergent CD signal associated with this lipid-specific self-assembly is described. © the Partner Organisations 2014.

T BHATTACHARYYA

S ROY

P RAY

A KR DASGUPTA

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Journal of Materials Chemistry A

We report both the experimental and theoretical insights of differential electro-diffusion behavior of carbon nanomaterials (e.g. single wall, multiwall carbon nanotubes, and graphene). We thus discriminate one from the other in a soft gel system. The differential mobility of such material depends on their intrinsic properties, both extend and rate of migration bearing the discriminatory signature. The mobility analysis is made by a real time monitoring of the respective bands. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Electrophoresis

Real-time electro-diffusion method to discriminate carbon nanomaterials

We report the differential binding nature of pristine single wall carbon nanotubes (SWNTs) with tryptophan enantiomers. The differential co-operative response between the pristine SWNTs (topologically chiral) and l- and d-tryptophan (geometrically chiral) provides the insight that geometrical chirality itself manifests with topological chirality in a complex way. © the Partner Organisations 2014.

Physical Chemistry Chemical Physics

Chirality sensitive binding of tryptophan enantiomers with pristine single wall carbon nanotubes

Polycyclic aromatic hydrocarbons are components of different odor molecules and they often behave as environmental toxicants. Detection of such hydrocarbons is thus important for both sensing and environmental management perspectives. A simple design for liquid state single wall carbon nanotubes (SWNTs) based nano-capacitor is proposed in this paper. This design excludes the long fabrication process (e.g. integration with field effect transistors, chemo resistors, gravimetric or optical sensors) but includes a simple cyclic voltammetry principle. The specific interaction between the respective hydrocarbons and SWNTs enables detection of hydrocarbons at a significant level of sensitivity (ppm). © 2013 Elsevier B.V. All rights reserved.

Journal of Electroanalytical Chemistry

Carbon nanotubes based supercapacitor for hydrocarbon sensing in liquid state

The interaction between single wall carbon nanotubes (SWNTs) and amphiphilic molecules has been studied in a solid phase. SWNTs are allowed to interact with different amphiphilic probes (e.g.lipids) in a narrow capillary interface. Contact between strong hydrophobic and amphiphilic interfaces leads to a molecular restructuring of the lipids at the interface. The geometry of the diffusion front and the rate and the extent of diffusion of the interface are dependent on the structure of the lipid at the interface. Lecithin having a linear tail showed greater mobility of the interface as compared to a branched tail lipid like dipalmitoyl phosphatidylcholine, indicating the hydrophobic interaction between single wall carbon nanotube core and the hydrophobic tail of the lipid. Solid phase interactions between SWNT and lipids can thus become a very simple but efficient means of discriminating amphiphilic molecules in general and lipids in particular. © 2012 IOP Publishing Ltd.

Journal	Data powered by TypesetJournal of Materials Chemistry A
Publisher	Data powered by TypesetRoyal Society of Chemistry
ISSN	2050-7488