Interaction of single-walled carbon nanotubes with poly(propyl ether imine) dendrimers

Journal Article · Mon Mar 14 00:00:00 EDT 2011 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.3561308· OSTI ID:21560050

Jayamurugan, G; Jayaraman, N ^[1]; Vasu, K S; Kumar, S; Sood, A K ^[2]; Vasumathi, V; Maiti, P K ^[3]

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1. Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012 (India)
2. Department of Physics, Indian Institute of Science, Bangalore 560012 (India)
3. Center for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012 (India)

We study the complexation of nontoxic, native poly(propyl ether imine) dendrimers with single-walled carbon nanotubes (SWNTs). The interaction was monitored by measuring the quenching of inherent fluorescence of the dendrimer. The dendrimer-nanotube binding also resulted in the increased electrical resistance of the hole doped SWNT, due to charge-transfer interaction between dendrimer and nanotube. This charge-transfer interaction was further corroborated by observing a shift in frequency of the tangential Raman modes of SWNT. We also report the effect of acidic and neutral pH conditions on the binding affinities. Experimental studies were supplemented by all atom molecular dynamics simulations to provide a microscopic picture of the dendrimer-nanotube complex. The complexation was achieved through charge transfer and hydrophobic interactions, aided by multitude of oxygen, nitrogen, and n-propyl moieties of the dendrimer.

• OSTI ID: 21560050
• Journal Information: Journal of Chemical Physics, Vol. 134, Issue 10; Other Information: DOI: 10.1063/1.3561308; (c) 2011 American Institute of Physics; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AFFINITY
ATOMS
CARBON
CHARGE EXCHANGE
DENDRITES
ELECTRIC CONDUCTIVITY
ETHERS
FLUORESCENCE
HOLES
HYBRIDIZATION
INTERACTIONS
MOLECULAR DYNAMICS METHOD
MOLECULES
NANOTUBES
NITROGEN
OXYGEN
POLYMERS
QUENCHING
SIMULATION
CALCULATION METHODS
CRYSTALS
ELECTRICAL PROPERTIES
ELEMENTS
EMISSION
LUMINESCENCE
NANOSTRUCTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PHOTON EMISSION
PHYSICAL PROPERTIES