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Electrical and Plas...
Electrical and Plasmonic Properties of Ligand-Free Sn4+-Doped In2O3 (ITO) Nanocrystals
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- Jagadeeswararao, Metikoti (författare)
- IISER, Dept Chem, Pune 411008, Maharashtra, India.
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- Pal, Somnath (författare)
- Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India.
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- Nag, Angshuman (författare)
- IISER, Dept Chem, Pune 411008, Maharashtra, India.
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- Sarma, Dipankar Das (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik,Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India.;CSIR NISE, New Delhi 110001, India.
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IISER, Dept Chem, Pune 411008, Maharashtra, India Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India. (creator_code:org_t)
- 2016-01-13
- 2016
- Engelska.
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Ingår i: ChemPhysChem. - : Wiley. - 1439-4235 .- 1439-7641. ; 17:5, s. 710-716
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Sn4+-doped In2O3 (ITO) is a benchmark transparent conducting oxide material. We prepared ligand-free but colloidal ITO (8nm, 10% Sn4+) nanocrystals (NCs) by using a post-synthesis surface-modification reaction. (CH3)(3)OBF4 removes the native oleylamine ligand from NC surfaces to give ligand-free, positively charged NCs that form a colloidal dispersion in polar solvents. Both oleylamine-capped and ligand-free ITO NCs exhibit intense absorption peaks, due to localized surface plasmon resonance (LSPR) at around =1950nm. Compared with oleylamine-capped NCs, the electrical resistivity of ligand-free ITO NCs is lower by an order of magnitude (approximate to 35mcm(-1)). Resistivity over a wide range of temperatures can be consistently described as a composite of metallic ITO grains embedded in an insulating matrix by using a simple equivalent circuit, which provides an insight into the conduction mechanism in these systems.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- conducting materials
- doping
- ITO nanocrystals
- surface modification
- surface plasmon resonance
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