Assembly of colloidal semiconductor nanorods in solution by depletion attraction
Baranov, Dmitry LU
; Fiore, Angela
; Van Huis, Marijn
; Giannini, Cinzia
; Falqui, Andrea
; Lafont, Ugo
; Zandbergen, Henny
; Zanella, Marco
; Cingolani, Roberto
and Manna, Liberato
(2010)
In Nano Letters
10(2).
p.743-749
- Abstract
Arranging anisotropic nanoparticles into ordered assemblies remains a challenging quest requiring innovative and Ingenuous approaches. The variety of interactions present in colloidal solutions of nonspherical inorganic nanocrystals can be exploited for this purpose. By tuning depletion attraction forces between hydrophobic colloidal nanorods of semiconductors, dispersed in an organic solvent, these could be assembled into 2D monolayers of close-packed hexagonally ordered arrays directly in solution. Once formed, these layers could be fished onto a substrate, and sheets of vertically standing rods were fabricated, with no additional external bias applied. Alternatively, the assemblies could be isolated and redispersed in polar solvents,... (More)
Arranging anisotropic nanoparticles into ordered assemblies remains a challenging quest requiring innovative and Ingenuous approaches. The variety of interactions present in colloidal solutions of nonspherical inorganic nanocrystals can be exploited for this purpose. By tuning depletion attraction forces between hydrophobic colloidal nanorods of semiconductors, dispersed in an organic solvent, these could be assembled into 2D monolayers of close-packed hexagonally ordered arrays directly in solution. Once formed, these layers could be fished onto a substrate, and sheets of vertically standing rods were fabricated, with no additional external bias applied. Alternatively, the assemblies could be isolated and redispersed in polar solvents, yielding suspensions of micrometer-sized sheets which could be chemically treated directly in solution. Depletion attraction forces were also effective in the shape-selective separation of nanorods from binary mixtures of rods and spheres. The reported procedures have the potential to enable powerful and cost-effective fabrication approaches to materials and devices based on self-organized anisotropic nanoparticles.
(Less)
- author
- Baranov, Dmitry
LU
; Fiore, Angela
; Van Huis, Marijn
; Giannini, Cinzia
; Falqui, Andrea
; Lafont, Ugo
; Zandbergen, Henny
; Zanella, Marco
; Cingolani, Roberto
and Manna, Liberato
- publishing date
- 2010-02-10
- type
- Contribution to journal
- publication status
- published
- keywords
- Depletion forces, Nanocrystals, Nanorods, Self-assembly
- in
- Nano Letters
- volume
- 10
- issue
- 2
- pages
- 7 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:20104878
- scopus:76749150530
- ISSN
- 1530-6984
- DOI
- 10.1021/nl903946n
- language
- English
- LU publication?
- no
- id
- 791d1b2e-42fc-4df2-bb74-687d0a16a367
- date added to LUP
- 2023-01-18 09:39:02
- date last changed
- 2024-05-30 13:58:35
@article{791d1b2e-42fc-4df2-bb74-687d0a16a367,
abstract = {{<p>Arranging anisotropic nanoparticles into ordered assemblies remains a challenging quest requiring innovative and Ingenuous approaches. The variety of interactions present in colloidal solutions of nonspherical inorganic nanocrystals can be exploited for this purpose. By tuning depletion attraction forces between hydrophobic colloidal nanorods of semiconductors, dispersed in an organic solvent, these could be assembled into 2D monolayers of close-packed hexagonally ordered arrays directly in solution. Once formed, these layers could be fished onto a substrate, and sheets of vertically standing rods were fabricated, with no additional external bias applied. Alternatively, the assemblies could be isolated and redispersed in polar solvents, yielding suspensions of micrometer-sized sheets which could be chemically treated directly in solution. Depletion attraction forces were also effective in the shape-selective separation of nanorods from binary mixtures of rods and spheres. The reported procedures have the potential to enable powerful and cost-effective fabrication approaches to materials and devices based on self-organized anisotropic nanoparticles.</p>}},
author = {{Baranov, Dmitry and Fiore, Angela and Van Huis, Marijn and Giannini, Cinzia and Falqui, Andrea and Lafont, Ugo and Zandbergen, Henny and Zanella, Marco and Cingolani, Roberto and Manna, Liberato}},
issn = {{1530-6984}},
keywords = {{Depletion forces; Nanocrystals; Nanorods; Self-assembly}},
language = {{eng}},
month = {{02}},
number = {{2}},
pages = {{743--749}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Nano Letters}},
title = {{Assembly of colloidal semiconductor nanorods in solution by depletion attraction}},
url = {{http://dx.doi.org/10.1021/nl903946n}},
doi = {{10.1021/nl903946n}},
volume = {{10}},
year = {{2010}},
}