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Controlled synthesis of hyper-branched inorganic nanoparticles with rich 3-D structures

Controlled synthesis of hyper-branched inorganic nanoparticles with rich 3-D structures
Controlled synthesis of hyper-branched inorganic nanoparticles with rich 3-D structures
Studies of crystal growth kinetics are tightly integrated with advances in the creation of new nanoscale inorganic building blocks and their functional assemblies 1-11. Recent examples include the development of semiconductor nanorods which have potential uses in solar cells 12-17, and the discovery of a light driven process to create noble metal particles with sharp corners that can be used in plasmonics 18,19. In the course of studying basic crystal growth kinetics we developed a process for preparing branched semiconductor nanocrystals such as tetrapods and inorganic dendrimers of precisely controlled generation 20,21. Here we report the discovery of a crystal growth kinetics regime in which a new class of hyper-branched nanocrystals are formed. The shapes range from 'thorny balls', to tree-like ramified structures, to delicate 'spider net'-like particles. These intricate shapes depend crucially on a delicate balance of branching and extension. The multitudes of resulting shapes recall the diverse shapes of snowflakes 22.The three dimensional nature of the branch points here, however, lead to even more complex arrangements than the two dimensionally branched structures observed in ice. These hyper-branched particles not only extend the available three-dimensional shapes in nanoparticle synthesis ,but also provide a tool to study growth kinetics by carefully observing and modeling particle morphology
Kanaras, A.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Sonnichsen, C.
699d4556-4cb3-4a9f-975e-600a88c9311d
Alivisatos, P.A
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Haita, L.
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Kanaras, A.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Sonnichsen, C.
699d4556-4cb3-4a9f-975e-600a88c9311d
Alivisatos, P.A
9343822d-3713-4c8f-9f51-a005479d2594
Haita, L.
8514fdb3-aed6-45a7-a831-d6af014a7ebb

Kanaras, A., Sonnichsen, C., Alivisatos, P.A and Haita, L. (2005) Controlled synthesis of hyper-branched inorganic nanoparticles with rich 3-D structures. Abstracts of Papers of the American Chemical Society, 230.

Record type: Article

Abstract

Studies of crystal growth kinetics are tightly integrated with advances in the creation of new nanoscale inorganic building blocks and their functional assemblies 1-11. Recent examples include the development of semiconductor nanorods which have potential uses in solar cells 12-17, and the discovery of a light driven process to create noble metal particles with sharp corners that can be used in plasmonics 18,19. In the course of studying basic crystal growth kinetics we developed a process for preparing branched semiconductor nanocrystals such as tetrapods and inorganic dendrimers of precisely controlled generation 20,21. Here we report the discovery of a crystal growth kinetics regime in which a new class of hyper-branched nanocrystals are formed. The shapes range from 'thorny balls', to tree-like ramified structures, to delicate 'spider net'-like particles. These intricate shapes depend crucially on a delicate balance of branching and extension. The multitudes of resulting shapes recall the diverse shapes of snowflakes 22.The three dimensional nature of the branch points here, however, lead to even more complex arrangements than the two dimensionally branched structures observed in ice. These hyper-branched particles not only extend the available three-dimensional shapes in nanoparticle synthesis ,but also provide a tool to study growth kinetics by carefully observing and modeling particle morphology

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Published date: 2005

Identifiers

Local EPrints ID: 57330
URI: https://eprints.soton.ac.uk/id/eprint/57330
PURE UUID: 8d940acf-bc72-4ec0-9a07-29f76f3c46af
ORCID for A. Kanaras: ORCID iD orcid.org/0000-0002-9847-6706

Catalogue record

Date deposited: 15 Aug 2008
Last modified: 14 Mar 2019 01:39

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