Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/37468
Title: SYSTEMATIC PREPARATION AND SELF-ASSEMBLY OF FUNCTIONAL NANOCRYSTALS
Authors: ZHANG SHUANGYUAN
Keywords: nanocrystal, synthesis, self-assembly, cobalt phosphide, copper, indium oxide,
Issue Date: 6-Aug-2012
Source: ZHANG SHUANGYUAN (2012-08-06). SYSTEMATIC PREPARATION AND SELF-ASSEMBLY OF FUNCTIONAL NANOCRYSTALS. ScholarBank@NUS Repository.
Abstract: In this dissertation, phase and shape control of binary cobalt phosphide nanostructures is achieved for the first time by the reducing agent and temperature. Iron is successfully incorporated into this system and form composition and shape tunable ternary cobalt-iron phosphide nanocrystals, with magnetic properties altered from paramagnetic to ferromagnetic. The CoP nanowires have been further assembled into large-scale ordered horizontal/vertical alignments via chemical bonding. This is the first report that realizes in-situ self-assembly of large aspect-ratio 1D nanocrystals. The same methodologies have been extended to metal and metal oxide. The copper nanowires with a high thermal and electrical conductivity have been prepared using solution chemical methods. Via a convenient ligand exchange, the common problem like surface oxidation can be prevented and self-assembly is readily achieved. In addition, metal oxide such as indium oxide is also shown to be prepared and self-assembled systematically in solution using different acidic, alkaline coordination solvents.
URI: http://scholarbank.nus.edu.sg/handle/10635/37468
Appears in Collections:Ph.D Theses (Open)

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