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Metal nanoprisms: Synthesis, optical...

Xue, Can.

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Metal nanoprisms: Synthesis, optical properties, and assembly.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Metal nanoprisms: Synthesis, optical properties, and assembly./
Author:	Xue, Can.
Description:	205 p.
Notes:	Adviser: Chad A. Mirkin.
Contained By:	Dissertation Abstracts International69-02B.
Subject:	Chemistry, Inorganic. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3290652
ISBN:	9780549470427

Metal nanoprisms: Synthesis, optical properties, and assembly.
Xue, Can.

Metal nanoprisms: Synthesis, optical properties, and assembly. - 205 p.

Adviser: Chad A. Mirkin.

Thesis (Ph.D.)--Northwestern University, 2007.

Metal nanoprisms are a novel class of anisotropic nanomaterials with unique optical properties dependent on their size, shape, and composition. Silver nanoprisms are of particular interest because their surface plasmon resonance bands are readily tunable in the visible and near-IR region. The objectives of this thesis research focus on photochemical synthesis of silver nanoprisms, formation mechanism, optical properties, and assembly strategies.

ISBN: 9780549470427Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Metal nanoprisms: Synthesis, optical properties, and assembly.
LDR:03877nam 2200349 a 45 001 947983
005 20110524
008 110524s2007 ||||||||||||||||| ||eng d
020 $a 9780549470427
035 $a (UMI)AAI3290652
035 $a AAI3290652
040 $a UMI $c UMI
100 1 $a Xue, Can. $3 1271445
245 1 0 $a Metal nanoprisms: Synthesis, optical properties, and assembly.
300 $a 205 p.
500 $a Adviser: Chad A. Mirkin.
500 $a Source: Dissertation Abstracts International, Volume: 69-02, Section: B, page: 1011.
502 $a Thesis (Ph.D.)--Northwestern University, 2007.
520 $a Metal nanoprisms are a novel class of anisotropic nanomaterials with unique optical properties dependent on their size, shape, and composition. Silver nanoprisms are of particular interest because their surface plasmon resonance bands are readily tunable in the visible and near-IR region. The objectives of this thesis research focus on photochemical synthesis of silver nanoprisms, formation mechanism, optical properties, and assembly strategies.
520 $a Chapter two presents a pH-controlled method for the synthesis of silver nanoprisms through single beam excitation. This development substantially simplifies the prism synthesis by eliminating the need for secondary irradiation, which was previously used to suppress prism fusion. With appropriate pH regulation, one can achieve excellent control over the nanoprism edge length and the corresponding plasmon bands.
520 $a Chapter three describes a way of assembling silver nanoprisms on amine-terminated substrates. The prism-coated glass substrates exhibit reversible optical changes when repeatedly cycled between the dry and wet states. This optical phenomenon is attributed to the high sensitivity of the prism dipole plasmon band to the environmental dielectric constant.
520 $a Chapter four introduces a novel strategy for coating silver nanoprisms with silica by using 16-mercaptohexadecanoic acid (MHA) as a mediation layer. The resulting prismatic core-shell nanostructures exhibit improved stability and surface functionality as compared with bare silver nanoprisms.
520 $a Chapter five demonstrates the significance of plasmon excitation in the photomediated growth of triangular silver nanoprisms by using gold nanoparticles as plasmonic seeds and reaction labels. This approach yields a novel core-shell nanostructure that contains a spherical gold core with a triangular silver prism shell. The architecture of these structures is tunable by controlling excitation wavelengths and the diameter of the gold core.
520 $a In chapter six, the photomediated growth mechanism of silver nanoprisms is investigated. This photochemical process is driven by silver redox cycles involving reduction of silver cations by citrate on the silver particle surface and oxidative dissolution of small silver particles facilitated by BSPP. The plasmonic silver particles serve as photocatalysts and mediate the Ag + reduction by citrate under plasmon excitation. These relatively small silver particles and BSPP act like a buffer in the photoreaction to keep the silver ion concentration constant (&sim;20 muM), which facilitates the Ag+ deposition on the silver particle surface under photochemical control. Moreover, we have discovered that dipole plasmon excitation favors selective formation of prismatic silver nanostructures and sharp tip triangular nanoprism growth, while quadrupole excitation leads to truncated prism growth.
590 $a School code: 0163.
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0488
710 2 $a Northwestern University. $b Chemistry. $3 1030729
773 0 $t Dissertation Abstracts International $g 69-02B.
790 $a 0163
790 1 0 $a Mirkin, Chad A., $e advisor
790 1 0 $a Schatz, George C. $e committee member
790 1 0 $a Stupp, Samuel I. $e committee member
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3290652