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Synthesis, properties and applicatio...

Wei, Qingqiao.

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Synthesis, properties and applications of nanorods and nanowires.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Synthesis, properties and applications of nanorods and nanowires./
作者:	Wei, Qingqiao.
面頁冊數:	188 p.
附註:	Adviser: Charles M. Lieber.
Contained By:	Dissertation Abstracts International62-10B.
標題:	Chemistry, Inorganic. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3028454
ISBN:	0493408622

Synthesis, properties and applications of nanorods and nanowires.
Wei, Qingqiao.

Synthesis, properties and applications of nanorods and nanowires. - 188 p.

Adviser: Charles M. Lieber.

Thesis (Ph.D.)--Harvard University, 2001.

Nanometer scale structures represent an exciting and rapidly expanding area of research. One dimensional (1D) nanostructures, such as nanorods and nanowires, are ideal and unique systems for investigating phenomena associated with reduced dimensionality and are potential building blocks for nanostructured devices. Understanding their synthesis as well as physical properties is crucial if they are to form the basis for future devices.

ISBN: 0493408622Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Synthesis, properties and applications of nanorods and nanowires.
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245 1 0 $a Synthesis, properties and applications of nanorods and nanowires.
300 $a 188 p.
500 $a Adviser: Charles M. Lieber.
500 $a Source: Dissertation Abstracts International, Volume: 62-10, Section: B, page: 4543.
502 $a Thesis (Ph.D.)--Harvard University, 2001.
520 $a Nanometer scale structures represent an exciting and rapidly expanding area of research. One dimensional (1D) nanostructures, such as nanorods and nanowires, are ideal and unique systems for investigating phenomena associated with reduced dimensionality and are potential building blocks for nanostructured devices. Understanding their synthesis as well as physical properties is crucial if they are to form the basis for future devices.
520 $a The first part of this thesis concerns the synthesis and properties of nanorods and nanowires. Nanorods and nanowires of several materials were successfully synthesized and their properties were studied. First, we developed a solution-based synthesis method that is capable of producing large quantities of very pure (>95%) single-crystal magnesium oxide (MgO) nanorods. It involves 1D growth of a precursor (Mg2(OH)3Cl·4H 2O) with highly anisotropic crystal structure and subsequent transformation from the precursor to the final product via the intermediate Mg(OH)2 nanorods. Structural characterization of MgO nanorods elucidates the mechanism of structural transformation from the precursor to MgO nanorods. Next, single-crystal bismuth telluride (Bi2Te3) and lead telluride (PbTe) nanowires, which are predicted to possess higher thermoelectric efficiency than corresponding 3D bulk materials, were synthesized by a laser ablation method. Structural characterization of these nanowires elucidates their growth mechanisms. Results of electrical conductivity studies on single Bi2Te3 nanowires at room temperature and low temperatures (10 K to 295 K) are also presented and discussed.
520 $a The second part of this thesis concerns applications of nanowires. Silicon nanowire (SiNW)-based field effect transistors (FETs) were successfully transformed into nanosensors for a variety of chemical and biological species, including H<super>+</super>, proteins and metal ions by employing chemical gating effects. Conductance of amine-modified SiNWs is linearly dependent on the solution pH from 2 to 9. Functional pH nanometers can be constructed from amine-modified SiNW FETs. Experiments show that modified SiNW biosensors are capable of sensitive, selective and real-time detection of a wide range of biologically important species in solution. In addition, reversible binding permits real-time quantitative measurement of varying analyte concentrations in the solution. These sensitive electrical-based label-free nanoscale biosensors offer exciting opportunities for array-based screening and <italic>in vivo</italic> diagnostics.
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650 4 $a Chemistry, Inorganic. $3 517253
650 4 $a Chemistry, Physical. $3 560527
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710 2 0 $a Harvard University. $3 528741
773 0 $t Dissertation Abstracts International $g 62-10B.
790 $a 0084
790 1 0 $a Lieber, Charles M., $e advisor
791 $a Ph.D.
792 $a 2001
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