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Selective Modification of Nanocrystals.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Selective Modification of Nanocrystals./
Author:	Chen, Alexander N.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	154 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
Contained By:	Dissertations Abstracts International83-02B.
Subject:	Chemistry. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28546823
ISBN:	9798516976605

Selective Modification of Nanocrystals.
Chen, Alexander N.

Selective Modification of Nanocrystals. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 154 p.

Source: Dissertations Abstracts International, Volume: 83-02, Section: B.

Thesis (Ph.D.)--Indiana University, 2021.

This item must not be sold to any third party vendors.

Metallic nanocrystals present desirable properties for many applications, including catalysis and medicine. The functional properties of a multimetallic nanocrystal depend strongly upon the internal organization of its constituent atoms, that is, its architecture. Therefore, the ideal nanoparticle synthesis should aim to produce atomically precise structures, which would possess correspondingly precise properties, tailorable to a desired application. In pursuit of this idealized precision, it is important to be able to modify nanocrystals selectively. Doing so allows us to access multifunctional hybrid nanostructures where an unmodified region coexists with a modified region of the nanocrystal to combine the properties of both regions in one potentially synergistic structure. This thesis will explore selective modification through two synthetic methods: seeded growth and galvanic replacement. For seeded growth, crystal growth theory will be used to derive a generalizable method to selectively deposit material on some of a seed's vertices over others, yielding anisotropic bimetallic products. Vertex-selective deposition will work to address a general challenge in colloidal syntheses whereby the solution surrounding a growing nanoparticle is presumed identical in every direction, leaving no clear route to favoring growth on one side of the particle over another. Next, studying the galvanic replacement of bimetallic sacrificial templates will show selectivity of the replacement reaction for the less noble template metal while also bringing forward the influence of vacancy diffusion and surface diffusion in the synthesis of architecturally complex trimetallic products. More broadly, mechanistic insights into the replacement of bimetallic templates will work to make galvanic replacement as reliable a synthetic tool for the synthesis of tri- and multimetallic nanocrystals as it currently is for the synthesis of bimetallic nanocrystals.

ISBN: 9798516976605Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Nanocrystals

Selective Modification of Nanocrystals.
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245 1 0 $a Selective Modification of Nanocrystals.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 154 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
500 $a Advisor: Skrabalak, Sara E.
502 $a Thesis (Ph.D.)--Indiana University, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Metallic nanocrystals present desirable properties for many applications, including catalysis and medicine. The functional properties of a multimetallic nanocrystal depend strongly upon the internal organization of its constituent atoms, that is, its architecture. Therefore, the ideal nanoparticle synthesis should aim to produce atomically precise structures, which would possess correspondingly precise properties, tailorable to a desired application. In pursuit of this idealized precision, it is important to be able to modify nanocrystals selectively. Doing so allows us to access multifunctional hybrid nanostructures where an unmodified region coexists with a modified region of the nanocrystal to combine the properties of both regions in one potentially synergistic structure. This thesis will explore selective modification through two synthetic methods: seeded growth and galvanic replacement. For seeded growth, crystal growth theory will be used to derive a generalizable method to selectively deposit material on some of a seed's vertices over others, yielding anisotropic bimetallic products. Vertex-selective deposition will work to address a general challenge in colloidal syntheses whereby the solution surrounding a growing nanoparticle is presumed identical in every direction, leaving no clear route to favoring growth on one side of the particle over another. Next, studying the galvanic replacement of bimetallic sacrificial templates will show selectivity of the replacement reaction for the less noble template metal while also bringing forward the influence of vacancy diffusion and surface diffusion in the synthesis of architecturally complex trimetallic products. More broadly, mechanistic insights into the replacement of bimetallic templates will work to make galvanic replacement as reliable a synthetic tool for the synthesis of tri- and multimetallic nanocrystals as it currently is for the synthesis of bimetallic nanocrystals.
590 $a School code: 0093.
650 4 $a Chemistry. $3 516420
650 4 $a Nanoscience. $3 587832
650 4 $a Surface chemistry. $3 551428
650 4 $a Nanoparticles. $3 605747
650 4 $a Symmetry. $3 536815
650 4 $a Seeds. $3 573605
650 4 $a Nanocrystals. $3 605740
650 4 $a Ligands. $3 686413
650 4 $a Nanomaterials. $3 3558221
650 4 $a Methods. $3 3560391
650 4 $a Energy. $3 876794
650 4 $a Physical properties. $3 3564184
650 4 $a Morphology. $3 591167
650 4 $a Atoms & subatomic particles. $3 3560412
653 $a Nanocrystals
690 $a 0485
690 $a 0565
690 $a 0287
690 $a 0791
710 2 $a Indiana University. $b Chemistry. $3 1020748
773 0 $t Dissertations Abstracts International $g 83-02B.
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791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28546823