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Synthesis and characterization of pa...

Cable, Robert E.

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Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds./
作者:	Cable, Robert E.
面頁冊數:	165 p.
附註:	Advisers: Raymond E. Schaak; James D. Batteas.
Contained By:	Dissertation Abstracts International69-01B.
標題:	Chemistry, Inorganic. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3296341
ISBN:	9780549428411

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.
Cable, Robert E.

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds. - 165 p.

Advisers: Raymond E. Schaak; James D. Batteas.

Thesis (Ph.D.)--Texas A&M University, 2007.

As devices and new technologies continue to shrink, nanocrystalline multi-metal compounds are becoming increasingly important for high efficiency and multifunctionality. However, synthetic methods to make desirable nanocrystalline multi-metallics are not yet matured. In response to this deficiency, we have developed several solution-based methods to synthesize nanocrystalline binary alloy and intermetallic compounds. This dissertation describes the processes we have developed, as well as our investigations into the use of lithographically patterned surfaces for template-directed self-assembly of solution dispersible colloids.

ISBN: 9780549428411Subjects--Topical Terms:

517253
Chemistry, Inorganic.

Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.
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100 1 $a Cable, Robert E. $3 1279989
245 1 0 $a Synthesis and characterization of patterned surfaces and catalytically relevant binary nanocrystalline intermetallic compounds.
300 $a 165 p.
500 $a Advisers: Raymond E. Schaak; James D. Batteas.
500 $a Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0310.
502 $a Thesis (Ph.D.)--Texas A&M University, 2007.
520 $a As devices and new technologies continue to shrink, nanocrystalline multi-metal compounds are becoming increasingly important for high efficiency and multifunctionality. However, synthetic methods to make desirable nanocrystalline multi-metallics are not yet matured. In response to this deficiency, we have developed several solution-based methods to synthesize nanocrystalline binary alloy and intermetallic compounds. This dissertation describes the processes we have developed, as well as our investigations into the use of lithographically patterned surfaces for template-directed self-assembly of solution dispersible colloids.
520 $a We used a modified polyol process to synthesize nanocrystalline intermetallics of late transition and main-group metals in the M-Sn, Pt- M', and Co-Sb systems. These compounds are known to have interesting physical properties and as nanocrystalline materials they may be useful for magnetic, thermoelectric, and catalytic applications. While the polyol method is quite general, it is limited to metals that are somewhat easy to reduce. Accordingly, we focused our synthetic efforts on intermetallics comprised of highly electropositive metals. We find that we can react single-metal nanoparticles with zero-valent organometallic Zinc reagents in hot, coordinating amine solvents via a thermal decomposition process to form several intermetallics in the M''-Zn system. Characterization of the single-metal intermediates and final intermetallic products shows a general retention of morphology throughout the reaction, and changes in optical properties are also observed. Following this principle of conversion chemistry, we can employ the high reactivity of nanocrystals to reversibly convert between intermetallic phases within the Pt-Sn system, where PtSn2 ↔ PtSn ↔ Pt3Sn. Our conversion chemistry occurs in solution at temperatures below 300°C and within 1 hour, highlighting the high reactivity of our nanocrystalline materials compared to the bulk. Some evidence of the generality for this process is also presented.
520 $a Our nanocrystalline powders are dispersible in solution, and as such are amenable to solution-based processing techniques developed for colloidal dispersions. Accordingly, we have investigated the use of lithographically patterned surfaces to control the self-assembly of colloidal particles. We find that we can rapidly crystallize 2-dimensional building blocks, as well as use epitaxial templates to direct the formation of interesting superlattice structures comprised of a bidisperse population of particles.
590 $a School code: 0803.
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0488
710 2 $a Texas A&M University. $3 718977
773 0 $t Dissertation Abstracts International $g 69-01B.
790 $a 0803
790 1 0 $a Batteas, James D., $e advisor
790 1 0 $a Schaak, Raymond E., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3296341