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Unique applications of nanomaterials...

Clark, Jonathan E.

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Unique applications of nanomaterials in separation science.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Unique applications of nanomaterials in separation science./
作者:	Clark, Jonathan E.
面頁冊數:	298 p.
附註:	Source: Dissertation Abstracts International, Volume: 72-01, Section: B, page: .
Contained By:	Dissertation Abstracts International72-01B.
標題:	Chemistry, Analytical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3435664
ISBN:	9781124346243

Unique applications of nanomaterials in separation science.
Clark, Jonathan E.

Unique applications of nanomaterials in separation science. - 298 p.

Source: Dissertation Abstracts International, Volume: 72-01, Section: B, page: .

Thesis (Ph.D.)--The Ohio State University, 2010.

Separation efficiency is inversely related to stationary phase diameter. Improvements in stationary phase manufacturing have led to micron-sized particles for packing. If packing materials could be decreased down to the nanometer scale, the band dispersion would theoretically be lowered by 6 orders of magnitude. However, the quest towards the use of nanomaterials in chromatography has encountered serious challenges such as extremely high back pressures and problems associated with frits. Ideal chromatographic methods to examine the performance of nano-stationary phases would be free of complicated packing methods. Work described in this dissertation illustrates two such techniques: ultra-thin layer chromatography (UTLC) and electrokinetic chromatography (EKC).

ISBN: 9781124346243Subjects--Topical Terms:

586156
Chemistry, Analytical.

Unique applications of nanomaterials in separation science.
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500 $a Source: Dissertation Abstracts International, Volume: 72-01, Section: B, page: .
500 $a Adviser: Susan V. Olesik.
502 $a Thesis (Ph.D.)--The Ohio State University, 2010.
520 $a Separation efficiency is inversely related to stationary phase diameter. Improvements in stationary phase manufacturing have led to micron-sized particles for packing. If packing materials could be decreased down to the nanometer scale, the band dispersion would theoretically be lowered by 6 orders of magnitude. However, the quest towards the use of nanomaterials in chromatography has encountered serious challenges such as extremely high back pressures and problems associated with frits. Ideal chromatographic methods to examine the performance of nano-stationary phases would be free of complicated packing methods. Work described in this dissertation illustrates two such techniques: ultra-thin layer chromatography (UTLC) and electrokinetic chromatography (EKC).
520 $a Electrospinning is a simple and inexpensive method to create nanomaterials of different morphology (i.e. fibers, ribbons, beads) and was found to be an ideal way to fabricate TLC devices with nanoscale stationary phases. Polymer stationary phases such as polyacrylonitrile (PAN) as well as glassy carbon nanofibers demonstrate superior chromatographic properties in the separation of laser dyes, steroidal compounds and fluorescently labeled essential amino acids.
520 $a Electrokinetic chromatography (EKC) has also been shown to be a nanocompatible chromatographic method. EKC takes advantage of a mobile, pseudo-stationary phase (PSP) plug rather than a packed or immobilized phase. Studies of ordered carbon nanomaterials and their retention characteristics are described using electrokinetic chromatography. Small organic molecules and their acids were used as initial analytes to elucidate the selectivity of the edge-plane carbon nanorods and compared to results obtained using amorphous carbon nanorods. A separation of 4 beta blocker pharmaceuticals were also separated using edge-plane carbon PSP. The electrical properties of unique carbon nanomaterials studied in this dissertation are also examined in Chapter 5 to aid in the understanding of these materials in an electrically driven method such as EKC.
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