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Aerodynamic focusing of nanoparticles.

Wang, Xiaoliang.

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Aerodynamic focusing of nanoparticles.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Aerodynamic focusing of nanoparticles./
Author:	Wang, Xiaoliang.
Description:	217 p.
Notes:	Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2197.
Contained By:	Dissertation Abstracts International67-04B.
Subject:	Engineering, Mechanical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3215094
ISBN:	9780542648267

Aerodynamic focusing of nanoparticles.
Wang, Xiaoliang.

Aerodynamic focusing of nanoparticles. - 217 p.

Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2197.

Thesis (Ph.D.)--University of Minnesota, 2006.

Aerodynamic lens systems have revolutionalized the field of chemical analysis of aerosol particles with mass spectrometers in the past decade. The focusing performance of conventional aerodynamic lenses degrades drastically as particle diameters drop below 20nm, due to their low inertia and high diffusivity. In this thesis, we carried out analytical, numerical and experimental studies of focusing nanoparticles smaller than 30 rim. We also developed a software tool that automates the lens design process.

ISBN: 9780542648267Subjects--Topical Terms:

783786
Engineering, Mechanical.

Aerodynamic focusing of nanoparticles.
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020 $a 9780542648267
035 $a (UnM)AAI3215094
035 $a AAI3215094
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100 1 $a Wang, Xiaoliang. $3 1914121
245 1 0 $a Aerodynamic focusing of nanoparticles.
300 $a 217 p.
500 $a Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 2197.
500 $a Adviser: Peter H. McMurry.
502 $a Thesis (Ph.D.)--University of Minnesota, 2006.
520 $a Aerodynamic lens systems have revolutionalized the field of chemical analysis of aerosol particles with mass spectrometers in the past decade. The focusing performance of conventional aerodynamic lenses degrades drastically as particle diameters drop below 20nm, due to their low inertia and high diffusivity. In this thesis, we carried out analytical, numerical and experimental studies of focusing nanoparticles smaller than 30 rim. We also developed a software tool that automates the lens design process.
520 $a We first developed a procedure to optimize the lens dimensions and operating conditions for nanoparticle focusing. We found that lighter carrier gases helps to focus smaller sizes and that multiple lenses working at suboptimal Stokes numbers focus a wide range of nanoparticles. We derived expressions for the operating pressure and lens dimensions that minimize particle diffusion while keeping the flow subsonic.
520 $a We also developed a numerical simulation methodology to characterize the performance of aerodynamic lens systems. By solving the flow field and particle motion, we can accurately estimate the particle terminal velocity, transport efficiency, beam width, and divergence angle.
520 $a A nanoparticle lens system was designed, built and evaluated both numerically and experimentally. Focusing was evident for particles in the size range of 3-30 nm.
520 $a Finally, we parameterized the design procedure, numerical and experimental results and implemented them in the "Aerodynamic lens Calculator" for convenient lens design and performance test.
590 $a School code: 0130.
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0548
710 2 0 $a University of Minnesota. $3 676231
773 0 $t Dissertation Abstracts International $g 67-04B.
790 1 0 $a McMurry, Peter H., $e advisor
790 $a 0130
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3215094