東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Production of ions & particles via s...

Larriba-Andaluz, Carlos.

Linked to FindBook

Google Book

Amazon

博客來

Production of ions & particles via simple and compound electrosprays in vacuum, gases or liquids (polar and non-polar).

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Production of ions & particles via simple and compound electrosprays in vacuum, gases or liquids (polar and non-polar)./
Author:	Larriba-Andaluz, Carlos.
Description:	198 p.
Notes:	Source: Dissertation Abstracts International, Volume: 72-03, Section: B, page: 1745.
Contained By:	Dissertation Abstracts International72-03B.
Subject:	Chemistry, Molecular. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3440595
ISBN:	9781124424491

Production of ions & particles via simple and compound electrosprays in vacuum, gases or liquids (polar and non-polar).
Larriba-Andaluz, Carlos.

Production of ions & particles via simple and compound electrosprays in vacuum, gases or liquids (polar and non-polar). - 198 p.

Source: Dissertation Abstracts International, Volume: 72-03, Section: B, page: 1745.

Thesis (Ph.D.)--Yale University, 2010.

Various applications of electrosprays (ES) are studied, including injecting ions and drops from the Taylor-cone of an ionic liquid (IL) into a dielectric liquid. In a quiescent heptane bath the injected current is space-charge dominated, is independent of IL flow rate QIL, and scales algebraically with voltage V, needle-to-extractor distance L, and drop mobility Z, as 1~ZV2/L. This leads to a scaling law of the radius of the IL droplets proportional to V-1 and QIL1/2. When heptane has a free surface, charge drifts onto it, destabilizes it, leading to the formation of a jet that atomizes into monodisperse micron-size insulator drops. These drops are at a constant fraction of the Rayleigh limit, with a diameter DD related to the dielectric flow QD, as ~(QD/I)2/3 and the injected IL current I. Reducing the needle diameters leads to the production of dielectric drop diameters of &grave;&grave;~300nm. An anomaly is observed at low QD and high QIL, when the mean drop charge appears to exceed the Rayleigh limit. Gas phase mobility measurements (IMS) of IL drops after evaporation of the heptane show diameters of 3--25nm, as well as ions, all injected directly by the IL into the insulator.

ISBN: 9781124424491Subjects--Topical Terms:

1676084
Chemistry, Molecular.

Production of ions & particles via simple and compound electrosprays in vacuum, gases or liquids (polar and non-polar).
LDR:03195nam 2200301 4500 001 1404874
005 20111201132945.5
008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124424491
035 $a (UMI)AAI3440595
035 $a AAI3440595
040 $a UMI $c UMI
100 1 $a Larriba-Andaluz, Carlos. $3 1684217
245 1 0 $a Production of ions & particles via simple and compound electrosprays in vacuum, gases or liquids (polar and non-polar).
300 $a 198 p.
500 $a Source: Dissertation Abstracts International, Volume: 72-03, Section: B, page: 1745.
500 $a Adviser: Juan Fernandex de la Mora.
502 $a Thesis (Ph.D.)--Yale University, 2010.
520 $a Various applications of electrosprays (ES) are studied, including injecting ions and drops from the Taylor-cone of an ionic liquid (IL) into a dielectric liquid. In a quiescent heptane bath the injected current is space-charge dominated, is independent of IL flow rate QIL, and scales algebraically with voltage V, needle-to-extractor distance L, and drop mobility Z, as 1~ZV2/L. This leads to a scaling law of the radius of the IL droplets proportional to V-1 and QIL1/2. When heptane has a free surface, charge drifts onto it, destabilizes it, leading to the formation of a jet that atomizes into monodisperse micron-size insulator drops. These drops are at a constant fraction of the Rayleigh limit, with a diameter DD related to the dielectric flow QD, as ~(QD/I)2/3 and the injected IL current I. Reducing the needle diameters leads to the production of dielectric drop diameters of &grave;&grave;~300nm. An anomaly is observed at low QD and high QIL, when the mean drop charge appears to exceed the Rayleigh limit. Gas phase mobility measurements (IMS) of IL drops after evaporation of the heptane show diameters of 3--25nm, as well as ions, all injected directly by the IL into the insulator.
520 $a On another application, Polyethylene-glycol(PEG) ions produced in air by ES are analyzed by tandem IMS-Mass spectrometry (MS). Ammonium-acetate and dimethylammonium-acetate buffers yield high charge states at which PEG ions are stretched into linear configurations. In this regime, ion mobility is uniquely related to mass/charge (m/z), and mobility separation is ineffective. A triethylammonium-formate buffer yields reduced charge states, though much of the reduction takes place in the ion guide to the MS rather than at the ESI source. The distinction between these two charge-reduction mechanisms is difficult without IMS, and is made here for the first time. The ions produced by these buffers populate all possible PEG structures, from linear chains to near-spheres. The structure of ions carrying z charges, first resolved here, includes a single globular center carrying n charges, attached to one or two external linear appendices carrying z-n solvated single charges in a bead on a string configuration.
590 $a School code: 0265.
650 4 $a Chemistry, Molecular. $3 1676084
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0431
690 $a 0542
690 $a 0548
710 2 $a Yale University. $3 515640
773 0 $t Dissertation Abstracts International $g 72-03B.
790 1 0 $a Mora, Juan Fernandex de la, $e advisor
790 $a 0265
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3440595