Nanosecond pulse width dependence of nonphotochemical laser-induced nucleation of potassium chloride

被引：30
|
作者：
Ward, Martin R. [1 ]
Ballingall, Iain [2 ]
Costen, Matthew L. [2 ]
McKendrick, Kenneth G. [2 ]
Alexander, Andrew J. [1 ]
机构：
[1] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JJ, Midlothian, Scotland
[2] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland
来源：
CHEMICAL PHYSICS LETTERS | 2009年 / 481卷 / 1-3期
基金：
英国工程与自然科学研究理事会;
关键词：
AQUEOUS UREA SOLUTIONS; POLARIZATION DEPENDENCE; CRYSTAL-NUCLEATION; CRYSTALLIZATION; IRRADIATION; POLYMORPH;
D O I：
10.1016/j.cplett.2009.09.049
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of laser pulse width on the efficiency of nonphotochemical laser-induced nucleation (NPLIN) of supersaturated aqueous solutions of KCl has been studied. At equivalent peak-power densities it was observed that the same fractions of samples were nucleated for both short (6 ns) and long (200 ns) near-infrared laser pulses. The results show that the efficiency depends on the peak-power density and not on the duration, or total energy, of the laser pulses. It is concluded that the mechanism is unlikely to be based solely on diffusion of solute to a sub-critical cluster. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：25 / 28
页数：4
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