期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 75, 期 2, 页码 486-491出版社
AMER INST PHYSICS
DOI: 10.1063/1.1637437
关键词
-
We present a design for the detection of relaxation kinetics by midinfrared transient spectroscopy. Spectra can be collected with 150 ns time resolution after a single pump pulse. This eliminates the need for flowing samples and the shot-to-shot background noise common in pump-probe spectroscopy. Difference frequency generation from a Ti:sapphire oscillator with a dual-wavelength profile produces broadband femtosecond IR pulses tunable below 1800 cm(-1) at 91 MHz repetition rate. This pulse train probes a sample by direct absorption, followed by dispersion of the 200 cm(-1) wide spectra in a double-prism spectrometer onto a fast multichannel mercury cadmium telluride detector. In our setup, sample relaxation is initiated by a single temperature jump. We present the fast folding dynamics of the protein lambda repressor as an application. (C) 2004 American Institute of Physics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据