Open hardware microsecond dispersive transient absorption spectrometer for linear optical response.
Open hardware microsecond dispersive transient absorption spectrometer for linear optical response.
复制标题
打开硬件微秒色散瞬态吸收光谱仪，用于线性光学响应。
DOI：
10.1007/s43630-021-00127-6
复制
发表时间：
2022-01
期刊：
影响因子：
--
通讯作者：
van Thor JJ
中科院分区：
文献类型：
--
作者：
Hutchison CDM;Parker S;Chukhutsina V;van Thor JJ
提出了一种开放式的瞬态吸收光谱仪的硬件设计和实现方法，该光谱仪具有微秒级的时间分辨率，可测量380 ~ 750 nm可见光谱范围内的全差光谱。该仪器已被设计为允许瞬态吸收光谱测量的低或高量子产率的过程相结合的强烈的亚微秒激发闪光，使用氙灯与频闪的非光化白色光探测，使用LED光源驱动下的高脉冲电流从电容器组。该仪器是敏感的，以解决0.15 mOD闪光引起的差异在1000测量内，20 Hz的重复率使用廉价的CCD传感器，200 μm的像素尺寸，40 K电子全阱容量和动态范围为1800。激发闪光的脉冲持续时间为230 ns，2 mJ的闪光能量允许光谱滤波，同时保持高功率密度，聚焦产生10-4-10-1 ΔOD范围内的mOD信号。我们提出了完整的电子设计和建设的闪光灯和探针源，光学以及定时电子和CCD光谱仪的操作和修改的内部信号参考。使用刚果红染料的微秒TAS证明了性能表征和示例测量，作为在2%的低量子产率光反应的示例，其中高达78%的分子被激发。该仪器是完全开放的硬件，并结合了廉价的商业组件，光学和电子选择，并允许光致反应的线性响应测量的化学动力学的准确的全球分析的目的。在线版本包含补充材料，可通过10.1007/s43630-021-00127-6获得。
An open hardware design and implementation for a transient absorption spectrometer are presented that has microsecond time resolution and measures full difference spectra in the visible spectral region from 380 to 750 nm. The instrument has been designed to allow transient absorption spectroscopy measurements of either low or high quantum yield processes by combining intense sub-microsecond excitation flashes using a xenon lamp together with stroboscopic non-actinic white light probing using LED sources driven under high pulsed current from a capacitor bank. The instrument is sensitive to resolve 0.15 mOD flash-induced differences within 1000 measurements at 20 Hz repetition rate using an inexpensive CCD sensor with 200 μm pixel dimension, 40 K electrons full well capacity and a dynamic range of 1800. The excitation flash has 230 ns pulse duration and the 2 mJ flash energy allows spectral filtering while retaining high power density with focussing to generate mOD signals in the 10–4–10–1 ΔOD range. We present the full electronics design and construction of the flash and probe sources, the optics as well as the timing electronics and CCD spectrometer operation and modification for internal signal referencing. The performance characterisation and example measurements are demonstrated using microsecond TAS of Congo red dye, as an example of a low quantum yield photoreaction at 2% with up to 78% of molecules excited. The instrument is fully open hardware and combines inexpensive selection of commercial components, optics and electronics and allows linear response measurements of photoinduced reactions for the purpose of accurate global analysis of chemical dynamics. The online version contains supplementary material available at 10.1007/s43630-021-00127-6.
登录
查看更多内容
影响因子：
4.3
作者：
Dorlhiac GF;Fare C;van Thor JJ
通讯作者：
van Thor JJ
影响因子：
3.7
作者：
van Wilderen LJ;Lincoln CN;van Thor JJ
通讯作者：
van Thor JJ
影响因子：
5.7
作者：
Konold, Patrick E.;Mathes, Tilo;Kennis, John T. M.
通讯作者：
Kennis, John T. M.
影响因子：
2.8
作者：
Hutchison, Christopher D. M.;Kaucikas, Marius;van Thor, Jasper J.
通讯作者：
van Thor, Jasper J.
影响因子：
3.4
作者：
Müller, MG;Niklas, J;Holzwarth, AR
通讯作者：
Holzwarth, AR