An Open-source, Cost-Efficient Excitation Module for Single-molecule Microscopy
An Open-source, Cost-Efficient Excitation Module for Single-molecule Microscopy
复制标题
用于单分子显微镜的开源、经济高效的激发模块
DOI:
10.1101/2022.02.28.482236
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
George D
中科院分区:
文献类型:
--
作者:
George D
In fluorescence microscopy, scientific-grade laser diodes are key components and contribute a considerable expense to the total cost of the microscope setup. Existing open-source laser excitation modules are mainly designed for super-resolution imaging and have not been fully characterised to meet the requirements of single-molecule spectroscopy measurements. In this paper we introduce an open-source, cost-efficient excitation module that can be used for confocal, accurate single-molecule FRET, fluorescence correlation spectroscopy (FCS) and low-power super-resolution techniques. The module delivers two diode lasers (520 nm and 638 nm) via a single-mode fibre, with stable power output (<1% deviation), which can be modulated on the microsecond timescale. Here, we benchmark these lasers against smFRET standards, and recover consistent diffusion coefficients from FCS measurements, thereby demonstrating their suitability for a range of single-molecule spectroscopic experiments, whilst reducing the overall costs of our open-source smFRET instrument (the smfBox) by ~50%, making these types of experiments even more accessible to the widest possible userbase.
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影响因子:
3.7
作者:
Nicovich PR;Walsh J;Böcking T;Gaus K
通讯作者:
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DOI:
10.1101/796482
发表时间:
2019-10
期刊:
bioRxiv
影响因子:
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作者:
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作者:
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通讯作者:
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