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Open‐tubular nanoelectrochromatography (OT‐NEC): gel‐free separation of single stranded DNAs (ssDNAs) in thermoplastic nanochannels
Electrophoresis ( IF 3.0 ) Pub Date : 2020-07-24 , DOI: 10.1002/elps.202000109
Charuni A. Amarasekara 1, 2 , Uditha S. Athapattu 1, 2 , Chathurika Rathnayaka 1, 2 , Junseo Choi 2, 3 , Sunggook Park 2, 3 , Steven A. Soper 1, 2, 3, 4, 5
Affiliation  

Electrophoresis or electrochromatography carried out in nanometer columns (width and depth) offers some attractive benefits compared to microscale columns. These advantages include unique separation mechanisms that are scale dependent, fast separation times, and simpler workflow due to the lack of a need for column packing and/or wall coatings to create a stationary phase. We report the use of thermoplastics, in this case PMMA, as the substrate for separating single‐stranded DNAs (ssDNAs). Electrophoresis nanochannels were created in PMMA using nanoimprint lithography (NIL), which can produce devices at lower cost and in a higher production mode compared to the fabrication techniques required for glass devices. The nanochannel column in PMMA was successful in separating ssDNAs in free solution that was not possible using microchip electrophoresis in PMMA. The separation could be performed in <1 s with resolution >1.5 when carried out using at an electric field strength of 280 V/cm and an effective column length of 60 μm (100 nm × 100 nm, depth and width). The ssDNAs transport through the PMMA column was driven electrokinetically under the influence of an EOF. The results indicated that the separation was dominated by chromatographic effects using an open tubular nano‐electrochromatography (OT‐NEC) mode of separation. Interesting to these separations was that no column packing was required nor a wall coating to create the stationary phase; the separation was affected using the native polymer that was UV/O3 activated and an aqueous buffer mobile phase.

中文翻译:

开管式纳米电色谱(OT-NEC):热塑性纳米通道中单链DNA(ssDNA)的无凝胶分离

与微米级色谱柱相比,在纳米色谱柱(宽度和深度)中进行的电泳或电色谱分析具有一些吸引人的好处。这些优点包括取决于规模的独特分离机制,快速的分离时间以及由于不需要柱填充和/或壁涂层以形成固定相而需要的工作流程更简单。我们报道了使用热塑性塑料(在本例中为PMMA)作为分离单链DNA(ssDNA)的底物。电泳纳米通道是使用纳米压印光刻(NIL)在PMMA中创建的,与玻璃设备所需的制造技术相比,这种方法可以以更低的成本和更高的生产模式生产设备。PMMA中的纳米通道色谱柱成功分离了游离溶液中的ssDNA,这在PMMA中使用微芯片电泳是不可能的。当使用电场强度为280 V / cm且有效柱长为60μm(100 nm×100 nm,深度和宽度)进行分离时,分离可以在<1 s内以分辨率> 1.5进行。在EOF的影响下,通过电动驱动ssDNA通过PMMA色谱柱的转运。结果表明,使用开放管式纳米电色谱(OT-NEC)分离模式的色谱作用主要是分离。这些分离有趣的是,不需要柱填料也不需要壁涂层即可形成固定相。使用UV / O天然聚合物会影响分离 当使用电场强度为280 V / cm且有效柱长为60μm(100 nm×100 nm,深度和宽度)进行分离时,分离可以在<1 s内以分辨率> 1.5进行。在EOF的影响下,通过电动驱动ssDNAs通过PMMA色谱柱的转运。结果表明,使用开放管式纳米电色谱(OT-NEC)分离模式,分离主要受色谱作用的影响。这些分离有趣的是,不需要柱填料也不需要壁涂层即可形成固定相。使用UV / O天然聚合物会影响分离 当使用电场强度为280 V / cm且有效柱长为60μm(100 nm×100 nm,深度和宽度)进行分离时,分离可以在<1 s内以分辨率> 1.5进行。在EOF的影响下,通过电动驱动ssDNA通过PMMA色谱柱的转运。结果表明,使用开放管式纳米电色谱(OT-NEC)分离模式,分离主要受色谱作用的影响。这些分离有趣的是,不需要柱填料也不需要壁涂层即可形成固定相。使用UV / O天然聚合物会影响分离 在EOF的影响下,通过电动驱动ssDNA通过PMMA色谱柱的转运。结果表明,使用开放管式纳米电色谱(OT-NEC)分离模式,分离主要受色谱作用的影响。这些分离有趣的是,不需要柱填料也不需要壁涂层即可形成固定相。使用UV / O天然聚合物会影响分离 在EOF的影响下,通过电动驱动ssDNAs通过PMMA色谱柱的转运。结果表明,使用开放管式纳米电色谱(OT-NEC)分离模式的色谱作用主要是分离。这些分离有趣的是,不需要柱填料也不需要壁涂层即可形成固定相。使用UV / O天然聚合物会影响分离3活化,并加入含水缓冲液流动相。
更新日期:2020-07-24
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