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Hydrogel-based microbeads for Raman-encoded suspension array using the reversed-phase suspension polymerization method and ultraviolet light curing.
Analytical and Bioanalytical Chemistry ( IF 4.3 ) Pub Date : 2020-03-10 , DOI: 10.1007/s00216-020-02528-5
Xuejing Chen 1, 2 , Xuesi Zhou 1 , Qinghua He 1 , Yonghong He 1, 2 , Tian Guan 1, 3 , Guangxia Feng 1 , Bei Wang 1 , Luyuan Xie 1 , Yanhong Ji 4
Affiliation  

A one-step synthesis using the reversed-phase suspension polymerization method and ultraviolet light curing is proposed for preparing the Raman-encoded suspension array (SA). The encoded microcarriers are prepared by doping the Raman reporter molecules into an aqueous phase, and then dispersing the aqueous phase in an oil phase and curing by ultraviolet light irradiation. The multiplexed biomolecule detection and various concentration experiments confirm the qualitative and quantitative analysis capabilities of the Raman-encoded SA with a limit of detection of 52.68 pM. The narrow bandwidth of the Raman spectrum can achieve a large number of codes in the available spectral range and the independence between the encoding channel and the fluorescent label channel provides the encoding method with high accuracy. This preparation method is simple and easy to operate, low in cost, and high in efficiency. A large number of hydrogel-based encoding microbeads could be quickly obtained with good biocompatibility. Most importantly, concentrating plenty of Raman reporter molecules inside the microbeads increases the signal intensity and means the molecular assembly is not limited by the functional groups; thus, the types of materials available for Raman encoding method are expanded. Furthermore, the signal intensity-related encoding method is verified by doping different proportions of Raman reporter molecules with our proposed synthesis method, which further increases the detection throughput of Raman-encoded SA. Graphical Abstract.

中文翻译:

基于反相悬浮聚合法和紫外光固化的拉曼编码悬浮阵列的基于水凝胶的微珠。

提出了一种采用反相悬浮聚合法和紫外光固化的一步法合成拉曼编码悬浮阵列的方法。通过将拉曼报告分子掺入水相中,然后将水相分散在油相中并通过紫外线照射固化来制备编码的微载体。多重生物分子检测和各种浓度实验证实了拉曼编码SA的定性和定量分析能力,检出限为52.68 pM。拉曼光谱的窄带宽可以在可用光谱范围内实现大量编码,并且编码通道和荧光标记通道之间的独立性提供了高精度的编码方法。该制备方法简单易行,成本低廉,效率高。可以快速获得具有良好生物相容性的大量基于水凝胶的编码微珠。最重要的是,在微珠中浓缩大量拉曼报告分子会增加信号强度,这意味着分子组装不受官能团的限制;因此,扩展了可用于拉曼编码方法的材料的类型。此外,我们提出的合成方法通过掺杂不同比例的拉曼报告分子来验证信号强度相关的编码方法,从而进一步提高了拉曼编码SA的检测通量。图形概要。可以快速获得具有良好生物相容性的大量基于水凝胶的编码微珠。最重要的是,在微珠内部集中大量拉曼报告分子会增加信号强度,这意味着分子组装不受官能团的限制;因此,扩展了可用于拉曼编码方法的材料的类型。此外,我们提出的合成方法通过掺杂不同比例的拉曼报告分子来验证信号强度相关的编码方法,从而进一步提高了拉曼编码SA的检测通量。图形概要。可以快速获得具有良好生物相容性的大量基于水凝胶的编码微珠。最重要的是,在微珠中浓缩大量拉曼报告分子会增加信号强度,这意味着分子组装不受官能团的限制;因此,扩展了可用于拉曼编码方法的材料的类型。此外,我们提出的合成方法通过掺杂不同比例的拉曼报告分子来验证与信号强度有关的编码方法,从而进一步提高了拉曼编码SA的检测通量。图形概要。因此,扩展了可用于拉曼编码方法的材料的类型。此外,我们提出的合成方法通过掺杂不同比例的拉曼报告分子来验证信号强度相关的编码方法,从而进一步提高了拉曼编码SA的检测通量。图形概要。因此,扩展了可用于拉曼编码方法的材料的类型。此外,我们提出的合成方法通过掺杂不同比例的拉曼报告分子来验证与信号强度有关的编码方法,从而进一步提高了拉曼编码SA的检测通量。图形概要。
更新日期:2020-03-10
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