Biosensing by Direct Observation of Leaky Waveguide Modes
Biosensing by Direct Observation of Leaky Waveguide Modes
复制标题
通过直接观察泄漏波导模式进行生物传感
DOI:
10.1088/1742-6596/1919/1/012002
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Gupta R
中科院分区:
文献类型:
--
作者:
Gupta R
The resonance angles of leaky waveguides (LWs) can be observed directly as exponentially decaying interference fringes in waveguides with refractive index that is 0.001–0.01 higher than cover, and when illuminated with wedge-shaped light beam. This work for the first time shows that such LWs can be realised using hydrogels of acrylamide copolymerised with N-(3-aminopropyl) methacrylamide hydrochloride (APMA). LWs made of 4.5%(w: v) acrylamide/APMA crosslinked with poly (ethylene glycol) diacrylate (PEGDA, M n: 700Da) were∼ 59% and∼ 56% porous to 100kDa and 300kDa species, which are typical molecular weights of biomolecules, and hence were selected for biosensing of immunoglobulin G (IgG) with protein A–biotin (PAB) as biomolecular recognition element. The limit of detection of the acrylamide/APMA LW for IgG was 3.69±0.37 nM, which is at least 1/100 th of the dissociation constant of the PAB-IgG binding partners used in this work. Future work will investigate the application of acrylamide/APMA LW for biosensing of clinically relevant analytes.
影响因子:
8.4
作者:
Goddard, Nicholas J.;Gupta, Ruchi
通讯作者:
Gupta, Ruchi
影响因子:
3.8
作者:
Troparevsky, M. Claudia;Sabau, Adrian S.;Zhang, Zhenyu
通讯作者:
Zhang, Zhenyu
DOI:
10.1039/c3an36714b
发表时间:
2013
期刊:
The Analyst
影响因子:
--
作者:
Ruchi Gupta;N. Goddard
通讯作者:
N. Goddard