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Probing the dynamic structural changes of dna using ultrafast laser pulse in graphene-based optofluidic device

InfoMat 2021年第3期3卷 316-326页

作者： Bannur NShivananju Lu Zhou Yuefeng Yin Wenzhi Yu Babar Shabbir Haoran Mu Xiaozhi Bao Yiqiu Zhang Sun Tian Qingdong Ou Shaojuan Li Mohammad MHossain Yupeng Zhang Huaiyu Shao Guichuan Xing Nikhil V.Medhekar Chang-Ming Li Jian Liu Qiaoliang Bao Institute of Advanced Cross-field Science College of Life ScienceQingdao UniversityQingdaoPeople's Republic of China Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityClaytonVictoriaAustralia Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhouPeople's Republic of China College of Electronic Science and Technology and College of Optoelectronics Engineering Shenzhen UniversityShenzhenPeople's Republic of China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering(IAPME)University of MacaoMacaoPeople's Republic of China Institute of Material Science and Devices Suzhou University of Science and TechnologySuzhouPeople's Republic of China

The ultrafast monitoring of deoxyribonucleic acid(dna)dynamic structural changes is an emerging and rapidly growing research topic in *** existing optical spectroscopy used to identify different dynamical dna structures lacks quick response while requiring large consumption of samples and bulky instrumental *** is highly demanded to develop an ultrafast technique that monitors dna structural changes with the external stimulus or cancer-related disease ***,we demonstrate a novel photonic integrated graphene-optofluidic device to monitor dna structural changes with the ultrafast response *** approach is featured with an effective and straightforward design of decoding the electronic structure change of graphene induced by its interactions with dnas in different conformations using ultrafast nanosecond pulse laser and achieving refractive index sensitivity of~3×10^(−5) *** innovative technique for the first time allows us to perform ultrafast monitoring of the conformational changes of special dna molecules structures,including G-quadruplex formation by K+ions and i-motif formation by the low pH *** graphene-optofluidic device as presented here provides a new class of label-free,ultrafast,ultrasensitive,compact,and cost-effective optical biosensors for medical and healthcare applications.

关键词： dna optical biosensor graphene optofluidic device two-dimensional materials ultrafast fiber laser

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