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Microfluidic-integrated graphene optical sensors for real-time and ultra-low flow velocity detection
T. Wu; J. Shen; Z. Li; F. Xing; W. Xin; Z. Wang; G. Liu; X. Han; Z. Man and S. Fu
2021
Source PublicationApplied Surface Science
ISSN1694332
Volume539
AbstractAs microfluidic technology continues to mature, many techniques are being developed to monitor the flow of microfluidics. However, achieving breakthroughs in the real-time detection of ultra-low flow velocity and non-conductive liquid in microfluidic environments remains a major challenge. Here, microfluidic-integrated graphene optical sensorswith a sensitivity of 4.65 105 mVsm1 and a detection limit of 4.9 105 ms1 were designed to address these challenges. We reported our efforts to quantify the impact of ultra-low flow velocity driven by ultra-small levels of pressure. A flow velocity of 3.7 104 ms1 was detected with a signal-to-noise ratio of approximately 7.5. A high-quality graphene layer that was directly grown on glass by an improved low-pressure chemical vapor deposition method and provided several advantages, including controllable thickness, high uniformity, high stability, and corrosion resistance. Graphene also has an excellent polarization-dependent effect. It was extremely sensitive to pressure-driven microfluidic flow because of the interaction between polarization light and the quartz glass/graphene film/medium multilayer-coupling structure, which fed back the signals in real-time. This novel sensor represents a breakthrough in the ultra-low level detection of the flow velocity of non-conductive microfluidics. We expect this sensor to have a broad array of applications in the field of microfluid velocity measurement. 2020 Elsevier B.V.
DOI10.1016/j.apsusc.2020.148232
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Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/65416
Collection中国科学院长春光学精密机械与物理研究所
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T. Wu,J. Shen,Z. Li,et al. Microfluidic-integrated graphene optical sensors for real-time and ultra-low flow velocity detection[J]. Applied Surface Science,2021,539.
APA T. Wu.,J. Shen.,Z. Li.,F. Xing.,W. Xin.,...&Z. Man and S. Fu.(2021).Microfluidic-integrated graphene optical sensors for real-time and ultra-low flow velocity detection.Applied Surface Science,539.
MLA T. Wu,et al."Microfluidic-integrated graphene optical sensors for real-time and ultra-low flow velocity detection".Applied Surface Science 539(2021).
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