期刊
ACS SENSORS
卷 5, 期 3, 页码 870-878出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.0c00219
关键词
paper-based microarray; multiplexed detection; Hg2+; Pb2+; Cu2+; carbon nanodots; point-of-need detection
资金
- Guangdong Natural Science Foundation [S2017A030313076]
- Science and Technology Project of Guangzhou [201803020026]
- Shenzhen Basic Research Program [JCYJ20170307140752183]
The development of cost-effective and versatile sensing system for simultaneous and rapid quantitation of multiple targets is highly demanded for environmental surveillance, food safety inspection, home healthcare, etc. This work reports on (1) paper-based microarrays relying on fluorescence turn-off of carbon nanodots (CDs) for analyte recognition and (2) a stand-alone smartphone-based portable reader (SBR) installed with a custom-designed APP (SBR-App), which can accurately and reproducibly acquire fluorescence change from the microarray chip, automatically report the results, generate and share the reports via wireless network. Simultaneous detection of Hg2+, Pb2+, and Cu2+ in the Pearl River water samples was achieved with the reported sensing system. End-user operation is limited to pipet samples to the microarray chip, insert the chip to the SBR, and open the SBR-App to acquire an image 5 min after sample introduction. There is no requirement for complicated sample pre-treatment and expensive equipment except for a smartphone. This versatile and costeffective smartphone-based sensing system featured with reliability and simplicity is ideally suited for user- and eco-friendly point-ofneed detection in resource-constrained environments.
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