We report a smartphone spectrometer with nanometer resolution working in the visible range. A G-Fresnel device with the dual functionality of focusing and dispersion is used to enable miniaturization. Proof of principle application to Bradford assay of protein concentration is also demonstrated.
C. Zhang, G. Cheng, P. Edwards, M. Zhou, S. Zheng and Z. Liu, Lab Chip, 2016, 16, 246 DOI: 10.1039/C5LC01226K
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