Affiliation:
1. The First Affiliated Hospital of Jinan University
2. Jinan University
3. Sun Yat-Sen University
4. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
Abstract
This study successfully implements spectrally distinguishable CdSe-ZnS core–shell colloidal quantum dot (CQD) microlasers by a simple, efficient spray printing technique and demonstrates its potential in biosensing. We have systematically characterized the optical properties of printed microring lasers with diameters less than 60 µm. The smallest structure that can be excited has a diameter as small as 30 µm, which is much smaller than the counterparts prepared by piezoelectric ink-jet printing. The detection sensitivity of 4.54 nm/min/refractive index unit is verified in glucose sensing using a printed CQD microlaser. Biosensing of diverse glucose and bovine serum albumin solutions using printed microlasers with the assistance of defects demonstrates a new, to the best of our knowledge, prototype for the development of high-performance, low-cost on-chip microcavity sensors.
Funder
National Natural Science Foundation of China
Science Foundation of Guangzhou City
Subject
Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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