Pressure-triggered aggregation-induced emission enhancement in red emissive amorphous carbon dots. Issue 5 (12th June 2019)

• Record Type: Journal Article
• Authors: Wang, Qi; Zhang, Shijie; Wang, Boyang; Yang, Xinyi; Zou, Bo; Yang, Bai; Lu, Siyu
• Is Part Of: Nanoscale horizons. Volume 4:Issue 5(2019)
• Page Start: 1227
• Page End: 1231
• Publication Date: 2019-06-12
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c9nh00287a
• Languages: English
• ISSNs: 2055-6756

Abstract

Abstract : Red emissive carbon dots' pressure-triggered aggregation-induced emission enhancement. Abstract : Carbon dots have received extensive attention due to their unique chemical structure, excellent optoelectronic properties and convenient synthesis. However, the synthesis of carbon dots with stable red wavelength luminescence remains a challenge. Here, we used the ethanol solvothermal method with 1, 3, 5-benzenetrithiol as the raw material to prepare carbon dots with red emission (R-CDs). When the concentration of R-CDs increased, the fluorescence emission of the R-CDs red-shifted to the near infrared region. Importantly, the as-synthesized R-CDs offer fluorescence enhancement under external pressure due to pressure-triggered aggregation-induced emission. Fluorescence measurements of the depressurization process show that the R-CDs also have a reversible piezochromic luminescence (1 atm–1.2 GPa). The R-CDs have notable optical properties and great biocompatibility, and we used them for a transparent fluorescent thin film, light emitting diode (LED) and cell imaging. The excellent optical properties of R-CDs indicate their broad potential applicability in biomedical and luminescent materials.