Concentration dependent carbon nanodots: Tunable luminescent color and fluorescence excitation-wavelength dependence

被引：3

作者：

Qin, Libo ^{[1
]}

Song, Yang ^{[2
]}

Zhang, Yuanyuan ^{[3
]}

Gao, Wei ^{[1
]}

Meng, Xiaoyue ^{[1
]}

Bai, Yufei ^{[1
]}

Geng, Kexing ^{[1
]}

Niu, Pengyan ^{[1
]}

Wang, Yiru ^{[1
]}

Wu, Na ^{[1
]}

Bai, Jianliang ^{[1
,4
]}

Ma, Jianlong ^{[1
]}

Ren, Lili ^{[4
]}

机构：

[1] Changzhi Univ, Dept Chem, Changzhi 046011, Peoples R China

[2] Changzhi Med Coll, Lab Anim Ctr, Changzhi 046000, Peoples R China

[3] Changzhi Univ, Dept Math, Changzhi 046011, Peoples R China

[4] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2025年 / 679卷

关键词：

Carbon nanodots; Concentration dependence; Excitation-wavelength dependence; Excitation-wavelength independence; Room-temperature phosphorescence; DOTS; EMISSION;

D O I：

10.1016/j.jcis.2024.10.091

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Carbon nanodots (CNDs) exhibiting concentration dependent properties have been synthesized through a one- pot hydrothermal reaction process utilizing diethylenetriamine and L-aspartic acid. At solid-state or high concentrations, the CNDs display excitation-wavelength independent fluorescence (FL) emissions, while at low concentrations, they exhibit excitation-wavelength dependent FL emissions. Detailed characterization of the structure and optical properties reveals that the concentration dependent FL properties can be ascribed to the intrinsic-state luminescence of the CNDs at low concentrations and the assembled-state luminescence at solidstate/high concentrations. With the increase of concentration, the self-assembly behavior of CNDs may cause the transition from intrinsic-state dominant luminescence to assembled-state dominant luminescence, and finally lead to the red-shift of FL color. Furthermore, the CNDs@Urea composites possess adjustable room-temperature phosphorescence (RTP) from turquoise to yellow by controlling the CNDs doping concentration. CNDs with concentration dependent optical properties have shown certain potentials in the fields of cell imaging, fingerprint recognition and anti-counterfeiting applications.

引用

页码：135 / 143

页数：9

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