CAJ | 학술논문

本文采用油浴加热柠檬酸一步法合成碳量子点，用HRTEM透射电镜和FTIR红外光谱对其形貌和结构进行表征。研究该碳量子点的荧光性质，初步探讨了其发光的可能机理。实验结果表明，该方法合成的碳量子点粒径大小为3～5 nm，在360 nm处有一个很强的紫外吸收峰，最大激发波长和发射波长分别为365 nm和460 nm，其光学稳定性良好，在pH5.0~7.0范围内，碳量子点的荧光强度随pH的变化比较敏感。
본문채용유욕가열저몽산일보법합성탄양자점，용HRTEM투사전경화FTIR홍외광보대기형모화결구진행표정。연구해탄양자점적형광성질，초보탐토료기발광적가능궤리。실험결과표명，해방법합성적탄양자점립경대소위3～5 nm，재360 nm처유일개흔강적자외흡수봉，최대격발파장화발사파장분별위365 nm화460 nm，기광학은정성량호，재pH5.0~7.0범위내，탄양자점적형광강도수pH적변화비교민감。
Carbon quantum dots (carbon QDs) was synthesized via oil bath heating using citric acid as materials, and the morphology and structure of carbon QDs were characterized by HRTEM and FITR. The fluorescence properties were stud-ied and the possible fluorescence mechanism of carbon QDs was discussed. The results indicated that carbon QDs were uni-form in size (3~5 nm) and the maximum excitation and emission wavelengths were 365 nm and 460 nm, respectively with a strong UV absorption peak at 360 nm. The fluorescence of carbon QDs was stable and showed pH dependently in pH 5.0~7.0.