방향족 아민을 이용한 탄소양자점의 합성과 전기화학적 성질

Abstract

We synthesized nitrogen-doped carbon quantum dots using aromatic amines (benzyl amine, phenethylamine, 3-phenylpropylamine) as carbon precursors and it was prepared by using simple thermal treatment and self-passivated by functional group (amine, benzene ring). Also, we have found out a correlation that depend on carbon chain length between benzene ring and the amine in carbon precursors. Aniline carbon quantum dots has smaller size than polyaniline and polyaniline nanoparticles, thereby it has dual-peak photoluminescence and it’s photoluminescence intensity depends on excitation wavelength. And we could observe first exciton peak of carbon quantum dots. In addition, we could find out that size of aromatic amine carbon quantum dots are inversely proportion to carbon chain length between amine and aromatic ring (confirmed by TEM, UV-vis spectrum). Unlike aniline carbon quantum dots, it has excitation wavelength dependent photoluminescence wavelength properties. From the results, we could conclude that carbon quantum dots have different size, optical, electrochemical properties according to carbon chain length between amine and aromatic ring.