中文摘要：

水热合成的ZnSe量子点具有严重的表面缺陷,导致了其荧光发光不稳定,限制了它的实际应用。采用紫外光修饰法,调控水溶性ZnSe量子点的荧光光谱,结果表明：随着紫外光修饰时间的增加,近带边发射峰红移且发光强度显著增强;同时出现584 nm的表面缺陷峰且发光强度逐渐增强。随着紫外光对合成产物ZnSe量子点溶液修饰时间的增加,增加了量子受限效应和表面缺陷,使得近带边荧光发射峰强度增强且红移,而表面缺陷辐射峰值位置不变,但强度有大幅的增加。此研究结果可以应用于生物传感和光开关等器件领域。

英文摘要：

Zinc selenide（ ZnSe） quantum dots（ QDs） had serious surface defects in hydro-thermal synthesis,which usually leads to the instability of fluorescence（ FL） radiation and limited practical application. Ultraviolet（ UV） modification method was used to control the FL spectrum of water soluble ZnSe QDs. The results show that the near-band-edge emission peak was red shift and its intensity significantly enhanced with the increase of the irradiation time of UV light; meanwhile,a surface defect peak occurred with increase of luminous intensity. With the increase of UV modified time to ZnSe QDs,the quantum confinement effects and surface defects increase,the near-band-edge emission peak enhanced and appeared red shift,and the position of radiation peak of surface defect did not change,just increased its strength substantially. The research results could be widely used in biological sensor and optical switch device field.