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以三乙二醇为表面配体,利用沉淀法制备了β-Ga_2O_3∶Cr~(3+)近红外(NIR)长余辉纳米颗粒.考察了反应条件对β-Ga_2O_3∶Cr~(3+)的发光性能和晶体结构的影响,并初步探讨了其NIR余辉发光机理.结果表明,当溶液的p H值为7,煅烧温度为700℃时,可获得高纯度的β-Ga_2O_3∶Cr~(3+)纳米颗粒,其平均粒径为30 nm,最大余辉发射波长可调控为750 nm,NIR余辉发光时间长于384 h.本方法得到的β-Ga_2O_3∶Cr~(3+)长余辉纳米颗粒不仅尺寸小,而且NIR余辉时间长,发射波长可调控,在低背景噪音的深组织活体成像中具有潜在的应用前景.
Β-Ga 2 O 3: Cr 3+ near-infrared (NIR) long-lasting nanoparticles were synthesized by the precipitation method using triethyleneglycol as the surface ligand.The effects of reaction conditions on the growth of β-Ga 2 O 3: Cr 3+ , And the mechanism of its NIR afterglow was investigated. The results show that when the p H value of the solution is 7 and the calcination temperature is 700 ℃, the high purity β-Ga 2 O 3: Cr ( 3+) nanoparticles with an average particle diameter of 30 nm, a maximum afterglow emission wavelength of 750 nm and a long afterglow period of more than 384 h. The obtained β-Ga 2 O 3: Cr 3+ long-lasting nanoparticle Not only the size is small, but also long afterglow of NIR and the emission wavelength can be controlled. It has potential application in deep tissue live imaging with low background noise.