牛血清蛋白-Au配合物及其复合物制备及表征

Preparation and characterization of bovine serum albumin(BSA)-Au complexes and the Au nanoparticle@BSA-Au nanocomposites

以牛血清蛋白(bovine serum albumin,BSA)、氯金酸(HAuCl4)、NaOH等为原料,采用一锅合成法制备了牛血清蛋白-Au配合物(BSA-Au),观察到了样品的宽带红光荧光发射。通过库仑力作用将BSA-Au与表面带有正电荷的金纳米颗粒进行复合,对纳米复合物的吸收光谱及荧光光谱特性进行了研究。实验结果表明,在本实验条件下,金纳米颗粒虽然增强了复合物样品在可见光区域的光吸收,但对BSA-Au红光发光有猝灭作用。

Bovine serum albumin（BSA）-Au complexes were synthesized by the one-pot method with BSA, HAuCl4 and NaOH as the starting materials.Red photoluminescence was observed from the sample.Au nanoparticle@BSA-Au composites were fabricated via the Coulomb interaction between the negatively charged BSA-Au and the positively charged Au nanoparticles.Optical absorption and photoluminesence properties of the samples were investigated.The experimental results show that optical absorption in the visible region wasenhanced for the Au nanoparticle@BSA-Au composites,due to the localized surface plasmon resonance. However,the luminescence of BSA-Au was quenched. Further work on improving the structure of the Au nanoparticle@BSA-Au composites needs to be conducted.