Terminal deoxynucleotidyl transferase (TdT)-catalyzed homo-nucleotides-constituted ssDNA: Inducing tunable-size nanogap for core-shell plasmonic metal nanostructure and acting as Raman reporters for detection of Escherichia coli O157:H7.

具有内部纳米间隙的核壳等离子体金属纳米颗粒因其在表面增强拉曼光谱（SERS）中的强信号增强而成为理想纳米结构。本文将末端脱氧核苷酸转移酶（TdT）催化生成的DNA引入核壳纳米结构制备，用于检测大肠杆菌O157:H7（E. coli O157:H7）细胞。TdT延伸产物——由同种核苷酸组成的长单链DNA（hn-D）不仅可诱导尺寸可调的...