DNA-templated zinc cadmium sulfide

Data to support the manuscript "Structure and Optical properties of ZnxCd1–xS and Cu:ZnxCd1–xS templated on DNA molecules". One-dimensional ZnxCd1–xS and Cu:ZnxCd1–xS nanostructures were prepared using DNA as a template to promote growth along the molecular axis. The formation of homogeneously alloyed nanocrystals with cubic zinc blende-type structures was verified using X-ray diffraction and Raman spectroscopy. X-ray photoemission spectra revealed the presence of Cu(I) in the doped Cu:ZnxCd1–xS nanocrystals. The effectiveness of the DNA template to direct the semiconductor growth in one dimension was demonstrated by AFM and TEM. The nanostructures displayed a granular morphology comprising nanoparticles with an average diameter of 14 nm composed of assemblies of smaller crystallites of 2.0 nm in size. Rope-like assemblies with an average diameter of 48 nm and extending in length to several hundred micrometres were obtained by evaporation-induced self-assembly. UV-Vis absorption and emission spectra indicated that the optical bandgaps (2.89–4.00 eV) and photoluminescence peaks (608–819 nm) of the DNA-templated nanocrystals could be precisely controlled by modifying the molar ratios of their Zn/Cd precursors. Doping with Cu(I) gave an increase in photoluminescence intensity and a composition-independent red-shift of 0.23 eV.

本数据集旨在支持论文《基于DNA分子的ZnxCd1–xS及Cu:ZnxCd1–xS的结构与光学性质》。采用DNA分子作为模板，成功制备了一维ZnxCd1–xS和Cu:ZnxCd1–xS纳米结构，并促进了沿分子轴的生长。通过X射线衍射和拉曼光谱验证了均匀合金化的立方闪锌矿型纳米晶的形成。X射线光电子能谱揭示了掺杂Cu(I)在Cu:ZnxCd1–xS纳米晶体中的存在。利用原子力显微镜（AFM）和透射电子显微镜（TEM）证明了DNA模板在指导一维半导体生长方面的有效性。这些纳米结构呈现出由平均直径为14纳米的纳米颗粒组成的颗粒状形态，这些纳米颗粒由2.0纳米大小的较小晶粒组装而成。通过蒸发诱导的自组装，获得了平均直径为48纳米的绳状组装体，其长度可达数毫米。紫外-可见吸收和发射光谱表明，通过调整其Zn/Cd前驱体的摩尔比，可以精确控制DNA模板纳米晶的光学带隙（2.89–4.00 eV）和光致发光峰（608–819 nm）。掺杂Cu(I)增加了光致发光强度，并使光致发光峰发生了与组成无关的红移，红移量为0.23 eV。