Jha Arunava, Sarkar Sudipta Kumar, Chattopadhyay Kalyan Kumar
School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India.
J Nanosci Nanotechnol. 2020 Dec 1;20(12):7686-7693. doi: 10.1166/jnn.2020.18124.
The current work reveals notable increase in field emission and photoluminescence characteristics of amorphous carbon nanotubes after forming its composite with grown zinc sulfide (ZnS) nanoparticles. An easy chemical technique was employed to synthesize amorphous carbon nanotubes (ACNTs) and then ZnS nanoparticles were grown on them through an solvothermal process. The morphology of the ZnS-ACNTs hybrid material was investigated through scanning electron microscope. Photoluminescence and field emission studies of the material were carried out as well in order to realize the applications. Substantial increase in photoluminescence intensity was found for ZnS-ACNTs hybrid material in comparison with pure amorphous carbon nanotubes, the hybrid also turned out as a better field-emitter than pure amorphous carbon nanotubes. Turnon field for ZnS-ACNTs composite decreased to 6 Vm which was 8 Vm in case of pure amorphous carbon nanotubes. A simulation analysis following finite element modelling method was carried out which ensured the improvement as field emitter for amorphous carbon nanotubes after ZnS nanoparticles were grown on them. Altogether the hybrid material proved to be a potential candidate for luminescent and cold cathode applications.
当前的研究工作表明，非晶态碳纳米管与生长的硫化锌（ZnS）纳米颗粒形成复合材料后，其场发射和光致发光特性有显著提高。采用一种简便的化学技术合成了非晶态碳纳米管（ACNTs），然后通过溶剂热法在其上生长ZnS纳米颗粒。通过扫描电子显微镜研究了ZnS-ACNTs杂化材料的形貌。为了了解其应用，还对该材料进行了光致发光和场发射研究。与纯非晶态碳纳米管相比，发现ZnS-ACNTs杂化材料的光致发光强度大幅增加，该杂化材料也被证明是比纯非晶态碳纳米管更好的场发射体。ZnS-ACNTs复合材料的开启场强降至6 V/μm，而纯非晶态碳纳米管的开启场强为8 V/μm。采用有限元建模方法进行了模拟分析，结果表明在非晶态碳纳米管上生长ZnS纳米颗粒后，其作为场发射体的性能得到了改善。总体而言，该杂化材料被证明是发光和冷阴极应用的潜在候选材料。
