Gote Gorkshnath H, Deshpande Madhura P, Bhopale Somnath R, More Mahendra A, Monteiro Lobato Raphael Longuinhos, Ribeiro-Soares Jenaina, Late Dattatray J
Sir Parashurambhau College (Autonomous), Department of Physics Pune-411030 India.
Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University 84 Heukseok-ro, Dongjak District Seoul 06974 Republic of Korea.
Nanoscale Adv. 2024 Nov 13;7(1):310-319. doi: 10.1039/d4na00539b. eCollection 2024 Dec 17.
Au nanoparticles (NPs) are decorated on hydrothermally synthesized BiS nanorods (NRs) to enhance the field electron emission (FEE) performance as compared to bare BiS nanorods, resulting in reduction in turn-on field from 3.7 to 2.7 V μm (at the current density of 1.0 μA cm) with significant increment in maximum emission current density from 138 to 604.8 μA cm (at a field of 7.8 V μm) respectively. FESEM/TEM reveals that BiS nanoflowers are assembled from BiS NRs of a typical diameter of 120 ± 10 nm, and Au NPs of diameter about 5-10 nm are uniformly decorated onto the surface of NRs to form an Au/BiS composite. XRD analysis suggests that the as-synthesized product consists of orthorhombic BiS NRs decorated with face-centered cubic Au NPs. The XPS spectrum shows the elemental mapping of the as-synthesized Au/BiS. Improvement in field emission properties is mainly attributed to a reduction in work function and increasing emitting sites due to Au NP decoration.
与裸铋硫（BiS）纳米棒相比，通过水热合成法在铋硫纳米棒（NRs）上修饰金（Au）纳米颗粒（NPs）以增强场电子发射（FEE）性能，从而使开启场从3.7 V/μm降低至2.7 V/μm（在电流密度为1.0 μA/cm²时），同时最大发射电流密度从138 μA/cm²显著增加至604.8 μA/cm²（在电场为7.8 V/μm时）。场发射扫描电子显微镜/透射电子显微镜（FESEM/TEM）显示，铋硫纳米花由典型直径为120±10 nm的铋硫纳米棒组装而成，直径约为5 - 10 nm的金纳米颗粒均匀地修饰在纳米棒表面，形成金/铋硫复合材料。X射线衍射（XRD）分析表明，合成产物由面心立方金纳米颗粒修饰的正交晶系铋硫纳米棒组成。X射线光电子能谱（XPS）光谱显示了合成的金/铋硫的元素分布图。场发射性能的改善主要归因于由于金纳米颗粒修饰导致的功函数降低和发射位点增加。
