Water-Dispersible Small Monodisperse Electrically Conducting Antimony Doped Tin Oxide Nanoparticles
Water-Dispersible Small Monodisperse Electrically Conducting Antimony Doped Tin Oxide Nanoparticles
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DOI：
10.1021/cm504409k
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发表时间：
2015-01
影响因子：
8.6
通讯作者：
K. Peters;P. Zeller;G. Štefanić;V. Skoromets;H. Němec;P. Kužel;D. Fattakhova‐Rohlfing
中科院分区：
文献类型：
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作者：
K. Peters;P. Zeller;G. Štefanić;V. Skoromets;H. Němec;P. Kužel;D. Fattakhova‐Rohlfing
我们描述了晶体导电锑掺杂氧化锡（ATO）纳米颗粒的制备，该纳米颗粒在极性溶剂（如水和乙醇）中高度分散，无需任何稳定剂。通过在叔丁醇中进行简单的溶剂热反应，得到了不同掺杂水平的非团聚单分散ATO纳米颗粒，合成后直接形成了尺寸约为3 nm的单分散纳米晶体。由于锑的取代掺杂，ATO纳米颗粒的电导率大大提高，对于3-5 mol % Sb制备的合成纳米颗粒，电导率达到6.8 × 10-2 S cm-1。这种增加源于未掺杂样品中的跳变到掺杂样品中的带状导电，这是由描述纳米距离上传输的太赫兹（THz）光谱测量所揭示的。在500℃空气中退火后，掺杂纳米粒子的直流电导率提高了约3个数量级，达到62 S cm-1。el……
We describe the fabrication of crystalline electrically conducting antimony-doped tin oxide (ATO) nanoparticles highly dispersible in polar solvents such as water and ethanol without any stabilizing agents. Nonagglomerated monodisperse ATO nanoparticles with different doping levels are obtained by a facile solvothermal reaction in tert-butanol, leading to the formation of monodisperse nanocrystals with a size of about 3 nm directly after synthesis. Electrical conductivity of ATO nanoparticles strongly increases due to the substitutional doping with antimony, reaching 6.8 × 10–2 S cm–1 for the as-synthesized nanoparticles prepared with 3–5 mol % Sb. This increase stems from transition from hopping in the undoped samples to band-like conduction in the doped samples as revealed by terahertz (THz) spectroscopy measurements describing transport on nanometer distances. The dc conductivity of the doped nanoparticles increases by about 3 orders of magnitude up to 62 S cm–1 after annealing in air at 500 °C. The el...