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利用溶胶-凝胶法制备不同粒径的PbTiO3纳米晶．表面光电压谱的研究结果表明，随粒径尺寸的减小，其表面光伏响应发生谱带加宽现象，并出现新的体相跃迁光伏响应结构．这些特性是小尺寸PbTiO3纳米晶内不同于体相PbTiO3的Ti4+的d轨道配位环境的体现．
Preparation of PbTiO3 Nanocrystals with Different Particle Size by Sol - Gel Method. The results of surface photovoltage spectroscopy show that the surface photovoltage response broadens as the particle size decreases, and a new phase transition photovoltaic response structure appears. These characteristics are the d orbital coordination environment of Ti4 + which is different from bulk PbTiO3 in the small-size PbTiO3 nanocrystals.