Nanoscale ferroelectric and piezoelectric properties of Sb2S3 nanowire arrays.
Nanoscale ferroelectric and piezoelectric properties of Sb2S3 nanowire arrays.
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DOI：
10.1021/nl2039106
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发表时间：
2012-01
期刊：
影响因子：
10.8
通讯作者：
Justin M. Varghese;S. Barth;L. Keeney;R. Whatmore;J. Holmes
中科院分区：
文献类型：
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作者：
Justin M. Varghese;S. Barth;L. Keeney;R. Whatmore;J. Holmes
我们首次观察到嵌入阳极氧化铝模板中的单个 Sb(2)S(3) 纳米线的压电性和铁电性。开关光谱-压电响应力显微镜（SS-PFM）测量表明，单个c轴取向的Sb（2）S（3）纳米线表现出铁电和压电开关行为。标称直径为200和100 nm的Sb(2)S(3)纳米线在2 pm V(-1)附近显示出d(33(eff))值，而50 nm直径纳米线获得的压电系数在0.8 pm V(-1)附近相对较低。在 200 和 100 nm Sb(2)S(3) 纳米线中观察到约 1.8 μC cm(-2) 的自发极化 (P(s))，与块状 Sb(2)S(3) 相比增强了 100%，这可能是由于合成的纳米线具有无缺陷、单晶性质。在 Sb(2)S(3) 纳米线中观察到的 180° 铁电单畴是由于沿极性 c 轴的均匀偏振排列所致。
We report the first observation of piezoelectricity and ferroelectricity in individual Sb(2)S(3) nanowires embedded in anodic alumina templates. Switching spectroscopy-piezoresponse force microscopy (SS-PFM) measurements demonstrate that individual, c-axis-oriented Sb(2)S(3) nanowires exhibit ferroelectric as well as piezoelectric switching behavior. Sb(2)S(3) nanowires with nominal diameters of 200 and 100 nm showed d(33(eff)) values around 2 pm V(-1), while the piezo coefficient obtained for 50 nm diameter nanowires was relatively low at around 0.8 pm V(-1). A spontaneous polarization (P(s)) of approximately 1.8 μC cm(-2) was observed in the 200 and 100 nm Sb(2)S(3) nanowires, which is a 100% enhancement when compared to bulk Sb(2)S(3) and is probably due to the defect-free, single-crystalline nature of the nanowires synthesized. The 180° ferroelectric monodomains observed in Sb(2)S(3) nanowires were due to uniform polarization alignment along the polar c-axis.