Electrical and thermal properties of silver nanowire fabricated on a flexible substrate by two-beam laser direct writing for designing a thermometer.
Electrical and thermal properties of silver nanowire fabricated on a flexible substrate by two-beam laser direct writing for designing a thermometer.
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DOI：
10.1039/c8ra03280g
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发表时间：
2018-07-09
期刊：
影响因子：
3.9
通讯作者：
Zhao, Zhen-Sheng
中科院分区：
文献类型：
--
作者：
He, Gui-Cang;Lu, Heng;Dong, Xian-Zi;Zhang, Yong-Liang;Liu, Jie;Xie, Chang-Qing;Zhao, Zhen-Sheng
准确了解电导率和热导率的温度依赖性在温度计的设计中起着至关重要的作用。在这里，通过使用双光束激光直写系统，一个单独的银纳米线（AgNW）具有明确的尺寸制造的聚对苯二甲酸乙二醇酯（PET）基板上。在10 ~ 300 K的温度范围内测量了所制备的AgNW的电阻率随温度的变化关系，并用Bloch-Grüneisen公式拟合。AgNW的剩余电阻率（（1.62 ± 0.20）× 10−7 Ω m）大于体材料的剩余电阻率（1 × 10−11 Ω m）。银纳米线的电子-声子耦合常数为（1.08 ± 0.13）× 10−7 Ω m，大于体银的电子-声子耦合常数（5.24 × 10−8 Ω m）。此外，AgNW的德拜温度为199.30 K，低于体银的德拜温度（235 K）。发现所制备的AgNW的洛伦兹数随着温度的升高而减小。此外，室温下洛伦兹数（2.66 × 10 - 7 W Ω K-2）大于索末菲值（2.44 × 10 - 8 W Ω K-2）。测量结果可用于设计40-300 K温度范围内的温度计。的AgNW的灵活性也是优秀的，和AgNW的电阻增加只有2.58%，当AgNW弯曲约1000倍，弯曲半径为1 mm。调查的电阻率，热导率和洛伦兹数的银纳米线的温度依赖性，和温度计的设计。
Accurate knowledge of electrical conductivity and thermal conductivity temperature dependence plays a crucial role in the design of a thermometer. Here, by using a two-beam laser direct writing system, an individual silver nanowire (AgNW) with well-defined dimensions is fabricated on a polyethylene terephthalate (PET) substrate. The temperature dependence of the resistivity of the fabricated AgNW is measured ranging from 10 to 300 K, and fitted with the Bloch–Grüneisen formula. The residual resistivity ((1.62 ± 0.20) × 10−7 Ω m) of the AgNW is larger than that of the bulk material (1 × 10−11 Ω m). The electron–phonon coupling constant of the AgNW is (1.08 ± 0.13) × 10−7 Ω m, which is larger than that of the bulk silver (5.24 × 10−8 Ω m). Moreover, the Debye temperature of the AgNW is 199.30 K and is lower than that of the bulk silver (235 K). The Lorenz number of the fabricated AgNW is found to decrease as the temperature increases. Besides, the Lorenz number (2.66 × 10−7 W Ω K−2) is larger than the Sommerfeld value (2.44 × 10−8 W Ω K−2) at room temperature. The measurement results allow one to design a thermometer in the temperature range 40–300 K. The flexibility of the AgNW is also excellent, and the resistance increase of the AgNW is only 2.58% when the AgNW bending about 1000 times with a bending radius of 1 mm. Investigation of temperature dependence of electrical resistivity, thermal conductivity and Lorenz number of silver nanowire, and design of a thermometer.
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影响因子：
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