nanotube films
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2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Yohei Yomogida ◽  
Kanako Horiuchi ◽  
Ryotaro Okada ◽  
Hideki Kawai ◽  
Yota Ichinose ◽  
...  

AbstractThe presence of hopping carriers and grain boundaries can sometimes lead to anomalous carrier types and density overestimation in Hall-effect measurements. Previous Hall-effect studies on carbon nanotube films reported unreasonably large carrier densities without independent assessments of the carrier types and densities. Here, we have systematically investigated the validity of Hall-effect results for a series of metallic, semiconducting, and metal–semiconductor-mixed single-wall carbon nanotube films. With carrier densities controlled through applied gate voltages, we were able to observe the Hall effect both in the n- and p-type regions, detecting opposite signs in the Hall coefficient. By comparing the obtained carrier types and densities against values derived from simultaneous field-effect-transistor measurements, we found that, while the Hall carrier types were always correct, the Hall carrier densities were overestimated by up to four orders of magnitude. This significant overestimation indicates that thin films of one-dimensional SWCNTs are quite different from conventional hopping transport systems.


2022 ◽  
Vol 213 ◽  
pp. 110310
Author(s):  
Karolina Z. Milowska ◽  
Maciej Krzywiecki ◽  
Mike C. Payne ◽  
Dawid Janas

2022 ◽  
Vol 890 ◽  
pp. 161895
Author(s):  
Wencheng Wang ◽  
Zhengxian Yang ◽  
Guyuan Li ◽  
Yong Zhang ◽  
Wangcheng Cao ◽  
...  

2021 ◽  
Vol 2086 (1) ◽  
pp. 012149
Author(s):  
S Komrakova ◽  
P An ◽  
V Kovalyuk ◽  
A Golikov ◽  
Y Gladush ◽  
...  

Abstract Here, thermo-optical properties of hybrid nanophotonic circuits SWCNTs/SiN were investigated by studying the temperature dependence of the resonance wavelengths. After experimental and theoretical study, we found the thermo-optical coefficient of SWCNTs film is equal to 2.02 10-6 RIU/0C.


Carbon ◽  
2021 ◽  
Author(s):  
Hang Zhan ◽  
Yu Wen Chen ◽  
Qiang Qiang Shi ◽  
Yu Zhang ◽  
Run Wei Mo ◽  
...  

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