Abstract
This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 270-276 |
| Number of pages | 7 |
| Journal | Vibrational Spectroscopy |
| Volume | 86 |
| DOIs | |
| State | Published - Sep 1 2016 |
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All Science Journal Classification (ASJC) codes
- Spectroscopy
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Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films. / Vieira, Anderson G.; Luz-Lima, Cleanio; Pinheiro, Gardenia S.; Lin, Zhong; Rodríguez-Manzo, Julio A.; Perea Lopez, Nestor; Elias Arriaga, Ana Laura; Drndić, Marija; Terrones Maldonado, Mauricio; Terrones, Humberto; Viana, Bartolomeu C.
In: Vibrational Spectroscopy, Vol. 86, 01.09.2016, p. 270-276.Research output: Contribution to journal › Article
TY - JOUR
T1 - Temperature- and power-dependent phonon properties of suspended continuous WS2 monolayer films
AU - Vieira, Anderson G.
AU - Luz-Lima, Cleanio
AU - Pinheiro, Gardenia S.
AU - Lin, Zhong
AU - Rodríguez-Manzo, Julio A.
AU - Perea Lopez, Nestor
AU - Elias Arriaga, Ana Laura
AU - Drndić, Marija
AU - Terrones Maldonado, Mauricio
AU - Terrones, Humberto
AU - Viana, Bartolomeu C.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.
AB - This manuscript reports temperature- and power-dependence of in-plane E1 2g and out-of-plane A1g Raman modes in a continuous WS2 monolayer film (CWMF) prepared using low pressure chemical vapor deposition (LPCVD), suspended on a perforated substrate. The frequencies of these two phonon modes vary linearly with temperature (77–523 K) and power (2–14 μW), and the modes soften as local temperature increases. The first-order temperature coefficients for E1 2g and A1g modes are 0.0124 and 0.0112 cm−1/K, respectively, and power coefficients are 0.1228 and 0.1381 cm−1/μW. Using the 1D Balandin's approach, we have calculated the thermal conductivity of the suspended CWMF at room temperature to be ca. 20 and 16 W/mK when considering the E1 2g and A1g modes, respectively. Our results provide thermal properties values of CWMF, which are very important for developing monolayer WS2 electronic devices.
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U2 - 10.1016/j.vibspec.2016.08.004
DO - 10.1016/j.vibspec.2016.08.004
M3 - Article
VL - 86
SP - 270
EP - 276
JO - Vibrational Spectroscopy
JF - Vibrational Spectroscopy
SN - 0924-2031
ER -