Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of Porous Alumina Membranes on Silicon Substrates
2.2. Low Crystallinity Carbon Nanotubes Synthesis
2.3. Deposition of the Top Electrode
2.4. Characterizations
2.5. Electric Transport Measurements as a Function of Temperature
2.6. Room Temperature Resistance Measurements in Different Atmospheres
3. Results and discussions
3.1. Morphological and Structural Characterization
3.2. Study of Conductance as a Function of Temperature
3.3. Gas Sensing Measurements
3.4. Electrical Characterization of the LC-CNTs/Si Junction
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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w (nm) | T0 (K) | Gh (S/m2) | Gm (S/m2) |
---|---|---|---|
0.7 ± 0.4 | 8.6 ± 0.2 × 107 | 6.0 ± 0.9 × 109 | 1.0 ± 0.1 × 10−4 |
1.1 ± 0.4 | 7.1 ± 0.2 × 107 | 1.0 ± 0.1 × 1010 | 1.1 ± 0.1 × 10−2 |
1.9 ± 0.4 | 1.8 ± 0.1 × 106 | 2.4 ± 0.3 × 104 | 3.0 ± 0.3 × 10−2 |
3.2 ± 0.4 | 2.4 ± 0.1 × 105 | 1.6 ± 0.1 × 103 | 2.1 ± 0.2 × 10−2 |
w (nm) | H2 Max. Resp. (%) | C2H2 Max. Resp. (%) | Conductance/Area (S/m2) |
---|---|---|---|
0.3 ± 0.4 | 0 | 0 | 2.41 ± 0.02 × 10−3 |
0.4 ± 0.4 | 2.7 ± 0.1 | 5.2 ± 0.1 | 1.62 ± 0.01 × 10−1 |
0.7 ± 0.4 | 1.0 ± 0.2 | 5.7 ± 0.1 | 1.94 ± 0.02 × 10−1 |
1.1 ± 0.4 | 0.4 ± 0.2 | 1.3 ± 0.2 | 2.00 ± 0.02 × 100 |
1.9 ± 0.4 | 0 | 2.2 ± 0.2 | 2.90 ± 0.03 × 100 |
3.2 ± 0.4 | 0 | 0 | 6.83 ± 0.07 × 100 |
w (nm) | n | Rp (Ω) | Rs (Ω) | Is (nA) | SC (%) | A (m2) | ϕB (eV) |
---|---|---|---|---|---|---|---|
0.4 ± 0.4 | 1.09 ± 0.01 | 11226 ± 171 | 1093 ± 16 | 0.11 ± 0.18 | >91 | 5.5 × 10−8 | 0.34 ± 0.04 |
0.7 ± 0.4 | 1.00 ± 0.01 | 5019 ± 106 | 1110 ± 28 | 0.13 ± 0.54 | >82 | 9.0 × 10−8 | 0.35 ± 0.11 |
1.1 ± 0.4 | 1.05 ± 0.01 | 3891 ± 36 | 872 ± 14 | 0.13 ± 0.26 | >82 | 1.4 × 10−7 | 0.36 ± 0.05 |
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Adrian, A.R.; Cerda, D.; Fernández-Izquierdo, L.; Segura, R.A.; García-Merino, J.A.; Hevia, S.A. Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing. Nanomaterials 2021, 11, 3040. https://doi.org/10.3390/nano11113040
Adrian AR, Cerda D, Fernández-Izquierdo L, Segura RA, García-Merino JA, Hevia SA. Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing. Nanomaterials. 2021; 11(11):3040. https://doi.org/10.3390/nano11113040
Chicago/Turabian StyleAdrian, Alvaro R., Daniel Cerda, Leunam Fernández-Izquierdo, Rodrigo A. Segura, José Antonio García-Merino, and Samuel A. Hevia. 2021. "Tunable Low Crystallinity Carbon Nanotubes/Silicon Schottky Junction Arrays and Their Potential Application for Gas Sensing" Nanomaterials 11, no. 11: 3040. https://doi.org/10.3390/nano11113040