최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, v.41 no.5 = no.380, 2017년, pp.341 - 346
Knowing the mean free paths (MFPs) of thermal phonons is an essential step in performing heat transfer analysis for nanomaterials, and in determining the optimum design for tailoring the heat transfer characteristics of nanomaterials. In this study, we present a method that can be used to calculate ...
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
반도체 및 절연체의 주요에너지 전달체는 무엇인가? | 반도체 및 절연체(dielectric) 내 주요 에너지 전달체(carrier)는 포논(phonon)이며, 포논은 결정체(crystal) 격자(lattice)의 열을 전달하는 양자화된 진동 형태를 갖는다. (1~5) 이러한 포논 전달특성 연구는 나노시스템 효율을 높이기 위한 설계 및 열전달 물리를 이해하는데 매우 중요하다. | |
벌리스틱 포논 전달특성 이해가 나노시스템설계에 중요한 이유는 무엇인가? | (1~7) 특히, 나노제작기술(nano-fabrication technology)의 발달에 힘입어 시스템 특성길이가 수 nm~수십 nm에 이르는 점(dot), 선(wire), 박막(thin film) 등 다양한 형태의 나노재료 제작 및 활용이 가능해졌다. (4~6) 포논의 평균자유행로(mean free path, MFP)와 시스템 길이가 비슷하거나 작아지면, 크기 효과(size effect)에 의해 열전달 메커니즘이 확산(diffuse)이 아닌 벌리 스틱(ballistic) 포논 전달 현상이 되며, 포논-경계산란(scattering)이 중요해 진다. (8~14) 이러한 벌리스틱 포논 전달특성 이해는 나노 시스템의 효율 향상 설계에 매우 중요하다. | |
나노제작기술로 인해서 무엇이 가능해졌는가? | (1~5) 이러한 포논 전달특성 연구는 나노시스템 효율을 높이기 위한 설계 및 열전달 물리를 이해하는데 매우 중요하다. (1~7) 특히, 나노제작기술(nano-fabrication technology)의 발달에 힘입어 시스템 특성길이가 수 nm~수십 nm에 이르는 점(dot), 선(wire), 박막(thin film) 등 다양한 형태의 나노재료 제작 및 활용이 가능해졌다. (4~6) 포논의 평균자유행로(mean free path, MFP)와 시스템 길이가 비슷하거나 작아지면, 크기 효과(size effect)에 의해 열전달 메커니즘이 확산(diffuse)이 아닌 벌리 스틱(ballistic) 포논 전달 현상이 되며, 포논-경계산란(scattering)이 중요해 진다. |
Tien, C. L., Majumdar, A. and Gerner, F. M., 1998, MICROSCALE ENERGY TRANSPORT, Taylor & Francis, Washington D. C., pp. 3-94.
Chen, G., 2005, Nanoscale Energy Transport and Conversion, Oxford University Press, New York.
Zhang, Z. M., 2007, Nano/Microscale Heat Transfer, Mc Graw Hill, New York, pp. 162-182.
Kim, W., 2015, "Strategies for Engineering Phonon Transport in Thermoelectrics," Journal of Materials Chemistry C, Vol. 3, No. 10, pp. 10336-10348.
Minnich, A. J., 2015, "Advances in the Measurement and Computation of Thermal Phonon Transport Properties," Journal of Physics: Condensed Matter, Vol. 27, No. 5, Paper Number 053202.
Jin, J. S., 2016, "Direct Determination of Spectral Phonon-Surface Scattering Rate from Experimental Data on Spectral Phonon Mean Free Path Distribution," Trans. Korean Soc. Mech. Eng. B, Vol. 40, No. 9, pp. 621-627.
Siemens, M. E., Li, Q., Yang, R., Nelson, K. A., Anderson, E. H., Murnane, M, M. and Kapteyn, H. C., 2010, "Quasi-ballistic Thermal Transport from Nanoscale Interfaces Observed using Ultrafast Coherent Soft X-ray Beams," Nature Materials, Vol. 9, No. 1, pp. 26-30.
Maznev, A. A., Johnson, J. A. and Nelson, K. A., 2011, "Onset of Nondiffusive Phonon Transport in Transient Thermal Grating Decay," Physical Review B, Vol. 84, No. 19, Paper Number 195206.
Minnich, A. J., Chen, G., Mansoor, S. and Yilbas, B. S., 2011, "Quasiballistic Heat Transfer Studied using the Frequency-dependent Boltzmann Transport Equation," Physical Review B, Vol. 84, No. 23, Paper Number 235207.
Collins, K. C., Maznev, A. A., Tian, Z., Esfarjani, K., Nelson, K. A. and Chen, G., 2013, "Non-diffusive Relaxation of a Transient Thermal Grating Analyzed with the Boltzmann Transport Equation," Journal of Applied Physics, Vol. 114, No. 10, Paper Number 104302.
Minnich, A. J., Johnson, J. A., Schmidt, A. J., Esfarjani, K., Dresselhaus, M. S., Nelson, K. A. and Chen, G., 2011, "Thermal Conductivity Spectroscopy Technique to Measure Phonon Mean Free Paths," Physical Review Letters, Vol. 107, No. 9, Paper Number 095901.
Minnich, A. J., 2012, "Determining Phonon Mean Free Paths from Observations of Quasiballistic Thermal Transport," Physical Review Letters, Vol. 109, No. 20, Paper Number 205901.
Johnson, J. A., Maznev, A. A., Cuffe, J., Eliason, J. K., Minnich, A. J., Kehoe, T., Torres, C. M. S., Chen, G. and Nelson, K. A., 2013, "Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane," Physical Review Letters, Vol. 110, No. 2, Paper Number 025901.
Wang, X. and Huang, B., 2014, "Computational Study of In-Plane Phonon Transport in Si Thin Films," Scientific Reports, Vol. 4, Paper Number 6399.
Feng, T. and Ruan, X., 2014, "Prediction of Spectral Phonon Mean Free Path and Thermal Conductivity with Applications to Thermoelectrics and Thermal Management: A Review," Journal of Nanomaterials, Vol. 2014, Paper Number 206370.
Maznev, A. A., 2013, "Onset of Size Effect in Lattice Thermal Conductivity of Thin Films," Journal of Applied Physics, Vol. 113, No. 11, Paper Number 113511.
Jiang, P., Lindsay, L. and Koh, Y. K., 2016, "Role of Low-energy Phonons with Mean-free-paths $>0.8{\mu}m $ in Heat Conduction in Silicon," Journal of Applied Physics, Vol. 119, No. 24, Paper Number 245705.
Esfarjani, K., Chen, G. and Stokes, H. T., 2011, "Heat Transport in Silicon from First-principles Calculations," Physical Review B, Vol. 84, No. 8, Paper Number 085204.
Shiga, T., Aketo, D., Feng, L. and Shiomi, J., 2016, "Harmonic Phonon Theory for Calculating Thermal Conductivity Spectrum from First-principles Dispersion Relations," Applied Physics Letters, Vol. 108, No. 20, Paper Number 201903.
Narumanchi, S. V. J., Murthy, J. Y. and Amon, C. H., 2004, "Submicron Heat Transfer Model in Silicon Accounting for Phonon Dispersion and Polarization," ASME Journal of Heat Transfer, Vol. 126, No. 6, pp. 946-955.
Hua, C. and Minnich, A. J., 2015, "Semi-analytical Solution to the Frequency-dependent Boltzmann Transport Equation for Cross-plane Heat Conduction in Thin Films," Journal of Applied Physics, Vol. 117, No. 17, Paper Number 175306.
Lee, J., Lim, J. and Yang, P., 2015, "Ballistic Phonon Transport in Holey Silicon Nano Letters," Vol. 15, No. 5, pp. 3273-3279.
Mittal, A. and Mazumder, S., 2010, "Monte Carlo Study of Phonon Heat Conduction in Silicon Thin Films Including Contributions of Optical Phonons," ASME Journal of Heat Transfer, Vol. 132, No. 5, Paper Number 052402.
Pop, E., Dutton, R. W. and Goodson, K. E., 2005, "Monte Carlo Simulation of Joule Heating in Bulk and Strained Silicon," Applied Physics Letters, Vol. 86, No. 8, Paper Number 082101.
Romano, G. and Grossman, J. C., 2015, "Heat Conduction in Nanostructured Materials Predicted by Phonon Bulk Mean Free Path Distribution," ASME Journal of Heat Transfer, Vol. 137, No. 7, Paper Number 071302.
Yang, F. and Dames, C., 2013, "Mean Free Path Spectra as a Tool to Understand Thermal Conductivity in Bulk and Nanostructures," Physical Review B, Vol. 87, No. 3, Paper Number 035437.
Cuffe, J., Eliason, J. K., Maznev, A. A., Collins, K. C., Johnson, J. A., Shchepetov, A., Prunnila, M., Ahopelto, J., Torres, C. M. S., Chen, G. and Nelson, K. A., 2015, "Reconstructing Phonon Mean-free-path Contributions to Thermal Conductivity using Nanoscale Membranes," Physical Review B, Vol. 91, No. 24, Paper Number 245423.
Duda, J. C., Beechem, T. E., Smoyer, J. L., Norris, P. M. and Hopkins, P. E., 2010, "Role of Dispersion on Phononic Thermal Boundary Conductance," Journal of Applied Physics, Vol. 108, No. 7, Paper Number 073515.
Jain, A., Yu, Y.-J. and McGaughey, A. J. H., 2013, "Phonon Transport in Periodic Silicon Nanoporous Films with Feature Sizes Greater Than 100 nm," Physical Review B, Vol. 87, No. 19, Paper Number 195301.
Kremera, R. K., Grafa, K., Cardonaa, M., Devyatykh, G. G., Gusevb, A. V., Gibin, A. M., Inyushkinc, A. V., Taldenkovc, A. N. and Pohl, H.-J., 2004, "Thermal Conductivity of Isotopically Enriched 28Si: Revisited," Solid State Communications, Vol. 131, No. 8, pp. 499-503.
*원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.