arXiv: Applied Physics最新文献_第5页

Characterization of Anomalous Forces in Dielectric Rotors 介电转子异常力的表征

arXiv: Applied Physics Pub Date : 2020-09-22 DOI: 10.1139/CJP-2020-0570

E. Porcelli, V. S. Filho

引用次数: 0

Surface adhesion of back-illuminated ultrafast laser-treated polymers 背照超快激光处理聚合物的表面附着力

arXiv: Applied Physics Pub Date : 2020-09-22 DOI: 10.1103/PhysRevMaterials.5.045201

D. Kallepalli, Alan T. K. Godfrey, Jesse Ratté, A. Staudte, Chunmei Zhang, P. Corkum

引用次数: 0

A numerical fitting routine for frequency-domain thermoreflectance measurements of nanoscale material systems having arbitrary geometries 具有任意几何形状的纳米级材料系统的频域热反射测量的数值拟合程序

arXiv: Applied Physics Pub Date : 2020-09-21 DOI: 10.1063/5.0030168

R. Warzoha, Adam A. Wilson, Brian F. Donovan, A. Smith, N. Vu, Trent Perry, Longnan Li, N. Miljkovic, E. Getto

{"title":"A numerical fitting routine for frequency-domain thermoreflectance measurements of nanoscale material systems having arbitrary geometries","authors":"R. Warzoha, Adam A. Wilson, Brian F. Donovan, A. Smith, N. Vu, Trent Perry, Longnan Li, N. Miljkovic, E. Getto","doi":"10.1063/5.0030168","DOIUrl":"https://doi.org/10.1063/5.0030168","url":null,"abstract":"In this work, we develop a numerical fitting routine to extract multiple thermal parameters using frequency-domain thermoreflectance (FDTR) for materials having non-standard, non-semi-infinite geometries. The numerical fitting routine is predicated on either a 2-D or 3-D finite element analysis that permits the inclusion of non semi-infinite boundary conditions, which can not be considered in the analytical solution to the heat diffusion equation in the frequency domain. We validate the fitting routine by comparing it to the analytical solution to the heat diffusion equation used within the wider literature for FDTR and known values of thermal conductivity for semi-infinite substrates (SiO2, Al2O3 and Si). We then demonstrate its capacity to extract the thermal properties of Si when etched into micropillars that have radii on the order of the pump beam. Experimental measurements of Si micropillars with circular cross-sections are provided and fit using the numerical fitting routine established as part of this work. Likewise, we show that the analytical solution is unsuitable for the extraction of thermal properties when the geometry deviates significantly from the standard semi-infinite case. This work is critical for measuring the thermal properties of materials having arbitrary geometries, including ultra-drawn glass fibers and laser gain media.","PeriodicalId":8423,"journal":{"name":"arXiv: Applied Physics","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86549803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Shape-shifting panel from 3D printed undulated ribbon lattice 由3D打印起伏带晶格制成的可变形面板

arXiv: Applied Physics Pub Date : 2020-09-21 DOI: 10.1016/J.EML.2020.101089

Filippo Agnelli, M. Tricarico, A. Constantinescu

引用次数: 5

Fully printed, all-carbon, recyclable electronics 全印刷，全碳，可回收的电子产品

arXiv: Applied Physics Pub Date : 2020-09-21 DOI: 10.21203/rs.3.rs-74355/v1

Nicholas X. Williams, George Bullard, N. Brooke, M. Therien, A. Franklin

{"title":"Fully printed, all-carbon, recyclable electronics","authors":"Nicholas X. Williams, George Bullard, N. Brooke, M. Therien, A. Franklin","doi":"10.21203/rs.3.rs-74355/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-74355/v1","url":null,"abstract":"\u0000 The rapid growth of electronic waste must be curtailed to prevent accumulation of environmentally and biologically toxic materials, which are essential to traditional electronics1. The recent proliferation of transient electronics has focused predominantly on biocompatibility(2,3), and studies reporting material recapture have only demonstrated reuse of conducting materials(4–6). Meanwhile, the ideal solution to the electronic waste epidemic — recapture and reuse of all materials — has been largely neglected. Here we show complete recyclability of all materials in printed, all-carbon electronics using paper substrates, semiconducting carbon nanotubes, conducting graphene, and insulating crystalline nanocellulose. The addition of mobile ions to the dielectric produced significant improvements in switching speed, subthreshold swing, and among the highest on-current for printed transistors. These devices evinced superlative stability over 6 months, after which they are shown to be controllably decomposed for complete recycling of materials and re-printing of devices with similar performance to baseline devices. The printing of all-carbon, recyclable electronics presents a new path toward green electronics with potential to mitigate the environmental impact of electronic waste. We anticipate all-carbon, recyclable electronics to be a watershed, facilitating internet-of-everything applications, such as ubiquitous sensors for continuous monitoring of diseases or environmental conditions, while preserving carbon neutrality in the device lifecycle.","PeriodicalId":8423,"journal":{"name":"arXiv: Applied Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78855650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Assessment of Physical Properties of Water Repellent Soils 拒水土壤物理特性的评价

arXiv: Applied Physics Pub Date : 2020-09-20 DOI: 10.1061/(ASCE)GT.1943-5606.0002604

M. Movasat, I. Tomac

{"title":"Assessment of Physical Properties of Water Repellent Soils","authors":"M. Movasat, I. Tomac","doi":"10.1061/(ASCE)GT.1943-5606.0002604","DOIUrl":"https://doi.org/10.1061/(ASCE)GT.1943-5606.0002604","url":null,"abstract":"This note presents a comprehensive characterization of physical and mechanical properties of water repellent (hydrophobic) soil collected from Cleveland National Forest in California immediately after the Holy Fire, 2018, and delineates comparisons with chemically induced hydrophobic sand in the laboratory. Hydrophobicity is a particle surface characteristic that governs different levels of attraction between water molecules and solid particles. Wildfires can cause different levels of hydrophobicity in shallow soil layers based on fire severity, vegetation, and chemical structure of the soil. Natural and chemically induced regular and hydrophobic sands are characterized by grain size distribution, water retention curve, water contact angle and electron microscopic imaging, including the relationship between water entry value and the drop contact angle in hydrophobic soil. Comparative knowledge of natural and chemically induced hydrophobic soil properties will help future research to better predict soil behavior and improve insights into post-wildfire soil erosion and mudflow mechanisms. This note contributes to a database of wildfire-induced hydrophobic soil with detailed properties and assesses the applicability of laboratory made hydrophobic soils for studying mudflows by comparison to the natural water repellent soil collected from the burned site.","PeriodicalId":8423,"journal":{"name":"arXiv: Applied Physics","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81544898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Microwave Photonic Ising Machine 微波光子成像机

arXiv: Applied Physics Pub Date : 2020-09-19 DOI: 10.21203/rs.3.rs-79539/v1

Qizhuang Cen, Tengfei Hao, Hao Ding, Shanhong Guan, Zhiqiang Qin, Kun Xu, Yitang Dai, Ming Li

引用次数: 9

Interference of co-propagating Rayleigh and Sezawa waves observed with micro-focused Brillouin light scattering spectroscopy 用微聚焦布里渊光散射光谱观察共传播瑞利波和塞泽波的干涉

arXiv: Applied Physics Pub Date : 2020-09-10 DOI: 10.1063/5.0029308

M. Geilen, F. Kohl, A. Nicoloiu, A. Müller, B. Hillebrands, P. Pirro

{"title":"Interference of co-propagating Rayleigh and Sezawa waves observed with micro-focused Brillouin light scattering spectroscopy","authors":"M. Geilen, F. Kohl, A. Nicoloiu, A. Müller, B. Hillebrands, P. Pirro","doi":"10.1063/5.0029308","DOIUrl":"https://doi.org/10.1063/5.0029308","url":null,"abstract":"We use micro-focussed Brillouin light scattering spectroscopy ($mu$BLS) to investigate surface acoustic waves (SAWs) in a GaN layer on a Si substrate at GHz frequencies. Furthermore, we discuss the concept of $mu$BLS for SAWs and show that the crucial parameters of SAW excitation and propagation can be measured. We investigate a broad range of excitation parameters and observe that Rayleigh and Sezawa waves are excited simultaneously at the same frequency. Spatially resolved measurements of these co-propagating waves show a periodic pattern, which proves their coherent interference. From the periodicity of the spatial phonon patterns, the wavevector difference between the two waves has been identified and compared to the dispersion relation. This concept of co-propagating phonons might be used to produce acoustic or magneto-elastic fields with a time-independent spatial variation similar to the situations realized using counter-propagating waves. However, co-propagating SAW have a well defined direction of the wave vector and thus, posses a finite phonon angular momentum which offers new opportunities, e.g. for angular momentum conversion experiments.","PeriodicalId":8423,"journal":{"name":"arXiv: Applied Physics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87476910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Video: ON SECONDARY ATOMIZATION AND BLOCKAGE OF SURROGATE COUGH DROPLETS IN SINGLE AND MULTI-LAYER FACE MASKS 视频:单层和多层口罩中替代咳嗽飞沫的二次雾化和阻塞

arXiv: Applied Physics Pub Date : 2020-09-04 DOI: 10.1103/aps.dfd.2020.gfm.v0059

Shubham Sharma, Roven Pinto, A. Saha, Swetaprovo Chaudhuri, S. Basu

{"title":"Video: ON SECONDARY ATOMIZATION AND BLOCKAGE OF SURROGATE COUGH DROPLETS IN SINGLE AND MULTI-LAYER FACE MASKS","authors":"Shubham Sharma, Roven Pinto, A. Saha, Swetaprovo Chaudhuri, S. Basu","doi":"10.1103/aps.dfd.2020.gfm.v0059","DOIUrl":"https://doi.org/10.1103/aps.dfd.2020.gfm.v0059","url":null,"abstract":"By now it is well-understood that the usage of facemasks provides protection from transmission of viral loads through exhalation and inhalation of respiratory droplets. Therefore, during the current Covid-19 pandemic the usage of face masks is strongly recommended by health officials. Although three-layer masks are generally advised for usage, many commonly available or homemade masks contain only single and double layers. In this study, we show through detailed physics based analyses and high speed imaging that high momentum cough droplets on impingement on single- and double-layer masks can lead to significant partial penetration and more importantly atomization into numerous much smaller daughter droplets, thereby increasing the total population of the aerosol, which can remain suspended for a longer time. The possibility of secondary atomization of high momentum cough droplets due to impingement, hydrodynamic focusing and extrusion through the microscale pores in the fibrous network of the mask has not been explored before. However, this unique mode of aerosol generation poses a finite risk of infection as shown in this work. We also demonstrate that in single layer masks close to 70 % of a given droplet volume is atomized and only 30 % is trapped within the fibers. The entrapped volume is close to 90 % for double layer masks which still allows some atomization into smaller droplets. We however found that a triple-layer surgical mask permits negligible penetration and hence should be effective in preventing disease transmission.","PeriodicalId":8423,"journal":{"name":"arXiv: Applied Physics","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90610709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Thermal Effects in Spin-Torque Switching of Perpendicular Magnetic Tunnel Junctions at Cryogenic Temperatures 低温下垂直磁隧道结自旋转矩开关的热效应

arXiv: Applied Physics Pub Date : 2020-09-03 DOI: 10.1103/PHYSREVAPPLIED.15.034088

L. Rehm, G. Wolf, B. Kardasz, Egecan Cogulu, Yizhang Chen, M. Pinarbasi, A. Kent

引用次数: 3