2005 International Conference on MEMS,NANO and Smart Systems最新文献_第4页

Finite temperature multiscale computational modeling of materials at nanoscale 纳米尺度材料的有限温度多尺度计算模型

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.52

B. Shiari, Ronald E. Miller, D. Klug

引用次数: 6

A method for crack detection in structures using piezoelectric sensors and actuators 基于压电传感器和致动器的结构裂纹检测方法

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.1

Yong Han, A. Misra, D. Mateescu

引用次数: 8

A variational approach to microneedle design 微针设计的变分方法

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.20

P. Vasquez, J. Pelesko

引用次数: 5

Molecular dynamics simulation of the rupture of nanometer-sized oil/water interface 纳米油水界面破裂的分子动力学模拟

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.78

Tetyana Segin, J. Masliyah, S. Bhattacharjee

{"title":"Molecular dynamics simulation of the rupture of nanometer-sized oil/water interface","authors":"Tetyana Segin, J. Masliyah, S. Bhattacharjee","doi":"10.1109/ICMENS.2005.78","DOIUrl":"https://doi.org/10.1109/ICMENS.2005.78","url":null,"abstract":"Molecular dynamics simulations are carried out to study formation and stability of nanometer thick films of heptane in water. It is considered as a representative model of oil films in aqueous media during deemulsification of water droplets in diluted oil. The simulations are performed using the Gromacs freeware employing the Gromos96 force field. The simulations are conducted assuming simple point charge (SPC) model of water. Dependent on the system potential energy, the thickness of heptane layer is obtained. The effective Hamaker constant of heptane-water systems calculated from our simulations. Molecular dynamics simulations allow determination of the diffusion coefficients of heptane and water. A good agreement is found between the simulated heptane self-diffusivity and its experimental values. The curvature of the heptane/water interface along with the heptane volume fraction were found to cause rupture of the heptane layer resulting in the formation of cylindrical-shape micelles. The simulations are capable of providing the disjoining pressure isotherms of heptane films in water. It was observed that although the continuum models are sufficiently accurate for such films as long the film thickness is above 3 nm, these models are generally inadequate for thinner films. In such thin films (thickness /spl sim/ 1 nm), the heptane layer tends to become \"permeable\" and water molecules tend to diffuse across the heptane layer causing a rupture of the film.","PeriodicalId":185824,"journal":{"name":"2005 International Conference on MEMS,NANO and Smart Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125506603","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: 0

Instability of submicron anisotropic liquid cylinders and jets in magnetic field 亚微米各向异性液体缸和射流在磁场中的不稳定性

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.62

Y. Zimmels, L. Fel

引用次数: 0

Role of patterned surface charge heterogeneity on particle deposition 图案表面电荷不均一性在粒子沉积中的作用

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.106

Neda Nazemifard, J. Masliyah, S. Bhattacharjee

{"title":"Role of patterned surface charge heterogeneity on particle deposition","authors":"Neda Nazemifard, J. Masliyah, S. Bhattacharjee","doi":"10.1109/ICMENS.2005.106","DOIUrl":"https://doi.org/10.1109/ICMENS.2005.106","url":null,"abstract":"A finite element analysis of the fluid flow and the colloidal particle transport equations near a micropatterned charged substrate under radial impinging jet flow conditions is presented to investigate the charge heterogeneity effects on particle deposition. The particle Sherwood number representing the dimensionless particle deposition flux is obtained as a function of the radial distance from the stagnation point. The charge heterogeneity is modeled as concentric bands bearing positive and negative charges on the substrate. When a negatively-charged particle approaches such a charge heterogeneous substrate, it experiences an alternating attractive and repulsive force due to the presence of different charges on the substrate. Consequently, as the particle moves radially outward from the stagnation point, it experiences a periodic array of favorable (attractive) and unfavorable (repulsive) regions on the substrate, giving rise to an oscillatory trajectory. The numerical results obtained from the finite element model are in excellent agreement with existing theoretical and experimental values of deposition rates on homogeneous collector surfaces. However, the results for particle deposition over a heterogeneous substrate depict a significant deviation from those predicted by the patchwise heterogeneity model due to the coupled influence of hydrodynamic interactions and the surface chemical heterogeneity of the collector. The particles that do not deposit over an unfavorable repulsive band are convected to the next favorable band by the tangential velocity. This increases the particle concentration at the leading edge of each favorable band resulting in an increase in particle deposition over the favorable bands and the overall deposition rate on to the collector. Application of this phenomenon will be discussed in context of developing micropatterned surfaces with engineered particle capture properties.","PeriodicalId":185824,"journal":{"name":"2005 International Conference on MEMS,NANO and Smart Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130624502","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: 0

ANN modeling of micro-machined gas sensor signals 微机械气体传感器信号的神经网络建模

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.27

M. G. El-Din, W. Moussa

引用次数: 1

Nonlinear dynamics in nanomechanical oscillators 纳米机械振荡器的非线性动力学

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.88

S. Zaitsev, R. Almog, O. Shtempluck, E. Buks

引用次数: 14

Characterization and analysis of vertically comb-driven micromirrors 垂直梳状驱动微镜的特性与分析

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.34

Hsing-Yi Chung, Rongshun Chen

{"title":"Characterization and analysis of vertically comb-driven micromirrors","authors":"Hsing-Yi Chung, Rongshun Chen","doi":"10.1109/ICMENS.2005.34","DOIUrl":"https://doi.org/10.1109/ICMENS.2005.34","url":null,"abstract":"Because of their simple structure, IC compatibility, and large force output per unit energy, electrostatic micromirrors have been widely used in displays, barcode scanning, optical switches, endoscopes and so on. Among the electrostatic micromirrors, vertically comb-driven micromirrors have drawn more attention recently, due to low driving voltage for achieving large angular motion, lower abrasion consumption, and less pull-in effect. However, the existence of dimensional uncertainty due to the fabrication imperfection, the electrostatic-structural coupling effect, and the nonlinearly dynamical behavior of the vertically comb-driven micromirrors result in that the devices cannot be precisely characterized and well analyzed. Consequently, the applications of the devices may be limited because of unable to accurately grasp its dynamics. In order to characterize the vertically comb-driven micromirror, this paper analyzes the dynamics and the mechanical properties, including its damping ratio, stiffness, and resonant frequency. For verification, the finite element software (ANSYS) was employed to perform the simulation. ANSYS and CoventorWare software were used and experiments were conducted to verify the results.","PeriodicalId":185824,"journal":{"name":"2005 International Conference on MEMS,NANO and Smart Systems","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128465734","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

The implementation of fuzzy-based path planning for car-like mobile robot 基于模糊的类车移动机器人路径规划实现

2005 International Conference on MEMS,NANO and Smart Systems Pub Date : 2005-07-24 DOI: 10.1109/ICMENS.2005.119

Hung-Ching Lu, Chih-Ying Chuang

引用次数: 15