Name: microparticle manipulation by standing surface acoustic waves with dual-frequency excitations
Uploaded: 2018-08-21T14:30:00
Description: Watch this Scientific Journal Video about Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations at JoVE.com

这项工作由新加坡教育部学术研究基金 (AcRF) 1 层 (RG171/15) 主办。

1. 微流控通道的制备
<ol><li>混合甲基 () 与弹性体基础的比例为10:1。</li>
	<li>将混合物放入真空烤箱中, 将其倒在硅晶片上, 上面有一个负色调的光刻胶图案。</li>
	<li>再次德加的图案硅晶片, 并加热它在70°c 3 小时, 在一个孵化器凝固。</li>
</ol>2. 叉指变换器的制作
<ol><li>在吴林波3晶片上沉积 20 nm 铬和 400 nm 的铝;图案20条, 宽度为150µm, 在塑料面罩上的光圈为2厘米, 通过?...

<ol>
	<li>Chin, C. D., Linder, V., Sia, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Commercialization+of+microfluidic+point-of-care+diagnostic+devices.">Commercialization of microfluidic point-of-care diagnostic devices.</a> Lab on a Chip. 12 (12), 2118-2134 (2012).</li><li>Figeys, D., Pinto, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lab-on-a-chip:+a+revolution+in+biological+and+medical+sciences.">Lab-on-a-chip: a revolution in biological and medical sciences.</a> Analytical Chemistry. 72 (9), 330 A-335 A (2000).</li><li>den Toonder, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Circulating+tumor+cells:+the+Grand+Challenge.">Circulating tumor cells: the Grand Challenge.</a> Lab on a Chip. 11 (3), 375-377 (2011).</li><li>Yu, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Advances+of+lab-on-a-chip+in+isolation,+detection+and+post-processing+of+circulating+tumour+cells.">Advances of lab-on-a-chip in isolation, detection and post-processing of circulating tumour cells.</a> Lab on a Chip. 13 (16), 3163-3182 (2013).</li><li>Jorgenson, J. W., Lukacs, K. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=High-resolution+separations+based+on+electrophoresis+and+electroosmosis.">High-resolution separations based on electrophoresis and electroosmosis.</a> Journal of Chromatography A. 218, 209-216 (1981).</li><li>Gascoyne, P. R., Vykoukal, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Particle+separation+by+dielectrophoresis.">Particle separation by dielectrophoresis.</a> Electrophoresis. 23 (13), 1973 (1973).</li><li>Xia, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Combined+microfluidic-micromagnetic+separation+of+living+cells+in+continuous+flow.">Combined microfluidic-micromagnetic separation of living cells in continuous flow.</a> Biomedical Microdevices. 8 (4), 299-308 (2006).</li><li>Garc&#233;s-Ch&#225;vez, V., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Extended+organization+of+colloidal+microparticles+by+surface+plasmon+polariton+excitation.">Extended organization of colloidal microparticles by surface plasmon polariton excitation.</a> Physical Review B. 73 (8), 085417 (2006).</li><li>Zhu, T., Ye, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Origin+of+Knudsen+forces+on+heated+microbeams.">Origin of Knudsen forces on heated microbeams.</a> Physical Review E. 82 (3), 036308 (2010).</li><li>Ashkin, A., Dziedzic, J., Yamane, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optical+trapping+and+manipulation+of+single+cells+using+infrared+laser+beams.">Optical trapping and manipulation of single cells using infrared laser beams.</a> Nature. 330 (6150), 769-771 (1987).</li><li>Chiou, P. Y., Ohta, A. T., Wu, M. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Massively+parallel+manipulation+of+single+cells+and+microparticles+using+optical+images.">Massively parallel manipulation of single cells and microparticles using optical images.</a> Nature. 436 (7049), 370-372 (2005).</li><li>Yamada, M., Seki, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hydrodynamic+filtration+for+on-chip+particle+concentration+and+classification+utilizing+microfluidics.">Hydrodynamic filtration for on-chip particle concentration and classification utilizing microfluidics.</a> Lab on a Chip. 5 (11), 1233-1239 (2005).</li><li>Burguillos, M. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microchannel+acoustophoresis+does+not+impact+survival+or+function+of+microglia,+leukocytes+or+tumor+cells.">Microchannel acoustophoresis does not impact survival or function of microglia, leukocytes or tumor cells.</a> PLoS One. 8 (5), e64233 (2013).</li><li>Lin, S. -. C. S., Mao, X., Huang, T. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Surface+acoustic+wave+(SAW)+acoustophoresis:+now+and+beyond.">Surface acoustic wave (SAW) acoustophoresis: now and beyond.</a> Lab on a Chip. 12 (16), 2766-2770 (2012).</li><li>Petersson, F., &#197;berg, L., Sw&#228;rd-Nilsson, A. -. M., Laurell, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Free+flow+acoustophoresis:+microfluidic-based+mode+of+particle+and+cell+separation.">Free flow acoustophoresis: microfluidic-based mode of particle and cell separation.</a> Analytical Chemistry. 79 (14), 5117-5123 (2007).</li><li>Ding, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=On-chip+manipulation+of+single+microparticles,+cells,+and+organisms+using+surface+acoustic+waves.">On-chip manipulation of single microparticles, cells, and organisms using surface acoustic waves.</a> Proceedings of the National Academy of Sciences. 109 (28), 11105-11109 (2012).</li><li>Friend, J., Yeo, L. Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microscale+acoustofluidics:+Microfluidics+driven+via+acoustics+and+ultrasonics.">Microscale acoustofluidics: Microfluidics driven via acoustics and ultrasonics.</a> Reviews of Modern Physics. 83 (2), 647 (2011).</li><li>Destgeer, G., Lee, K. H., Jung, J. H., Alazzam, A., Sung, H. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Continuous+separation+of+particles+in+a+PDMS+microfluidic+channel+via+travelling+surface+acoustic+waves+(TSAW).">Continuous separation of particles in a PDMS microfluidic channel via travelling surface acoustic waves (TSAW).</a> Lab on a Chip. 13 (21), 4210-4216 (2013).</li><li>Guo, F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Controlling+cell-cell+interactions+using+surface+acoustic+waves.">Controlling cell-cell interactions using surface acoustic waves.</a> Proceedings of the National Academy of Sciences. 112 (1), 43-48 (2015).</li><li>Ding, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cell+separation+using+tilted-angle+standing+surface+acoustic+waves.">Cell separation using tilted-angle standing surface acoustic waves.</a> Proceedings of the National Academy of Sciences. 111 (36), 12992-12997 (2014).</li><li>Roshchupkin, D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=X-ray+diffraction+by+standing+surface+acoustic+waves.">X-ray diffraction by standing surface acoustic waves.</a> Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 142 (3), 432-436 (1998).</li><li>Shi, J., Mao, X., Ahmed, D., Colletti, A., Huang, T. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Focusing+microparticles+in+a+microfluidic+channel+with+standing+surface+acoustic+waves+(SSAW).">Focusing microparticles in a microfluidic channel with standing surface acoustic waves (SSAW).</a> Lab on a Chip. 8 (2), 221-223 (2008).</li><li>Ding, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Surface+acoustic+wave+microfluidics.">Surface acoustic wave microfluidics.</a> Lab on a Chip. 13 (18), 3626-3649 (2013).</li><li>King, L. V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=On+the+acoustic+radiation+pressure+on+spheres.">On the acoustic radiation pressure on spheres.</a> Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences. , 212-240 (1934).</li><li>Yosioka, K., Kawasima, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Acoustic+radiation+pressure+on+a+compressible+sphere.">Acoustic radiation pressure on a compressible sphere.</a> Acta Acustica United with Acustica. 5 (3), 167-173 (1955).</li><li>Ratier, C., Hoyos, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Acoustic+programming+in+step-split-flow+lateral-transport+thin+fractionation.">Acoustic programming in step-split-flow lateral-transport thin fractionation.</a> Analytical Chemistry. 82 (4), 1318-1325 (2010).</li><li>Mandralis, Z., Feke, D., Bolek, W., Burger, W., Benes, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Enhanced+synchronized+ultrasonic+and+flow-field+fractionation+of+suspensions.">Enhanced synchronized ultrasonic and flow-field fractionation of suspensions.</a> Ultrasonics. 32 (2), 113-122 (1994).</li><li>Laurell, T., Petersson, F., Nilsson, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chip+integrated+strategies+for+acoustic+separation+and+manipulation+of+cells+and+particles.">Chip integrated strategies for acoustic separation and manipulation of cells and particles.</a> Chemical Society Reviews. 36 (3), 492-506 (2007).</li><li>Liu, Y., Lim, K. -. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Particle+separation+in+microfluidics+using+a+switching+ultrasonic+field.">Particle separation in microfluidics using a switching ultrasonic field.</a> Lab on a Chip. 11 (18), 3167-3173 (2011).</li><li>Brissaud, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Characterization+of+piezoceramics.">Characterization of piezoceramics.</a> IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 38 (6), 603-617 (1991).</li><li>Ding, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tunable+patterning+of+microparticles+and+cells+using+standing+surface+acoustic+waves.">Tunable patterning of microparticles and cells using standing surface acoustic waves.</a> Lab on a Chip. 12 (14), 2491-2497 (2012).</li><li>Jo, M. C., Guldiken, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Particle+manipulation+by+phase-shifting+of+surface+acoustic+waves.">Particle manipulation by phase-shifting of surface acoustic waves.</a> Sensors and Actuators A: Physical. 207, 39-42 (2014).</li><li>Meng, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Transportation+of+single+cell+and+microbubbles+by+phase-shift+introduced+to+standing+leaky+surface+acoustic+waves.">Transportation of single cell and microbubbles by phase-shift introduced to standing leaky surface acoustic waves.</a> Biomicrofluidics. 5 (4), 044104 (2011).</li><li>Sriphutkiat, Y., Zhou, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Particle+manipulation+using+standing+surface+acoustic+waves+(SSAW)+at+dual+frequency+excitation:+effect+of+power+ratio.">Particle manipulation using standing surface acoustic waves (SSAW) at dual frequency excitation: effect of power ratio.</a> Sensors and Actuators A: Physical. 263, 521-529 (2017).</li><li>Batchelor, G. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> An Introduction to Fluid Dynamics. , (2000).</li><li>Glynne-Jones, P., Hill, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Acoustofluidics+23:+acoustic+manipulation+combined+with+other+force+fields.">Acoustofluidics 23: acoustic manipulation combined with other force fields.</a> Lab on a Chip. 13 (6), 1003-1010 (2013).</li><li>Winkler, A., Br&#252;nig, R., Faust, C., Weser, R., Schmidt, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Towards+efficient+surface+acoustic+wave+(SAW)-based+microfluidic+actuators.">Towards efficient surface acoustic wave (SAW)-based microfluidic actuators.</a> Sensors and Actuators A: Physical. 247, 259-268 (2016).</li><li>Chen, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Standing+surface+acoustic+wave+(SSAW)-based+microfluidic+cytometer.">Standing surface acoustic wave (SSAW)-based microfluidic cytometer.</a> Lab on a Chip. 14, 916-923 (2014).</li><li>Devendran, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+importance+of+travelling+wave+components+in+standing+surface+acoustic+wave+(SSAW)+systems.">The importance of travelling wave components in standing surface acoustic wave (SSAW) systems.</a> Lab on a Chip. 16, 3756-3766 (2016).</li><li>Destgeer, G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Submicron+separation+of+microspheres+via+travelling+surface+acoustic+waves.">Submicron separation of microspheres via travelling surface acoustic waves.</a> Lab on a Chip. 14, 4665-4672 (2014).</li><li>Ding, X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Standing+surface+acoustic+wave+(SSAW)+based+multichannel+cell+sorting.">Standing surface acoustic wave (SSAW) based multichannel cell sorting.</a> Lab on a Chip. 12, 4228-4231 (2012).</li><li>Chen, Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Continuous+enrichment+of+low-abundance+cell+samples+using+standing+surface+acoustic+waves+(SSAW).">Continuous enrichment of low-abundance cell samples using standing surface acoustic waves (SSAW).</a> Lab on a Chip. 14, 924-930 (2014).</li></ol>

本文研究了双频激励下的螺旋埋弧焊微通道中的微粒运动, 并对双频励磁信号进行了有效的可调谐图形技术的开发和测试。这种波形的产生很容易由大多数函数发生器实现, 调整方法非常方便。12和 s 的11频率响应的捏造 IDTs 说明了几个共振模式34。测量的基本频率为6.1 兆赫和17.8 兆赫的第三次谐波接近那些被设计的价值 (6.2 和18.6 兆赫) 以相似的传输系数,-8.34 </...

在生物、化学、生物物理学和医学过程中, 中控技术将一个或多个功能集成在微芯片上。通量允许实验室设置的规模小于亚毫米, 快速反应速度, 短响应时间, 高过程控制, 低容量消耗 (减少浪费, 较低的试剂成本, 和较少的样品量), 高吞吐量由于并行化, 在未来大规模生产和经济高效的一次性耗材的低成本, 化学, 放射性, 或生物研究的高安全性, 以及紧凑和便携设备1,2的优势。精确的细胞操作 (即积累和分离) 在基于控制的分析和诊断3,4中是至关重要的。然而, 微粒操纵的准确性和重现性有各种各样的挑战。许多技术, 如电渗透5, 介电泳 (DEP)6, magnetophoresis7, thermophoresis8,9, 光学方法10, 光电方法11, 开发了水动力方法12和 acoustophoresis13、14、15。相比之下, 声学方法是适用于一个应用, 因为理论上, 许多类型的微粒/细胞可以有效地操纵和无创性与足够高的对比度 (密度和压缩性) 比较周围的液体。因此, 与它们的对应物相比, 声学方法天生符合大多数微粒和生物物体的条件, 不管它们的光学、电学和磁性特性16。
根据斯内尔定律17, IDTs 的表面声波 (锯) 主要传播在压电基底的表面, 在几个波长的厚度上, 然后在瑞利角向微通道中的流体泄漏. 18,19,20,21,22。由于其能量的定位, 在高频率下具有很好的设计灵活性, 具有良好的微流控通道和小型化的系统集成, 使其在表面上具有高能量效率的技术优势。微电子-机械系统 (MEMS) 技术, 具有很高的大批量生产潜力23。在这个协议中, 锯是由一对相同的 IDTs 产生的, 并以相反的方向传播, 在微通道中产生驻波, 或螺旋弧, 悬浮微粒被推到压力节点, 主要由应用的声学辐射力24。这种合力的振幅由激发频率、微粒大小和声学对比系数22、25决定。
这样的 acoustophoresis 限制了预先设定的操作模式, 而这些方式不易调整。IDTs 的激发频率由它们的周期距离决定, 因此带宽相当有限。为了提高调谐和操纵能力, 开发了一些策略。在微通道的不同部位应用的声驻波的第一和第二模态, 可以根据不同的运动速度将微粒更有效地分离到节点线26。这两种模式也可应用于微通道的整个部分, 并交替切换27、28、29。然而, 为此, 需要大量的设备 (即三个函数发生器、两个阻抗匹配单元和一个电磁继电器), 由于不同的实验装置的成本和控制复杂性的增加,电阻抗在压电陶瓷板的基本频率和第三次谐波30。此外, 倾斜手指叉指变换器 (SFITs) 可以用来调整细胞和微粒模式的刺激一段时间的倾斜手指为某一共振20,31。然而, 带宽与倾斜的手指的数量成反比。与传统的螺旋型磁粉分离器的单节线相比, 多压力节线具有较高的分离效率和灵敏度。另外, 压力节点的位置也可以通过调整在设计32,33中应用到两个 IDTs 的相位差来改变。
IDTs 的基本频率和第三次谐波具有相似的频率响应, 使它们能够同时激发, 为微粒操作34提供了更多的调谐。与传统的单频励磁相比, 调整双频励磁的声压和两者之间的相位提供了技术的唯一性, 例如高达2倍的缩短运动时间到压力节点线或中心的微通道, 不同数量和位置的压力节点线, 和微粒浓度。

<table border="0" cellpadding="0" cellspacing="0" width="689">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:257px;">poly-dimethylsiloxane</td>
			<td style="width:147px;">Dow Corning</td>
			<td style="width:119px;">Sylgard 184</td>
			<td style="width:167px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">poly-dimethylsiloxane elastomer base</td>
			<td>Dow Corning</td>
			<td>Sylgard 184</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">silicon wafer</td>
			<td>Bonda Technology</td>
			<td>SI8PSPD</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">negative tone photoresist</td>
			<td>Microchem</td>
			<td>SU-8</td>
			<td></td>
		</tr>
		<tr height="25">
			<td height="25" style="height:25px;">double-side polished LiNbO3 wafer</td>
			<td>University Wafer</td>
			<td style="width:119px;">Y-128&#176;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">positive photoresist</td>
			<td>Nicolaus-Otto-Stra&#223;e</td>
			<td>AZ 9260</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">oxygen plasma</td>
			<td>Harrick Plasma</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">plastic mask</td>
			<td>Infinite Graphics</td>
			<td style="width:119px;"></td>
			<td></td>
		</tr>
	</tbody>
</table>

microparticle manipulation by standing surface acoustic waves with dual-frequency excitations

本文演示了一种提高驻面声波 (螺旋埋弧) 在单片机系统中微粒操作的调谐能力的方法。同时激发的基本频率和它的第三次谐波, 这被称为双频励磁, 对一对交叉传感器 (IDTs) 可以产生一种新的类型的驻声波在微流控通道。改变双频励磁信号中的功率和相位, 可重构应用于微通道内微粒的声辐射力 (例如, 压力节点的数量和位置, 以及在相应的压力节点上的微粒浓度)。本文表明, 微粒子的运动时间只有一个压力节点可以减少2倍的功率比的基本频率大于90%。相比之下, 微通道中有三个压力节点, 如果小于这个阈值。此外, 调整基本频率与第三次谐波之间的初始相位, 会导致三个螺旋埋弧压力节点的不同运动速率, 以及微通道中每个压力节点的微粒百分比。实验观测与数值预测有很好的一致性。这种新颖的励磁方法能够很容易地、无创性地集成到系统中, 具有广泛的可维持, 对实验装置的改动也只有少数。

在双频励磁 (6.2 和18.6 兆赫) 下, 螺旋埋弧焊的声压和声辐射力分布在图 1中。在这里, 双频励磁发生在聚苯乙烯微粒 (直径4µm) 在微通道, 宽度为300µm 在一个声学功率146兆瓦。在P1 > 90% 的情况下, 产生的声学压力总是处于阶段, 因此只有一个压力节点存在于y = 150 µm。相比之下, 三压力节点存在于y = 75, 150, 225 µm 在p1</s...

Watch this Scientific Journal Video about Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations at JoVE.com

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

提出了一种用双频励磁微流控通道处理微粒的协议。

双频激励下驻面声波的微粒操纵

We demonstrate a method for increasing the tuning ability of a standing surface acoustic wave (SSAW) for microparticles manipulation in a lab-on-a-chip ...

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In materials science and engineering it is often necessary to obtain quantitative measurements of surface topography with micrometer lateral resolution. ...

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

制造，操作和表面声波驱动声逆流微流体流动可视化

Surface acoustic waves (SAWs) can be used to drive liquids in portable microfluidic chips via the acoustic counterflow phenomenon. In this video we ...

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The wettability of silicon (Si) is one of the important parameters in the technology of surface functionalization of this material and fabrication of ...

Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy

全套材料常数表征及其温度依赖性的压电材料使用共振超声波谱

During the operation of high power electromechanical devices, a temperature rise is unavoidable due to mechanical and electrical losses, causing the ...

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

烧蚀材料在试验过程中等离子体发生器发射光谱边界层研究

Ablative Thermal Protection Systems (TPS) allowed the first humans to safely return to Earth from the moon and are still considered as the only solution ...

Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles

制造和Acoustofluidic设备的运营支撑体声波驻波的聚焦鞘颗粒

Acoustophoresis refers to the displacement of suspended objects in response to directional forces from sound energy. Given that the suspended objects must ...

Hand Controlled Manipulation of Single Molecules via a Scanning Probe Microscope with a 3D Virtual Reality Interface

通过手扫描探针显微镜用三维虚拟现实接口控制单分子的操作

Considering organic molecules as the functional building blocks of future nanoscale technology, the question of how to arrange and assemble such building ...

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由当地接触式扫描涡操纵SQUID研究

Local, deterministic manipulation of individual vortices in type 2 superconductors is challenging. The ability to control the position of individual ...

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

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Stable and efficient red (R), green (G), and blue (B) light sources based on solution-processed quantum dots (QDs) play important roles in next-generation ...