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设计制作了一种具有非对称弯曲微流道结构的微流控芯片, 搭建实验平台定量表征聚苯乙烯粒子和血细胞沿流道的动态惯性聚焦过程, 并系统研究了流体流速和粒子尺寸对粒子聚焦特性的调控机理. 通过分析粒子荧光图谱和对应量化强度曲线, 将粒子沿流道长度的横向迁移过程分为形成聚焦和平衡位置调整两个阶段, 指出在整个聚焦过程中具有小曲率半径的流道结构起主导作用. 根据全流速段内粒子聚焦特性的演变, 重点分析潜在惯性升力和Dean 曳力的竞争机制, 提出了阐述粒子聚焦流速调控过程的三阶段模型. 进一步比较两种尺寸粒子聚焦位置和聚焦率随流速与流道长度的变化规律, 发现大粒子具有更好的聚焦效果和稳定性, 且两种粒子的相对位置可通过流速进行调整. 最后, 通过分析血细胞在非对称弯流道中的横向迁移特性, 验证了粒子惯性聚焦机理在复杂生物粒子操控方面的适用性. 上述结论为深入研究微流体环境下粒子的运动特性以及开发微流式细胞术等临床即时诊断器件提供了重要参考.
[1] Di Carlo D, Irimia D, Tompkins R G, Toner M 2007 Proc. Natl. Acad. Sci. U.S.A. 104 18892
[2] Martel J M, Toner M 2014 Annu. Rev. Biomed. Eng. 16 371
[3] Segre G, Silberberg A 1961 Nature 189 209
[4] Asmolov E S 1999 J. Fluid Mech. 381 63
[5] Ho B P, Leal L G 1974 J. Fluid Mech. 65 365
[6] Gossett D R, Tse H T K, Dudani J S, Goda K, Woods T A, Graves S W, Di Carlo D 2012 Small 8 2757
[7] Di Carlo D, Edd J F, Humphry K J, Stone H A, Toner M 2009 Phys. Rev. Lett. 102 094503
[8] Choi Y S, Seo K W, Lee S J 2011 Lab Chip 11 460
[9] Sun D K, Xiang N, Chen K, Ni Z H 2013 Acta Phys. Sin. 62 024703(in Chinese) [孙东科, 项楠, 陈科, 倪中华 2013 物理学报 62 024703]
[10] Sun D K, Xiang N, Jiang D, Chen K, Yi H, Ni Z H 2013 Chin. Phys. B 22 114704
[11] Seo K W, Choi Y S, Lee S J 2012 Exp. Fluids 53 1867
[12] Martel J M, Toner M 2012 Phys. Fluids 24 032001
[13] Martel J M, Toner M 2013 Sci. Rep. 3 3340
[14] Di Carlo D, Edd J F, Irimia D, Tompkins R G, Toner M 2008 Anal. Chem. 80 2204
[15] Gossett D R, Di Carlo D 2009 Anal. Chem. 81 8459
[16] Karabacak N M, Spuhler P S, Fachin F, Lim E J, Pai V, Ozkumur E, Martel J M, Kojic N, Smith K, Chen P I, Yang J, Hwang H, Morgan B, Trautwein J, Barber T A, Stott S L, Maheswaran S, Kapur R, Haber D A, Toner M 2014 Nat. Protoc. 9 694
[17] Oakey J, Applegate R W, Arellano E, Di Carlo D, Graves S W, Toner M 2010 Anal. Chem. 82 3862
[18] Gossett D R, Tse H T K, Lee S A, Ying Y, Lindgren A G, Yang O O, Rao J Y, Clark A T, Di Carlo D 2012 Proc. Natl. Acad. Sci. U.S.A. 109 7630
[19] Berger S A, Talbot L, Yao L S 1983 Annu. Rev. Fluid Mech. 15 461
[20] Dean W R 1927 Philos. Mag. Ser. 74 208
[21] Amini H, Lee W, Di Carlo D 2014 Lab Chip 14 2739
[22] Xiang N, Yi H, Chen K, Sun D K, Jiang D, Dai Q, Ni Z H 2013 Biomicrofluidics 7 044116
[23] Hur S C, Henderson-Maclennan N K, Mccabe E R B, Di Carlo D 2011 Lab Chip 11 912
-
[1] Di Carlo D, Irimia D, Tompkins R G, Toner M 2007 Proc. Natl. Acad. Sci. U.S.A. 104 18892
[2] Martel J M, Toner M 2014 Annu. Rev. Biomed. Eng. 16 371
[3] Segre G, Silberberg A 1961 Nature 189 209
[4] Asmolov E S 1999 J. Fluid Mech. 381 63
[5] Ho B P, Leal L G 1974 J. Fluid Mech. 65 365
[6] Gossett D R, Tse H T K, Dudani J S, Goda K, Woods T A, Graves S W, Di Carlo D 2012 Small 8 2757
[7] Di Carlo D, Edd J F, Humphry K J, Stone H A, Toner M 2009 Phys. Rev. Lett. 102 094503
[8] Choi Y S, Seo K W, Lee S J 2011 Lab Chip 11 460
[9] Sun D K, Xiang N, Chen K, Ni Z H 2013 Acta Phys. Sin. 62 024703(in Chinese) [孙东科, 项楠, 陈科, 倪中华 2013 物理学报 62 024703]
[10] Sun D K, Xiang N, Jiang D, Chen K, Yi H, Ni Z H 2013 Chin. Phys. B 22 114704
[11] Seo K W, Choi Y S, Lee S J 2012 Exp. Fluids 53 1867
[12] Martel J M, Toner M 2012 Phys. Fluids 24 032001
[13] Martel J M, Toner M 2013 Sci. Rep. 3 3340
[14] Di Carlo D, Edd J F, Irimia D, Tompkins R G, Toner M 2008 Anal. Chem. 80 2204
[15] Gossett D R, Di Carlo D 2009 Anal. Chem. 81 8459
[16] Karabacak N M, Spuhler P S, Fachin F, Lim E J, Pai V, Ozkumur E, Martel J M, Kojic N, Smith K, Chen P I, Yang J, Hwang H, Morgan B, Trautwein J, Barber T A, Stott S L, Maheswaran S, Kapur R, Haber D A, Toner M 2014 Nat. Protoc. 9 694
[17] Oakey J, Applegate R W, Arellano E, Di Carlo D, Graves S W, Toner M 2010 Anal. Chem. 82 3862
[18] Gossett D R, Tse H T K, Lee S A, Ying Y, Lindgren A G, Yang O O, Rao J Y, Clark A T, Di Carlo D 2012 Proc. Natl. Acad. Sci. U.S.A. 109 7630
[19] Berger S A, Talbot L, Yao L S 1983 Annu. Rev. Fluid Mech. 15 461
[20] Dean W R 1927 Philos. Mag. Ser. 74 208
[21] Amini H, Lee W, Di Carlo D 2014 Lab Chip 14 2739
[22] Xiang N, Yi H, Chen K, Sun D K, Jiang D, Dai Q, Ni Z H 2013 Biomicrofluidics 7 044116
[23] Hur S C, Henderson-Maclennan N K, Mccabe E R B, Di Carlo D 2011 Lab Chip 11 912
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