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RETURN TO ISSUEPREVC: Physical Processe...C: Physical Processes in Nanomaterials and NanostructuresNEXT

Dynamic Coupling of Optically Evolved Assembling and Swarming of Gold Nanoparticles with Photothermal Local Phase Separation of Polymer Solution

Cite this: J. Phys. Chem. C 2020, 124, 30, 16604–16615
Publication Date (Web):June 30, 2020
Copyright © 2020 American Chemical Society
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Abstract Image

Optical trapping of gold nanoparticles (Au NPs) at a glass/solution interface initially generates a periodically aligned structure of a few NPs along the direction perpendicular to a linearly polarized laser. When the number of NPs was increased, this alignment was expanded to the outside of the irradiated focus, forming a single large assembly where the Au NPs dynamically fluctuated like a swarming of bees. The morphology was dumbbell-shape, consisting of two swarms at both sides of the focus, and its size reached about 10 μm. This optically evolved assembling and swarming was studied in poly(N-isopropylacrylamide) (PNIPAM) solution, where liquid–liquid phase separation (LLPS) was induced by photothermal heating of the trapped Au NPs forming a microdroplet of highly concentrated PNIPAM. Dynamic coupling of the NPs assembling and swarming with the droplet formation of PNIPAM leads to cooperative optical evolution, through which the assembly was embedded in the single microdroplet.

Supporting Information

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The Supporting Information is available free of charge at

  • Scattering images of Au NP assembly; light scattering images of PS NPs assembly; plot showing the ratio of the size of the Au NPs assembly between x-direction elongation and y-direction elongation as a function of PNIPAM concentration (PDF)

  • Assembling and swarming dynamics of Au NPs at the surface of aqueous solutions with nothing, 18.8% w/w EG, and 1.75% w/w (5× speed) (AVI)

  • Assembling and swarming dynamics of Au NPs at the PNIPAM solution surface of 0, 0.01, 0.03, 0.1, 0.3, and 1.0% w/w (5× speed) (AVI)

  • Disappearing dynamics of swarming of Au NPs at the surface of aqueous solutions with nothing, 18.8% w/w EG, 0.01% w/w PNIPAM, and 1.0% w/w PNIPAM (normal speed) (AVI)

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Cited By

This article is cited by 15 publications.

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  2. Chih-Hao Huang, Tetsuhiro Kudo, Teruki Sugiyama, Hiroshi Masuhara, Johan Hofkens, Roger Bresolí-Obach. Photon Momentum Dictates the Shape of Swarming Gold Nanoparticles in Optical Trapping at an Interface. The Journal of Physical Chemistry C 2021, 125 (34) , 19013-19021.
  3. Jia-Syun Lu, Tetsuhiro Kudo, Boris Louis, Roger Bresolí-Obach, Ivan G. Scheblykin, Johan Hofkens, Hiroshi Masuhara. Optical Force-Induced Dynamics of Assembling, Rearrangement, and Three-Dimensional Pistol-like Ejection of Microparticles at the Solution Surface. The Journal of Physical Chemistry C 2020, 124 (49) , 27107-27117.
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  8. Chih-Hao Huang, Boris Louis, Roger Bresolí-Obach, Tetsuhiro Kudo, Rafael Camacho, Ivan G. Scheblykin, Teruki Sugiyama, Johan Hofkens, Hiroshi Masuhara. The primeval optical evolving matter by optical binding inside and outside the photon beam. Nature Communications 2022, 13 (1)
  9. Susav Pradhan, Catherine P. Whitby, Martin A.K. Williams, Jack L.Y. Chen, Ebubekir Avci. Interfacial colloidal assembly guided by optical tweezers and tuned via surface charge. Journal of Colloid and Interface Science 2022, 621 , 101-109.
  10. Abdullah Kamit, Ching‐Shiang Tseng, Tetsuhiro Kudo, Teruki Sugiyama, Johan Hofkens, Roger Bresolí‐Obach, Hiroshi Masuhara. Unraveling the three‐dimensional morphology and dynamics of the optically evolving polystyrene nanoparticle assembly using dual‐objective lens microscopy. Journal of the Chinese Chemical Society 2022, 69 (1) , 120-132.
  11. Cristina Sanz‐Fernández, Martín Molezuelas‐Ferreras, Jon Lasa‐Alonso, Nuno de Sousa, Xavier Zambrana‐Puyalto, Jorge Olmos‐Trigo. Multiple Kerker Anapoles in Dielectric Microspheres. Laser & Photonics Reviews 2021, 15 (7) , 2100035.
  12. Hiroshi Masuhara, Ken-ichi Yuyama. Optical Force-Induced Chemistry at Solution Surfaces. Annual Review of Physical Chemistry 2021, 72 (1) , 565-589.
  13. Jim Jui‐Kai Chen, Wei‐Yi Chiang, Tetsuhiro Kudo, Anwar Usman, Hiroshi Masuhara. Nanoparticle Assembling Dynamics Induced by Pulsed Optical Force. The Chemical Record 2021, 187
  14. Pisrut Phummirat, Nicholas Mann, Daryl Preece. Applications of Optically Controlled Gold Nanostructures in Biomedical Engineering. Frontiers in Bioengineering and Biotechnology 2021, 8
  15. Chih-Hao Huang, Tetsuhiro Kudo, Roger Bresolí-Obach, Johan Hofkens, Teruki Sugiyama, Hiroshi Masuhara. Surface plasmon resonance effect on laser trapping and swarming of gold nanoparticles at an interface. Optics Express 2020, 28 (19) , 27727.

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