An Optically Driven Bistable Janus Rotor with Patterned Metal Coatings

Zong, Yanhua; Liu, Jing; Li, Rui; Guo, Honglian; Yang, Mingcheng; Li, Zhiyuan; Chen, Ke

doi:10.1021/acsnano.5b03565

Cited by 60 publications

(63 citation statements)

References 45 publications

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“…122 Similarly, dielectric nanospheres with strategically deposited Au patterns on the surface were compelled to rotate, owing to the asymmetrical optical scattering. 123 …”

Section: Physical-field-driven Rotary Nanomotorsmentioning

confidence: 99%

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Man-made rotary nanomotors: a review of recent developments

et al. 2016

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The development rotary nanomotors is an essential step towards intelligent nanomachines and nanorobots. In this article, we review the concept, design, working mechanisms, and applications of the state-of-the-art rotary nanomotors made from synthetic nanoentities. The rotary nanomotors are categorized according to the energy sources employed to drive the rotary motion, including biochemical, optical, magnetic, and electric fields. The unique advantages and limitations for each type of rotary nanomachines are discussed. The advances of rotary nanomotors is pivotal for realizing dream nanomachines for myriad applications including microfluidics, biodiagnosis, nano-surgery, and biosubstance delivery.

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“…122 Similarly, dielectric nanospheres with strategically deposited Au patterns on the surface were compelled to rotate, owing to the asymmetrical optical scattering. 123 …”

Section: Physical-field-driven Rotary Nanomotorsmentioning

confidence: 99%

“…127 Numerical simulations are necessary to analyze or predict how these forces attribute to the fundamental manipulation mechanisms. 16,123,126 …”

Section: Physical-field-driven Rotary Nanomotorsmentioning

confidence: 99%

Man-made rotary nanomotors: a review of recent developments

et al. 2016

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“…In 2015 we achieved the controlled stable rotation of a Janus particle in a linearly polarized optical trap by introducing patterned metal coatings through a simple procedure . The Janus particles were fabricated by sputtering of gold on deposited polystyrene colloidal particles, as shown in Figure a–c, which resulted in Janus particles with patterned gold coatings.…”

Section: Manipulation Of Plasmonic Particles With Optical Forcesmentioning

confidence: 99%

“…The Janus rotor permits easy control of both the rate and direction of rotation. Numerical analyses show that the observed directional rotation is the result of spontaneous symmetry breaking induced by the uneven patterns of metal coatings on the particles . Thus, instead of relying on precise fabrication of the device, our micro‐rotor employs the inevitable imperfections on a Janus particle to realize stable and controllable rotation.…”

Section: Manipulation Of Plasmonic Particles With Optical Forcesmentioning

confidence: 99%

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Plasmonic Particles with Unique Optical Interaction and Mechanical Motion Properties

Liu

Tian

et al. 2017

Part & Part Syst Charact

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Metal nanoparticles have unique localized surface plasmon resonance (SPR) properties due to the strong interaction of localized surface plasmon polariton (SPP) with incident light. This review will cover some of our recent theoretical and experimental studies on exploring the unique optical interaction and mechanical motion properties of plasmonic particles that originate from SPR enhanced light-matter interaction. Firstly, the efficient enhancement of both the fluorescence excitation and emission process of dye molecules by the double SPR modes (longitudinal and transverse modes) in gold nanorods, and surface plasmon amplification in metal nanoparticles with gain is discussed. Secondly, it is theoretically demonstrated that two basic physical processes of molecules interacting with light, i.e., the elastic Rayleigh scattering and inelastic Raman scattering, will strongly intertwine and correlate with each other in many plasmonic surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS) nanosystems. Thirdly, it is experimentally shown that SPR can enhance the optical force and torque of nanoparticles embedded within non-intrusive optical tweezers. The work presented in this review shows that plasmonic particles can possess unique optical interaction and mechanical motion properties when their geometries are deliberately controlled.bioscience to information technology like imaging and storage. For instance, when molecules located on metal nanoparticles are excited by incident light, their fluorescence or Raman signals can be significantly enhanced, with a level up to achieving the single-molecule detection. [6] Therefore, the manipulation of nanoparticles forms one of the fundamental basis for the cutting-edge researches on plasmonics, the potential applications of which have been widely found in biomedical sciences, energy harvesting and information technology. [4,[7][8][9][10][11] In this review article, we briefly introduce our recent progresses of research on plasmonic particles with unique optical interaction and mechanical motion properties due to the control and application of surface plasmons. Several topics, including fluorescence enhancement, plasmon amlification via gain, Raman scattering enhancement, and optical trapping and driving of plasmonic particles, will be covered and discussed. Among all these topics, a same element, i.e., the SPR enhanced light-matter interaction exists and plays a key role to create the many unique properties and effects. In section 2, we demonstrate a scheme of utilizing the double plasmon modes of gold nanorods to efficiently enhance the fluorescence of surrounding emitters, and surface plasmon amplification effects in metal nanoparticles with gain. In section 3 we present a new Raman enhancement theory with the inclusion of Rayleigh scattering to intertwine with the usual Raman scattering of molecules, and theoretically discuss its application to tip-enhanced Raman scattering (TERS) microscopy and surface-enhanced Raman scattering (SERS) spectrosc...

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Controllable Cellular Micromotors Based on Optical Tweezers

Zou

Zheng

et al. 2020

Adv Funct Materials

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Micromotors hold exciting prospects in biomedical applications but still face a great challenge. To date, there have been few reports of micromotors with high safety, flexible controllability, and full biocompatibility. Here, a multifunctional method based on an optical tweezer system is presented to realize controllable cellular micromotors. The method not only satisfies all of the above criteria but is also independent of the cell types and materials. Optical tweezers are used to generate a dynamic scanning optical trap along a given circular trajectory, which can trap and drive a microparticle or a single cell to move along the trajectory and thus generate a microvortex. Cells within the microvortex will be controllably rotated under an action of shear stress or torque and their rotation rate and direction can be controlled by changing the scanning frequency and direction of the dynamic optical trap. The proposed method is effective for both immotile target cells and swimming target cells. Additionally, it is further applied to realize synchronous translation and rotation of cellular micromotors and to assemble controllable and fully biocompatible cellular micromotor assays. The proposed method is believed to have potential applications in targeted drug delivery, biological microenvironment monitoring and sensing, and biomedical treatment.

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An Optically Driven Bistable Janus Rotor with Patterned Metal Coatings

Cited by 60 publications

References 45 publications

Man-made rotary nanomotors: a review of recent developments

Man-made rotary nanomotors: a review of recent developments

Plasmonic Particles with Unique Optical Interaction and Mechanical Motion Properties

Controllable Cellular Micromotors Based on Optical Tweezers

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