Traceable assembly of microparts using optical tweezers

Kim, Jungdae; Hwang, Sun-Uk; Lee, Yong-Gu

doi:10.1088/0960-1317/22/10/105003

Cited by 10 publications

(10 citation statements)

References 26 publications

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“…Previous studies have implimented OT for advanced micro-assembly techniques that could not be achieved using directed self assembly [6] and for driving micro components within more complex systems. [7] Similarly, anisotropic particles were designed to enhance the magnetic properties of micro-scaled particles in order to achieve greater magnetic responses and develop magnetic microtools.…”

Section: Introductionmentioning

confidence: 99%

Optomagnetically Controlled Microparticles Manufactured with Glancing Angle Deposition

Lawson

Jenness

Clark

2015

Part. Part. Syst. Charact.

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734 wileyonlinelibrary.com www.particle-journal.com www.MaterialsViews.comOptical trapping and magnetic trapping are common micromanipulation techniques for controlling colloids including micro-and nanoparticles. Combining these two manipulation strategies allows a larger range of applied forces and decoupled control of rotation and translation; each of which are benefi cial properties for many applications including force spectroscopy and advanced manufacturing. However, optical trapping and magnetic trapping have confl icting material requirements inhibiting the combination of these methodologies. In this paper, anisotropic microscaled particles capable of being simultaneously controlled by optical and magnetic trapping are synthesized using a glancing angle deposition (GLAD) technique. The anisotropic alignment of dielectric and ferromagnetic materials limits the optical scattering from the metallic components which typically prevents stable optical trapping in three dimensions. Compared to the current state of the art, the benefi ts of this approach are twofold. First, the composite structure allows larger volumes of ferromagnetic material so that larger magnetic moments may be applied without inhibiting the stability of optical trapping. Second, the robustness of the synthesis process is greatly improved. The dual optical and magnetic functionality of the synthesized colloids is demonstrated by simultaneously optically translating and magnetically rotating a magnetic GLAD particle using a custom designed optomagnetic trapping system.involves the application of an electric fi eld generated by a highly focused laser to impart forces upon micrometer and nanometer scaled particles. Magnetic trapping is a similar procedure that generates forces through the application of an external magnetic fi eld generated by a permanent or electromagnet. Both of these techniques are desirable for many manufacturing, sensor, and experimental procedures because the forces may be applied using externally generated fi elds that do not require direct access to the sample. The limitations preventing simultaneous application of optical and magnetic trapping (OMT) within a single probe particle is inherently a material compatability issue. Optical trapping requires dielectrics, which have minimal optical absorption, in order to maximize the OT applied force, prevent undesirable optical scattering forces, and limit thermal vibrations. Alternatively, MT requires the presence of ferromagnetic materials which are not optically transparent and therefore are generally not applicable for OT. In order to combine the benefi ts of each micromanipulation technique with a single probe particle, the dielectric and ferromagnetic materials must be aligned such that the optical scattering is minimized while still including ferromagnetic material. This paper describes the design and synthesis of particles using a glancing angle deposition (GLAD) process, which results in so-called patchy particles. Due to the material anisotropy, magnetic GLAD partic...

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Section: Introductionmentioning

confidence: 99%

Optomagnetically Controlled Microparticles Manufactured with Glancing Angle Deposition

Lawson

Jenness

Clark

2015

Part. Part. Syst. Charact.

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“…Mechanical microgrippers, for instance, can pick up, position, and place different microcomponents in a precise manner to the correct locations. However, adhesion forces overcome gravity forces at the micrometer scale and make it difficult to release the microcomponents of the gripper 6,7 . Thus, the assembly techniques presented here are based on an optical gripper.…”

Section: Introductionmentioning

confidence: 99%

“…Interlocking or form-fit connections can be applied to assemble and disassemble 2PP-fabricated microcomponents 6,17,18 The main aim of this paper is to present and investigate an alloptical approach for a stable and releasable connection between 2PP-fabricated microcomponents. More precisely, a screw connection is transferred to the micrometer range and used to assemble screw-and nut-shaped microcomponents utilizing optical forces.…”

Section: Introductionmentioning

confidence: 99%

Optical screw-wrench for microassembly

et al. 2017

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For future micro-and nanotechnologies, the manufacturing of miniaturized, functionalized, and integrated devices is indispensable. In this paper, an assembly technique based on a bottom-up strategy that enables the manufacturing of complex microsystems using only optical methods is presented. A screw connection is transferred to the micrometer range and used to assemble screwand nut-shaped microcomponents. Micro-stereolithography is performed by means of two-photon polymerization, and microstructures are fabricated and subsequently trapped, moved, and screwed together using optical forces in a holographic optical tweezer set-up. The design and construction of interlocking microcomponents and the verification of a stable and releasable joint form the main focus of this paper. The assembly technique is also applied to a microfluidic system to enable the pumping or intermixing of fluids on a microfluidic chip. This strategy not only enables the assembly of microcomponents but also the combination of different materials and features to form complex hybrid microsystems.

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“…Releasing the previously held objects is also challenging because of stiction problems. To overcome these issues, several indirect methods using fluidic 1 , electric 2 , magnetic 3 , or photonic forces 4,5,6,7,8 have been proposed. Plasmonic tweezers that use photonic forces are based on the physics of extraordinary field enhancement several orders larger than the incident intensity 9 .…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

Kim

Lee

2017

JoVE

Self Cite

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Plasmonic tweezers use surface plasmon polaritons to confine polarizable nanoscale objects. Among the various designs of plasmonic tweezers, only a few can observe immobilized particles. Moreover, a limited number of studies have experimentally measured the exertable forces on the particles. The designs can be classified as the protruding nanodisk type or the suppressed nanohole type. For the latter, microscopic observation is extremely challenging. In this paper, a new plasmonic tweezer system is introduced to monitor particles, both in directions parallel and orthogonal to the symmetric axis of a plasmonic nanohole structure. This feature enables us to observe the movement of each particle near the rim of the nanohole. Furthermore, we can quantitatively estimate the maximal trapping forces using a new fluidic channel.

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Traceable assembly of microparts using optical tweezers

Cited by 10 publications

References 26 publications

Optomagnetically Controlled Microparticles Manufactured with Glancing Angle Deposition

Optomagnetically Controlled Microparticles Manufactured with Glancing Angle Deposition

Optical screw-wrench for microassembly

Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment

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