Optically based manufacturing with polymer particles

Ghadiri, Reza; Surbek, Mario; Esen, Cemal; Ostendorf, Andreas

doi:10.1016/j.phpro.2010.08.121

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…Such an assembly retains after the removal of the optical forces or even at the presence of adverse forces trying to break the assembly. One of the simplest ways to form such a bond is by heating the particle to melt its outer layer, which fuses with the substrate or other particle‐like fusion bonding on cooling . This is done by heating the whole manufacturing chamber or the individual particle above the melting temperature of the outer layer.…”

Section: Digital Assembly Of Particles With Optical Tweezersmentioning

confidence: 99%

“…One of the simplest ways to form such a bond is by heating the particle to melt its outer layer, which fuses with the substrate or other particle-like fusion bonding on cooling. [72] This is done by heating the whole manufacturing chamber or the individual particle above the melting temperature of the outer layer. For the localized heating of the particle, the solution containing Part.…”

Section: Digital Assembly Of Particles With Optical Tweezersmentioning

confidence: 99%

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Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

Kotnala

Zheng

2019

Part & Part Syst Charact

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From unravelling the most fundamental phenomena to enabling applications that impact our everyday lives, the nanoscale world holds great promise for science, technology, and medicine. However, the extent of its practical realization relies on manufacturing at the nanoscale. Among the various nanomanufacturing approaches being investigated, the bottom‐up approach involving assembly of colloidal nanoparticles as building blocks is promising. Compared to a top‐down lithographic approach, particle assembly exhibits advantages such as smaller feature size, finer control of chemical composition, less defects, lower material wastage, and higher scalability. The capability to assemble colloidal particles one by one or “digitally” has been heavily sought as it mimics the natural method of making matter and enables construction of nanomaterials with sophisticated architectures. An insight into the tools and techniques for digital assembly of particles, including their working mechanisms and demonstrated particle assemblies, is provided. Examples of nanomaterials and nanodevices are presented to demonstrate the strength of digital assembly in nanomanufacturing.

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Section: Digital Assembly Of Particles With Optical Tweezersmentioning

confidence: 99%

Section: Digital Assembly Of Particles With Optical Tweezersmentioning

confidence: 99%

Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

Kotnala

Zheng

2019

Part & Part Syst Charact

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“…Thermal and photothermal [9,10] or different chemical [11] approaches can be used to fuse particles. Nevertheless, this methods remain some disadvantages.…”

Section: Assembling Techniquementioning

confidence: 99%

Optical tweezers as manufacturing and characterization tool in microfluidics

et al. 2014

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Pumping and mixing of small volumes of liquid samples are basic processes in microfluidic applications. Among the number of different principles for active transportation of the fluids microrotors have been investigated from the beginning. The main challenge in microrotors, however, has been the driving principle. In this work a new approach for a very simple magnetic driving principle has been realized. More precisely, we take advantage of optical grippers to fabricate various microrotors and introduce an optical force method to characterize the fluid flow generated by rotating the structures through magnetic actuation. The microrotors are built of silica and magnetic microspheres which are initially coated with Streptavidin or Biotin molecules. Holographic optical tweezers (HOT) are used to trap, to position, and to assemble the microspheres with the chemical interaction of the biomolecules leading to a stable binding. Using this technique, complex designs of microrotors can be realized. The magnetic response of the magnetic microspheres enables the rotation and control of the structures through an external magnetic field. The generated fluid flow around the microrotor is measured optically by inserting a probe particle next to the rotor. While the probe particle is trapped by optical forces the flow force leads to a displacement of the particle from the trapping position. This displacement is directly related to the flow velocity and can be measured and calibrated. Variations of the microrotor design and rotating speed lead to characteristic flow fields.

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“…Polymer particles can be linked via thermal and photothermal processes by melting the outer layer of the particles. The heat can be induced by laser irradiation absorbed on Rhodamine-B dyed polymer films [20] or aided by an external heating source [21]. Also photochemical reactions can be used to fix particles dispersed in a polymerizable solution together [22,23].…”

Section: Binding Techniquementioning

confidence: 99%

Microfabrication by optical tweezers

et al. 2011

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A new method to fabricate microstructures built by polymer microparticles using a bottom-up technique is presented. The microstructures find broad application in micro-fluidics technology, photonics and tissue-engineering. The handling of the particles is realized by a holographic optical tweezers setup, ensuring the precise allocation of the particles to the desired structure. A biochemical technique ensures that the structure remains stable independent of the laser source. We show that with this method complex two-dimensional durable structures can be assembled and cannot be separated by optical forces. The structures are extendable during the entire fabrication process and can be linked to further particles and structures as desired.

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Optically based manufacturing with polymer particles

Cited by 11 publications

References 22 publications

Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

Optical tweezers as manufacturing and characterization tool in microfluidics

Microfabrication by optical tweezers

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