Capture of 2D Microparticle Arrays via a UV‐Triggered Thiol‐yne “Click” Reaction

Walker, Debora; Singh, Dhruv; Fischer, Peer

doi:10.1002/adma.201603586

Cited by 20 publications

(20 citation statements)

References 30 publications

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“…[65,88,102,110] Other methods that set the particles permanently on the substrate include local thermal heating, [111][112][113][114] gelation, [87,91,115] electrophoretic deposition, [116][117][118] and UV triggering. [119] Simulations and calculations of the optical forces [65,66,102,103] that affect the particles were presented. Several reviews regarding general approaches for optical manipulation are available, [31,33,50,[120][121][122] while Juan et al [123] focus on metallic particles and Koo et al focus on manipulation of cells.…”

Section: Mechanismmentioning

confidence: 99%

Laser‐Based Printing: From Liquids to Microstructures

Armon

Greenberg

Edri

et al. 2021

Adv Funct Materials

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Assembly of materials into microstructures under laser guidance is attracting wide attention. The ability to pattern various materials and form 2D and 3D structures with micron/sub‐micron resolution and less energy and material waste compared with standard top‐down methods make laser‐based printing promising for many applications, for example medical devices, sensors, and microelectronics. Assembly from liquids provides a smaller feature size than powders and has advantages over other states of matter in terms of relatively simple setup, easy handling, and recycling. However, the simplicity of the setup conceals a variety of underlying mechanisms, which cannot be identified simply according to the starting or resulting materials. This progress report surveys the various mechanisms according to the source of the material—preformed or locally synthesized. Within each category, methods are defined according to the driving force of material deposition. The advantages and limitations of each method are critically discussed, and the methods are compared, shedding light on future directions and developments required to advance this field.

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Section: Mechanismmentioning

confidence: 99%

Laser‐Based Printing: From Liquids to Microstructures

Armon

Greenberg

Edri

et al. 2021

Adv Funct Materials

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“…[ 31 ] For this we exploit a light‐triggered thiol‐yne click‐reaction to covalently fix the nanoribbon once it reaches a designated position. [ 32 ] The scheme of the thiol‐yne click chemistry is implemented by conjugating the MoS 2 nanoribbons with the thiol groups of thiol‐PEG‐alkyne molecules, leaving the active alkyne groups on the outer surface, and terminating the surface of a glass substrate with thiol groups by conjugating with silane‐PEG‐thiol molecules (as illustrated in Figure 4b, details in Supporting Information). When a functionalized MoS 2 nanoribbon has been directed to a designated position, a short exposure with UV light, initiates the “click” reaction between the thiol and the alkyne groups (Figure 4c).…”

Section: Figurementioning

confidence: 99%

Scalable Fabrication of Molybdenum Disulfide Nanostructures and their Assembly

Huang

Kang

et al. 2020

Advanced Materials

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Transition metal dichalcogenides (TMD) have attracted immense research interest owing to their 2D stacking molecular structures and the resulted chemical and physical properties. [1] Among various TMD materials, single-crystal molybdenum disulfide (MoS 2) nanoflakes in the 2H-phase, which constitute the basic unit of various crystalline MoS 2 nanostructures and bulk MoS 2 , possess edge sites and in plane sulfur vacancies which for instance show outstanding catalytic activity with an ultralow hydrogen adsorption Gibbs free energy-similar to that of the most efficient platinum and other noble metals. [2] However, in contrast to platinum, MoS 2 is much cheaper, and because it is a semiconductor, its electric conductivity can be readily tuned by the application of a voltage or light. This has been exploited in a variety of applications. For instance, MoS 2 has been demonstrated as an optical and biochemical sensor material. [3] MoS 2 fieldeffect transistors exhibit an on/off ratio as high as ≈10 8 and near-ideal subthreshold Molybdenum disulfide (MoS 2) is a multifunctional material that can be used for various applications. In the single-crystalline form, MoS 2 shows superior electronic properties. It is also an exceptionally useful nanomaterial in its polycrystalline form with applications in catalysis, energy storage, water treatment, and gas sensing. Here, the scalable fabrication of longitudinal MoS 2 nanostructures, i.e., nanoribbons, and their oxide hybrids with tunable dimensions in a rational and well-reproducible fashion, is reported. The nano ribbons, obtained at different reaction stages, that is, MoO 3 , MoS 2 /MoO 2 hybrid, and MoS 2 , are fully characterized. The growth method presented herein has a high yield and is particularly robust. The MoS 2 nanoribbons can readily be removed from its substrate and dispersed in solution. It is shown that functionalized MoS 2 nanoribbons can be manipulated in solution and assembled in controlled patterns and directly on microelectrodes with UV-click-chemistry. Owing to the high chemical purity and polycrystalline nature, the MoS 2 nanostructures demonstrate rapid optoelectronic response to wavelengths from 450 to 750 nm, and successfully remove mercury contaminants from water. The scalable fabrication and manipulation followed by light-directed assembly of MoS 2 nanoribbons, and their unique properties, will be inspiring for device fabrication and applications of the transition metal dichalcogenides.

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“…While optical tweezers are used to hold and manipulate particles during the manufacturing process, different mechanisms have been used to either immobilize the particles on the substrate or to bond particles with each other. Current bonding methods include UV‐triggered click chemistry, photopolymerization, and bonding by van der Waals force with assistance of plasmon‐enhanced optical scattering force . More details on the two steps are described below.…”

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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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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Capture of 2D Microparticle Arrays via a UV‐Triggered Thiol‐yne “Click” Reaction

Cited by 20 publications

References 30 publications

Laser‐Based Printing: From Liquids to Microstructures

Laser‐Based Printing: From Liquids to Microstructures

Scalable Fabrication of Molybdenum Disulfide Nanostructures and their Assembly

Digital Assembly of Colloidal Particles for Nanoscale Manufacturing

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