Monolayer Semiconductors: Scanning Probe Lithography Patterning of Monolayer Semiconductors and Application in Quantifying Edge Recombination (Adv. Mater. 48/2019)

Zhao, Peida; Wang, Ruixuan; Lien, Der‐Hsien; Zhao, Yingbo; Kim, Hyungjin; Cho, Joy; Ahn, Geun Ho; Javey, Ali

doi:10.1002/adma.201970340

Cited by 2 publications

(3 citation statements)

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“…[ 87–92 ] It is can encapsulate diverse cargos, such as small‐molecule drugs, biomolecules, genes, and nanoparticles, in submicron‐/nanofibers through the use of appropriate electrospinning techniques, such as blend electrospinning, emulsion electrospinning, and coaxial electrospinning, and a suitable device. [ 93–101 ] Due to advantages in forming biomimetic nanofibrous structures and providing micro‐/nanoencapsulation, electrospinning is regarded as an excellent method for fabricating cell fibers, particularly those with smaller diameters (<50 µm), as compared to other spinning methods.…”

Section: Technologies For Fabricating Cell Fibersmentioning

confidence: 99%

Electrospinning and Cell Fibers in Biomedical Applications

Zhao

Wang

2023

Advanced Biology

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Human body tissues such as muscle, blood vessels, tendon/ligaments, and nerves have fiber‐like fascicle morphologies, where ordered organization of cells and extracellular matrix (ECM) within the bundles in specific 3D manners orchestrates cells and ECM to provide tissue functions. Through engineering cell fibers (which are fibers containing living cells) as living building blocks with the help of emerging “bottom‐up” biomanufacturing technologies, it is now possible to reconstitute/recreate the fiber‐like fascicle morphologies and their spatiotemporally specific cell‐cell/cell‐ECM interactions in vitro, thereby enabling the modeling, therapy, or repair of these fibrous tissues. In this article, a concise review is provided of the “bottom‐up” biomanufacturing technologies and materials usable for fabricating cell fibers, with an emphasis on electrospinning that can effectively and efficiently produce thin cell fibers and with properly designed processes, 3D cell‐laden structures that mimic those of native fibrous tissues. The importance and applications of cell fibers as models, therapeutic platforms, or analogs/replacements for tissues for areas such as drug testing, cell therapy, and tissue engineering are highlighted. Challenges, in terms of biomimicry of high‐order hierarchical structures and complex dynamic cellular microenvironments of native tissues, as well as opportunities for cell fibers in a myriad of biomedical applications, are discussed.

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Section: Technologies For Fabricating Cell Fibersmentioning

confidence: 99%

Electrospinning and Cell Fibers in Biomedical Applications

Zhao

Wang

2023

Advanced Biology

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“…[ 1,2 ] Conventional lithographic technologies like extreme ultraviolet lithography and e‐beam lithography offer high resolution but are mainly suitable for high‐end applications due to their high cost and time‐consuming processes for mass production. This limitation has catalyzed the development of alternative methods, including nanoimprint lithography, [ 3,4 ] laser direct writing, [ 5–8 ] nanotransfer printing, [ 2,9,10 ] PEEL (photolithography, etching, electron beam deposition, and lift‐off) methods, [ 11,12 ] and tip‐based lithography [ 13–21 ] However, the fabrication of sub‐100‐nm‐scale nanostructures at room temperature under ambient conditions remains challenging.…”

Section: Introductionmentioning

confidence: 99%

“…[ 13 ] Various tip‐based lithographies have demonstrated 100 nm‐scale nanopatterning with multiple materials, including metals, [ 13,15,16,17,22,23 ] halide perovskite, [ 24 ] poly(methyl methacrylate) (PMMA), [ 19,25 ] two dimensional (2D) semiconductors. [ 20,26 ] Notably, resist materials used in e‐beam and photolithography have been patterned through tip‐based lithography, [ 15,19,22,25,27–30 ] some achieving sub‐100 nm resolution [ 15,19 ] compatible with nanoimprinting. [ 31 ] Metal nanostructures fabricated via this method find applications in plasmonic nanoparticles (NPs), [ 15,22 ] metal‐assisted chemical etching (MACE) catalysts, [ 13 ] electronic donors and acceptors in transition metal dichalcogenides, [ 16 ] strain sources for single photon emitters (SPEs), [ 21 ] and surface‐enhanced Raman scattering (SERS) templates.…”

Section: Introductionmentioning

confidence: 99%

Tip‐based Lithography with a Sacrificial Layer

Jo,

Lee,

Choi

et al. 2024

Small

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The fabrication of a highly controlled gold (Au) nanohole (NH) array via tip‐based lithography is improved by incorporating a sacrificial layer—a tip‐crash buffer layer. This inclusion mitigates scratches during the nano‐indentation process by employing a 300 nm thick poly(methyl methacrylate) layer as a sacrificial layer on top of the Au film. Such a precaution ensures minimal scratches on the Au film, facilitating the creation of sub‐50 nm Au NHs with a 15 nm gap between the Au NHs. The precision of this method exceeds that of fabricating Au NHs without a sacrificial layer. Demonstrating its versatility, this Au NH array is utilized in two distinct applications: as a dry etching mask to form a molybdenum disulfide hole array and as a catalyst in metal‐assisted chemical etching, resulting in conical‐shaped silicon nanostructures. Additionally, a significant electric field is generated when Au nanoparticles (NPs) are placed within the Au NHs. This effect arises from coupling electromagnetic waves, concentrated by the Au NHs and amplified by the Au NPs. A notable result of this configuration is the enhancement factor of surface‐enhanced Raman scattering, which is an order of magnitude greater than that observed with just Au NHs and Au NPs alone.

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Monolayer Semiconductors: Scanning Probe Lithography Patterning of Monolayer Semiconductors and Application in Quantifying Edge Recombination (Adv. Mater. 48/2019)

Abstract: We appreciate the reviewers for their time and insightful questions. Please find the responses to their comments below.

Cited by 2 publications

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Electrospinning and Cell Fibers in Biomedical Applications

Electrospinning and Cell Fibers in Biomedical Applications

Tip‐based Lithography with a Sacrificial Layer

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