Fabrication and Characterization of Biologically Inspired Mushroom-Shaped Elastomer Microfiber Arrays

2008 ◽  
Author(s):  
Seok Kim ◽  
Metin Sitti
Keyword(s):  
Small Diameter ◽  
Static Friction ◽  
High Yield ◽  
Large Area ◽  
Biologically Inspired ◽  
Deep Reactive Ion Etching ◽  
Fiber Arrays ◽  
High Uniformity ◽  
Smooth Contact ◽  
Microfiber Arrays

This paper reports enhanced adhesion and friction of biologically inspired mushroom-shaped elastomer microfibers which are fabricated using micromolding and the notching effect during deep reactive ion etching (DRIE). The fabrication approach of this work allows mushroom-shaped small diameter fibers down to 100s of nanometer scale (using interference lithography) with high uniformity, and high yield in large area. The fabricated microfiber arrays demonstrate approximately up to 17 time higher adhesion and around twice higher static friction than the nonfibrillar flat elastomer surface on a 6 mm diameter glass hemisphere. Moreover, adhesion experiments with the microfiber arrays which have different thickness backing layers reveal the significance of the backing layer thickness on adhesion of the fiber arrays on smooth contact surfaces.

Ultra-refining for the production of long-term highly pH-stable lignin nanoparticles in high yield with high uniformity

2021 ◽  
Author(s):  
Braz de Souza Marotti ◽  
Valdeir Arantes
Keyword(s):  
High Yield ◽  
Renewable Biomass ◽  
High Uniformity

In a bioeconomy, the valorization of lignin beyond its use to generate energy in renewable biomass-based industries is highly attractive and economically critical. However, most of its proposed applications are...

scholarly journals Large-area scanning probe nanolithography facilitated by automated alignment of probe arrays

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 61402-61409 ◽  
Author(s):  
Shuai Wang ◽  
Joseph Hosford ◽  
William P. Heath ◽  
Lu Shin Wong
Keyword(s):  
Scanning Probe ◽  
Large Area ◽  
High Uniformity ◽  
Automated Alignment

A method for the automated alignment of scanning probe polymer pen arrays is reported. This system enables nanolithography over large (cm2) areas with high uniformity, with any misalignment being ≤0.0003°.

scholarly journals Inflight fiber printing toward array and 3D optoelectronic and sensing architectures

2020 ◽  
Vol 6 (40) ◽  
pp. eaba0931
Author(s):  
Wenyu Wang ◽  
Karim Ouaras ◽  
Alexandra L. Rutz ◽  
Xia Li ◽  
Magda Gerigk ◽  
...  
Keyword(s):  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Small Diameter ◽  
Volume Ratio ◽  
Spatiotemporal Resolution ◽  
Fiber Arrays ◽  
Conventional Film ◽  
A Cell ◽  
One Step

Scalability and device integration have been prevailing issues limiting our ability in harnessing the potential of small-diameter conducting fibers. We report inflight fiber printing (iFP), a one-step process that integrates conducting fiber production and fiber-to-circuit connection. Inorganic (silver) or organic {PEDOT:PSS [poly(3,4-ethylenedioxythiophene) polystyrene sulfonate]} fibers with 1- to 3-μm diameters are fabricated, with the fiber arrays exhibiting more than 95% transmittance (350 to 750 nm). The high surface area–to–volume ratio, permissiveness, and transparency of the fiber arrays were exploited to construct sensing and optoelectronic architectures. We show the PEDOT:PSS fibers as a cell-interfaced impedimetric sensor, a three-dimensional (3D) moisture flow sensor, and noncontact, wearable/portable respiratory sensors. The capability to design suspended fibers, networks of homo cross-junctions and hetero cross-junctions, and coupling iFP fibers with 3D-printed parts paves the way to additive manufacturing of fiber-based 3D devices with multilatitude functions and superior spatiotemporal resolution, beyond conventional film-based device architectures.

scholarly journals Fabrication of Size-Controlled Metallic Nanogaps down to the Sub 3-Nm Level

2020 ◽  
Author(s):  
Sihai Luo ◽  
Andrea Mancini ◽  
Rodrigo Berté ◽  
Bård H. Hoff ◽  
Stefan A. Maier ◽  
...  
Keyword(s):  
Self Assembly ◽  
Surface Enhanced Raman Spectroscopy ◽  
High Yield ◽  
Large Area ◽  
Practical Applications ◽  
Molecular Diodes ◽  
Surface Enhanced Raman ◽  
Visible Light Active ◽  
Patterning Technique ◽  
Optical Applications

Metallic nanogaps are fundamental components of nanoscale photonic and electronic devices. However, the lack of reproducible high-yield fabrication methods with nanometric control over the gap-size has hindered practical applications. Here, we report a patterning technique based on molecular self-assembly and physical peeling that allows the gap-width to be tuned over the range 3 – 30 nm and enables the fabrication of massively parallel nanogap arrays containing hundreds of millions of ring-shaped nanogaps (RSNs). The method is used here to prepare molecular diodes across sub-3-nm metallic nanogaps and to fabricate visible-light-active plasmonic substrates based on large-area, gold-based RSN arrays. The substrates are applicable to a broad range of optical applications, and are used here as substrates for surface-enhanced Raman spectroscopy (SERS), providing high enhancement factors of up to 3e8 relative to similar, gap-free thin gold films.

scholarly journals Progressive Poling of Large Area, High r33 Electro-Optic Polymer SEO100c

2021 ◽  
Vol 11 (17) ◽  
pp. 8108
Author(s):  
Michael Maurer ◽  
Evan Gawron ◽  
Christopher Middlebrook
Keyword(s):  
Extended Period ◽  
High Yield ◽  
Large Area ◽  
Device Structure ◽  
Poling Process ◽  
Electro Optic ◽  
Waveguide Modulator ◽  
The Impact ◽  
Selection Of

SEO100c, an EO-polymer, has been reported of having an r33 in excess of 100 pm/V. Experimental poling research was performed on rib waveguide modulator for device design and development. Reported is the determination of the impact that temperature and voltage have on the poling of a SEO100c waveguide device in order to maximize the r33 while avoiding damage to the device structure ensuring high yield in manufacture. The poling process is shown to have a nonlinear relationship between r33 and poling field aiding in the selection of achievable poling voltages for required r33 values. Device thermal stability is quantified and reported for the complete poling process and the impacts upon r33. Investigation into the possible relaxation of device r33 is measured over an extended period demonstrating desirable use within deployable devices.

Modeling and Characterization of the Hydrogenated Amorphous Silicon Metal Insulator Semiconductor Photosensors for Digital Radiography

2007 ◽  
Vol 989 ◽  
Author(s):  
Nader Safavian ◽  
Y. Vygranenko ◽  
J. Chang ◽  
Kyung Ho Kim ◽  
J. Lai ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Spectral Response ◽  
Large Area ◽  
Metal Insulator ◽  
Active Matrix ◽  
High Uniformity ◽  
Measurement Results ◽  
Temperature Deposition ◽  
Hydrogenated Amorphous

AbstractBecause of the inherent desired material and technological attributes such as low temperature deposition and high uniformity over large area, the amorphous silicon (a-Si:H) technology has been extended to digital X-ray diagnostic imaging applications. This paper reports on design, fabrication, and characterization of a MIS-type photosensor that is fully process-compatible with the active matrix a-Si:H TFT backplane. We discuss the device operating principles, along with measurement results of the transient dark current, linearity and spectral response.

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