Chemical Lift-Off Process Using Acetone Ink for Easy Fabrication of Metallic Nano/Microstructures

In this paper, a chemical lift-off process using acetone ink was examined to attain the easy fabrication of metallic nano/microstructures. This process consists of five steps: cleaning of the substrate, chemical stamping, metal film deposition, coating with glue, and selective peeling. Details of the hot embossing process for the cycloolefin polymer (COP) film mold fabrication and the selection of the organic solvent ink for the chemical stamping are also explained. The fabrication of several kinds of metallic nano/microstructures, such as Au line and space structures, Au square film arrays, and Au dot arrays, is demonstrated. It is shown that metal films coated on the stamped region peeled off with the glue, and a metal film shaped in the stamp’s negative pattern remained on the substrate. Acetone is effective for reducing the surface energy of the substrate and the bonding strength, resulting in selective peeling of the coated metal film.

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Graphene Synthesis on Ultrathin Metal Catalyst Films

Volume 2: Processes; Materials ◽

10.1115/msec2019-2992 ◽

2019 ◽

Author(s):

Kaihao Zhang ◽

Sameh Tawfick

Keyword(s):

Thin Films ◽

Mechanical Performance ◽

Metal Films ◽

Metal Catalyst ◽

Graphene Synthesis ◽

Coated Metal ◽

The Stability ◽

Systematic Framework ◽

Selection Of

Abstract Graphene synthesis on ultra-thin catalysts can allow the use of graphene-coated metal films in electronic applications. Graphene coated thin films are expected to offer superior mechanical performance owing to the strength of graphene. However, several factors need to be considered to assure the stability of thin films at the high temperatures required for graphene synthesis. In this work, we present a systematic framework for the selection of thin films (< 1 micron thickness) to be used as catalyst for graphene synthesis. We present our progress towards the rapid synthesis of graphene at 1100°C in less than two minutes, thus avoiding solid state dewetting. The quality of the graphene is assessed by Scanning Electron Microscopy, Raman spectroscopy and indentation. It is shown that these films exhibit higher stiffness and resistance to crack propagation.

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Fundamentals of Metal Film Deposition With Hyperthermal Ions

10.21236/ada387858 ◽

2000 ◽

Author(s):

Barbara H. Cooper

Keyword(s):

Metal Film ◽

Film Deposition ◽

Hyperthermal Ions

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Nanoimprinted multifunctional nanoprobes for a homogeneous immunoassay in a top-down fabrication approach

Scientific Reports ◽

10.1038/s41598-021-85524-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Hubert Brueckl ◽

Astrit Shoshi ◽

Stefan Schrittwieser ◽

Barbara Schmid ◽

Pia Schneeweiss ◽

...

Keyword(s):

Thin Film ◽

Nanoimprint Lithography ◽

Thin Film Deposition ◽

Film Deposition ◽

In Vitro Diagnostics ◽

Top Down ◽

Highly Sensitive ◽

Optical And Magnetic Properties ◽

Lift Off

AbstractMultifunctional nanoparticles are discussed as versatile probes for homogeneous immunoassays for in-vitro diagnostics. Top-down fabrication allows to combine and tailor magnetic and plasmonic anisotropic properties. The combination of nanoimprint lithography, thin film deposition, and lift-off processing provides a top-down fabrication platform, which is both flexible and reliable. Here, we discuss the material compositions and geometrical designs of monodisperse multicomponent nanoparticles and their consequences on optical and magnetic properties. The rotational hydrodynamics of nanoparticles is measured and considered under the influence of magnetic shape anisotropy in the framework of the Stoner-Wohlfarth theory. The plasmon-optical properties are explained by discrete-dipole finite-element simulations. Rotational dynamical measurements of imprinted nanoprobes for two test proteins demonstrate the applicability as highly sensitive biomolecular nanoprobes.

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Metal film deposition on carbon anodes for high rate charge–discharge of Li–ion batteries

Surface Engineering ◽

10.1179/026708499101516560 ◽

1999 ◽

Vol 15 (3) ◽

pp. 225-229 ◽

Cited By ~ 12

Author(s):

T. Takamura ◽

J. Suzuki ◽

C. Yamada ◽

K. Sumiya ◽

K. Sekine

Keyword(s):

Metal Film ◽

Film Deposition ◽

High Rate ◽

Li Ion Batteries ◽

Li Ion ◽

Carbon Anodes ◽

Charge Discharge

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Testing the Effectiveness of Protocols for Removal of Common Conservation Treatments for Radiocarbon Dating

Radiocarbon ◽

10.1017/rdc.2017.68 ◽

2017 ◽

Vol 60 (1) ◽

pp. 35-50 ◽

Cited By ~ 15

Author(s):

Fiona Brock ◽

Michael Dee ◽

Andrew Hughes ◽

Christophe Snoeck ◽

Richard Staff ◽

...

Keyword(s):

Organic Solvent ◽

Vinyl Acetate ◽

Radiocarbon Dating ◽

Cellulose Nitrate ◽

Acid Base ◽

Acrylic Polymers ◽

Archaeological Wood ◽

Conservation Treatment ◽

Chemical Pretreatments ◽

Selection Of

AbstractTo achieve a reliable radiocarbon (14C) date for an object, any contamination that may be of a different age must be removed prior to dating. Samples that have been conserved with treatments such as adhesives, varnishes or consolidants can pose a particular challenge to 14C dating. At the Oxford Radiocarbon Accelerator Unit (ORAU), common examples of such substances encountered include shellac, the acrylic polymers Paraloid B-67 and B-72, and vinyl acetate-derived polymers (e.g. PVA). Here, a non-carbon-containing absorbent substrate called Chromosorb® was deliberately contaminated with a range of varieties or brands of these conservation treatments, as well as two cellulose nitrate lacquers. A selection of chemical pretreatments was tested for their efficiency at removing them. While the varieties of shellac and Paraloid tested were completely removed with some treatments (water/methanol and acetone/methanol/chloroform sequential washes, respectively), no method was found that was capable of completely removing any of the vinyl acetate-derived materials or the cellulose nitrate lacquers. While Chromosorb is not an exact analog of archaeological wood or bone, for example, this study suggests that it may be possible to remove aged shellac and Paraloid from archaeological specimens with standard organic solvent-acid-base-acid pretreatments, but it may be significantly more difficult to remove vinyl acetate-derived polymers and cellulose nitrate lacquers sufficiently to provide reliable 14C dates. The four categories of conservation treatment studied demonstrate characteristic FTIR spectra, while highlighting subtle chemical and molecular differences between different varieties of shellac, Paraloid and cellulose nitrate lacquers, and significant differences between the vinyl acetate derivatives.

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Development of Thin Metal Film Deposition Process for the Intravascular Catheter

10.1115/imece1999-0379 ◽

1999 ◽

Author(s):

Seok Chung ◽

Jun Keun Chang ◽

Dong Chul Han

Keyword(s):

Metal Film ◽

Three Dimensional ◽

Deposition Process ◽

Medical Application ◽

Thin Metal Film ◽

Film Deposition ◽

Thin Metal ◽

Mems Devices ◽

Sensors And Actuators ◽

Custom Made

Abstract To make some MF.MS devices such as sensors and actuators be useful in the medical application, it is required to integrate this devices with power or sensor lines and to keep the hole devices biocompatible. Integrating micro machined sensors and actuators with conventional copper lines is incompatible because the thin copper lines are not easy to handle in the mass production. To achieve the compatibility of wiring method between MEMS devices, we developed the thin metal film deposition process that coats micropattered thin copper films on the non silicon-wafer substrate. The process was developed with the custom-made three-dimensional thin film sputter/evaporation system. The system consists of process chamber, two branch chambers, substrate holder unit and linear/rotary motion feedthrough. Thin metal film was deposited on the biocompatible polymer, polyurethane (PellethaneR) and silicone, catheter that is 2 mm in diameter and 1,000 mm in length. We deposited Cr/Cu and Ti/Cu layer and made a comparative study of the deposition processes, sputtering and evaporation. The temperature of both the processes were maintained below 100°C, for the catheter not melting during the processes. To use the films as signal lines connect the signal source to the actuator on the catheter tip, we machined the films into desired patterns with the eximer laser. In this paper, we developed the thin metal film deposition system and processes for the biopolymeric substrate used in the medical MEMS devices.

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BIOCATALYTIC PROCESSES OF LOW-TEMPERATURE SYNTHESIS OF ESTERS. MODULATION OF THE FUNCTIONAL PROPERTIES OF LIPASE BY THE CHOICE OF SOLVENT AND SUPPORT FOR IMMOBILIZATION

BIOTECHNOLOGY: STATE OF THE ART AND PERSPECTIVES ◽

10.37747/2312-640x-2021-19-271-273 ◽

2021 ◽

Vol 1 (19) ◽

pp. 271-273

Author(s):

L.V. Perminova ◽

M.B. Pykhtina ◽

A.B. Beklemishev

Keyword(s):

Organic Solvent ◽

Functional Properties ◽

Chemical Nature ◽

Immobilized Lipase ◽

Carbon Aerogel ◽

Low Temperature Synthesis ◽

Temperature Synthesis ◽

Heterogeneous Biocatalysts ◽

Adsorptive Immobilization ◽

Selection Of

Biocatalytic processes for the synthesis of valuable products, such as different esters for various purposes, have been studied using heterogeneous biocatalysts prepared by immobilizing the recombinant lipase rPichia/lip on mesoporous silica (SiO2) and macroporous carbon aerogel (MCA). It was found that the functional properties of immobilized lipase, such as enzymatic activity, specificity toward pair of substrates (acid and alcohol), the molecules of which differ in the number of carbon atoms (C), as well as operational stability, depended on the method of adsorptive immobilization, the chemical nature of the support, and polarity of the organic solvent, i.e. logP. The functional properties of rPichia/lip have been shown to be modulated by the selection of an organic solvent and support for lipase immobilization.

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A New Analytical Expression for the T.C.R. of Thin Monocrystalline Metal Films

ElectroComponent Science and Technology ◽

10.1155/apec.5.209 ◽

1979 ◽

Vol 5 (4) ◽

pp. 209-213 ◽

Cited By ~ 5

Author(s):

C. R. Tellier

Keyword(s):

Electrical Conductivity ◽

Relaxation Time ◽

Reflection Coefficient ◽

Grain Boundary ◽

Metal Film ◽

Approximate Equation ◽

Metal Films ◽

Exact Equation ◽

Temperature Coefficient Of Resistivity ◽

Comparison Of The Results

The analysis of electrical conductivity of continuous thin monocrystalline metal film has been treated by assuming that the scattering from other sources than grain-boundaries can be described by an effective relaxation time. This relaxation time method is applied to the temperature coefficient of resistivity and leads to an analytical approximate equation in terms of the grain-boundary reflection coefficientrand the reduced thicknessk.Comparison of the results with those deduced from the exact equation (derived from the Mayadas and Shatzkes theory) shows that they deviate by less than 5% in largek–,p–, andr– ranges.

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