Journal ArticleDOI
Conductor microstructures by laser curing of printed gold nanoparticle ink
Jaewon Chung,Seung Hwan Ko,Nicole R. Bieri,Nicole R. Bieri,Costas P. Grigoropoulos,Dimos Poulikakos +5 more
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In this paper, the laser-based curing of printed nanoparticle ink to create microlines (resistors) of electrical resistivity approaching that of bulk gold was investigated, and a process that circumvents a serious drawback on the functionality of cured gold microlines is produced.Abstract:
The laser-based curing of printed nanoparticle ink to create microlines (resistors) of electrical resistivity approaching that of bulk gold was investigated. The present work relies on laser absorption in both the nanoparticle ink and the sintered gold layer, as well as the transport of thermal energy in the substrate and the resulting solvent vaporization and nanoparticle deposition and sintering. The morphology and electrical properties of the gold line can be controlled by modulating the spatial distribution of the laser beam intensity. Based on the understanding of the underlying physics, a process that circumvents a serious drawback on the functionality of cured gold microlines is produced. Microconductors with resistivity approaching that of bulk gold are produced, while loss of gold nanoparticles and cross sectional nonuniformities are avoided.read more
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Journal ArticleDOI
Rapid and Scalable Fabrication of Low Impedance, 3D Dry Electrodes for Physiological Sensing (Adv. Mater. Technol. 11/2022)
Ryan Kaveh,Natalie Tetreault,Karthik Gopalan,J. Calpe Maravilla,Michael Lustig,Rikky Muller,Ana Claudia Arias +6 more
TL;DR: In this article , a fabrication method for rapidly producing low impedance anatomically fit dry electrodes that do not require hydrogels is presented, which can be optimized for individuals at a fraction of the cost of existing vacuum deposition-based techniques.
Reference EntryDOI
Direct Laser Printing for Organic Electronics
TL;DR: In this paper, a review of the latest developments as well as the background and the evolution of direct laser printing of various materials for organic electronics applications is presented, highlighting the potential incorporation of lasers into the direct printing of entire devices and components.
Book ChapterDOI
Nanoparticles in Microvias
Rabindra N. Das,Frank D. Egitto +1 more
TL;DR: In this paper, the electrical interconnection enables distribution of both electronic signals and power throughout the package by means of multiple layers of metal circuit traces, typically made with drilled and plated holes.
Journal ArticleDOI
Making flexible electronics
TL;DR: In this article, the laser thermal lab at the University of California, Berkeley, in collaboration with the UC Berkeley College of Chemistry and the Swiss Federal Institute of Technology, Zurich has demonstrated a series of approaches to realize flexible electronics by combining three different techniques to achieve effective deposition of high-resolution metal patterns on heat-sensitive, low-cost, and lightweight plastic substrates at low temperature and under ambient atmospheric pressure.
Rapid Fabrication of Low Impedance, 3D Dry Electrodes for Physiological Sensing
Ryan Kaveh,Natalie Tetreault,Karthik Gopalan,J. Calpe Maravilla,Michael Lustig,Rikky Muller,Ana Claudia Arias +6 more
TL;DR: Electroless gold plating is used in combination with 3D printing to enable anatomically fit, high-performance, 3D dry electrodes that do not require any skin preparation and are comfortable to wear.
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Journal ArticleDOI
Size effect on the melting temperature of gold particles
Philippe A. Buffat,JP Borel +1 more
TL;DR: In this article, the melting points of small gold particles have been measured using a scanning electron-diffraction technique and the experimental results are quantitatively in good agreement with two phenomenological models.
Journal ArticleDOI
Ink-jet printing of doped polymers for organic light emitting devices
TL;DR: Ink-jet printing was used to directly deposit patterned luminescent doped polyvinyl carbazol (PVK) films as mentioned in this paper, and light emitting diodes with low turn-on voltages were also fabricated in PVK doped with coumarin 6 (C6).
Journal ArticleDOI
Ink-jet printed nanoparticle microelectromechanical systems
TL;DR: In this paper, the authors reported a high-Q resonant inductive coil, linear and rotary electrostatic-drive motors, and in-plane and vertical electrothermal actuators.
Journal ArticleDOI
Polymer electroluminescent devices processed by inkjet printing: I. Polymer light-emitting logo
Jayesh Bharathan,Yang Yang +1 more
TL;DR: In this paper, a hybrid structure consisting of an inkjet printed layer in conjunction with another uniform spin-coated polymer layer was proposed as an alternative to the regular ink-jet printed structure.
Journal ArticleDOI
Instability of thin polymer films on coated substrates : Rupture, dewetting, and drop formation
Ashutosh Sharma,Günter Reiter +1 more
TL;DR: In this article, a direct comparison of theoretical predictions and experimental results on instabilities and various stages of dewetting of thin polystyrene films, prepared on silicon wafers with three different nanosized (∼1 nm) coatings, dewet spontaneously above the glass transition temperature by the growth of cylindrical holes with wavy rims.