Functional electroless gold Ohmic contacts in light emitting diodes

Chen, P. Y.; Wong, HC; Hu, Shu‐Fen; Huang, Chih Hsuan; Liu, Ru‐Shi

doi:10.1063/1.3624831

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Although conventional EP leads to the formation of metal islands, which at later stages merge to dense deposits, 32,42 we find evolution of separate nanostructures. With ongoing Au deposition, 1D growth begins to dominate and NWs emanate from the particles comprising the initial film (Figure 2b).…”

Section: Resultsmentioning

confidence: 68%

Template-Free Electroless Plating of Gold Nanowires: Direct Surface Functionalization with Shape-Selective Nanostructures for Electrochemical Applications

Muench

Schaefer

Hagelüken

et al. 2017

ACS Appl. Mater. Interfaces

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Metal nanowires (NWs) represent a prominent nanomaterial class, the interest in which is fueled by their tunable properties as well as their excellent performance in, for example, sensing, catalysis, and plasmonics. Synthetic approaches to obtain metal NWs mostly produce colloids or rely on templates. Integrating such nanowires into devices necessitates additional fabrication steps, such as template removal, nanostructure purification, or attachment. Here, we describe the development of a facile electroless plating protocol for the direct deposition of gold nanowire films, requiring neither templates nor complex instrumentation. The method is general, producing three-dimensional nanowire structures on substrates of varying shape and composition, with different seed types. The aqueous plating bath is prepared by ligand exchange and partial reduction of tetrachloroauric acid in the presence of 4-dimethylaminopyridine and formaldehyde. Gold deposition proceeds by nucleation of new grains on existing nanostructure tips and thus selectively produces curvy, polycrystalline nanowires of high aspect ratio. The nanofabrication potential of this method is demonstrated by producing a sensor electrode, whose performance is comparable to that of known nanostructures and discussed in terms of the catalyst architecture. Due to its flexibility and simplicity, shape-selective electroless plating is a promising new tool for functionalizing surfaces with anisotropic metal nanostructures.

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Section: Resultsmentioning

confidence: 68%

Template-Free Electroless Plating of Gold Nanowires: Direct Surface Functionalization with Shape-Selective Nanostructures for Electrochemical Applications

Muench

Schaefer

Hagelüken

et al. 2017

ACS Appl. Mater. Interfaces

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“…Conducting electroless gold pads on light-emitting diodes chips are fabricated which exhibit no color difference, reliable wire bonding ability, and high values of electrical conductivity. The hardness of pads formed by electroless plating is three times softer than those formed by evaporation and the force gauges [37]. The industrial application of this plating is feasible.…”

Section: Nanoscaled Films and Layersmentioning

confidence: 85%

Electroless Deposition of Nanolayered Metallic Coatings

Sudagar¹,

Tamilarasan²,

Sanjith³

et al. 2017

Nanoscaled Films and Layers

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Electroless metallic coating is referred as the deposition of a substrate material by the process of chemical or autocatalytic reduction of aqueous metal ions deposited to a substrate material without any external supply of power. Electroless nickel alloys are generally considered synonymous to the word "electroless coating" as ~90% of productions in industries are of this alloy coating. Rest of the electroless metallic coatings includes gold, copper, palladium, cobalt, silver, etc. These electroless metallic coatings (other than electroless nickel coatings) are also one of the vibrant areas in the field of materials properties and surface engineering research. From the year 2000 to till date, nearly 1000 SCI indexed research papers were published on this topic. However, no comprehensive studies about the recent progress on this topic were reported elsewhere so far. In this context, the present chapter aims to give a complete overview on various aspects of the rest of the electroless metallic nanocoatings/layer as a whole. More importance will be on the recent developments of the nanocharacteristics and future scopes.

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