Surface vertical deposition for gold nanoparticle film

Abstract

In this rapid communication, we present the surface vertical deposition (SVD) method to synthesize the gold nanoparticle films. Under conditions where the surface of the gold nanoparticle suspension descends slowly by evaporation, the gold nanoparticles in the solid–liquid–gas junction of the suspension aggregate together on the substrate by the force of solid and liquid interface. When the surface properties of the substrate and colloidal nanoparticle suspension define for the SVD, the density of gold nanoparticles in the thin film made by SVD only depends on the descending velocity of the suspension surface and on the concentration of the gold nanoparticle suspension.

Near infrared surface plasmon resonance of gold tabular nanostructures in the HAuCl4–Na2S reaction

“…By using the same Na 2 S after 24 h, we obtained gold nanoparticles as before, 4 and did not find near infrared adsorption peak. By using the same Na 2 S after 24 h, we obtained gold nanoparticles as before, 4 and did not find near infrared adsorption peak.…”

“…[1][2][3][4][5] The typical reaction started when 2 mM bright yellow HAuCl 4 solution was mixed into 1 mM transparent Na 2 S solution with a volume ratio of 1:2 while stirring, and the mixed solution turned to colloidal dark brown. [1][2][3][4][5] The typical reaction started when 2 mM bright yellow HAuCl 4 solution was mixed into 1 mM transparent Na 2 S solution with a volume ratio of 1:2 while stirring, and the mixed solution turned to colloidal dark brown.…”

Gold nanoparticle wire and integrated wire array for electronic detection of chemical and biological molecules

“…The experimental and theoretical discussions of continuous deposition for nanoparticle films have been reported in previous papers. [25][26][27] On the application side, the gold nanoparticle thin film made by VECD has been used as a good platform for the soft laser desorption/ionization mass spectrometry. 28 While uninterrupted deposition results in a continuous nanoparticle thin film, deposition followed by rapid removal of a small quantity of the suspension leads to the formation of 1D nanoparticle a Author to whom correspondence should be addressed.…”

“…Various deposition times result the wire width ranging from several to hundred micrometers with a 100 nm thickness. 21 Since the conductance of porous gold nanoparticle wires made by discontinuous VECD is influenced by the local environment, 21,25 these conducting nanoparticle wires are promising to use in sensitive electric detections for chemical and biological objects because of the high surface to volume ratio. To test this, similar gold nanoparticle wires were painted with gold electrodes by the electron beam evaporator (Teme scasl BJD1800), and then measured by a semiconductor parameter analyzer (HP 4155A) or a lock-in amplifier (Signal Recovery 7265) through a probe station system.…”

Assemblies of gold icosahedra

“…Gold nanoparticles and nanorods are also successfully synthesized by the electrochemical method [5]. Recently, gold nanoparticle films were prepared by the surface vertical deposition method on a wettable substrate [6].…”