Au Nanoparticle Monolayer Nanosheets as Flexible Transparent Conductive Electrodes

Abstract

Flexible and transparent conductive electrodes are fundamental components used in advanced optical and electronic devices and organic electronics. In this work, we demonstrated a method for fabricating transparent conductive electrodes of Au nanosheets using UV irradiation on Au nanoparticle (AuNP) monolayer on water. The adsorbed AuNP monolayer was formed from the electrostatic attractive force between the anionic capping molecules on AuNPs dispersed in water with a cationic insoluble surfactant monolayer on water. UV irradiation promoted the decomposition of the surfactant deposited on the AuNPs, thereby transforming the AuNPs into mesh-like nanosheets that served as flexible and transparent conducting electrodes. The AuNP dispersions were also proven to be reusable in preparing conductive Au nanosheets for transparent flexible electrodes.

Triple-Helix Molecular Switch Triggered Cleavage Effect of DNAzyme for Ultrasensitive Electrochemical Detection of Chloramphenicol

“…As shown in Figure J, the typical reflection peak of GO at 12.2° shifted to 22.5° after reduction with PDDA, this change can be assigned to the hexagonal graphite structure C (002) and confirms the reduction of GO . For PDDA-Gr/Ag@Au NSs, the reflection peaks at 38.3°, 44.3°, 64.6°, and 77.6° can be assigned to the (111), (200), (220), and (311) crystal facets of Au and Ag. , Therefore, we conclude that PDDA-Gr still maintains its structural characteristics after the introduction of Ag@Au NSs. Furthermore, the reflection peaks of Ag, Au can be observed in the XRD pattern of PDDA-Gr/Ag@Au NSs, indicating the presence of Ag@Au NSs.…”

Hole, Convex, and Silver Nanoparticle Patterning on Polystyrene Nanosheets by Colloidal Photolithography at Air–Water Interfaces

“…Comparing the hole shapes formed by removing PMMA CPs with adhesive tape (Figure a,b) and HFIP (Figure c,d) revealed that UV irradiation alone produces holes in the PS films, with size apparently enlarged by HFIP treatment, which implied that the chemical composition of polystyrene surrounding the holes had changed to become HFIP-soluble; this change in composition was confirmed by FTIR spectroscopy of the PS films before and after UV irradiation. Figure clearly shows that UV irradiation resulted in the new IR bands that are assigned to CO and C–O stretching modes at ∼1740 and ∼1250 cm –1 , respectively, which are associated with the photo-oxidized polystyrene moiety. ,,− The oxidization source is clearly aerobic oxygen since irradiation with UV light under N 2 (Figure c) does not lead to hole formation. Furthermore, HFIP treatment (Figure d) led to fewer IR peaks that correspond to oxidized products due to the dissolution of the oxidized polystyrene regions surrounding the holes, resulting in hole enlargement.…”

“…Figure 4 clearly shows that UV irradiation resulted in the new IR bands that are assigned to C=O and C–O stretching modes at ∼1740 and ∼1250 cm –1 , respectively, which are associated with the photo-oxidized polystyrene moiety. 35 , 36 , 49 − 51 The oxidization source is clearly aerobic oxygen since irradiation with UV light under N 2 ( Figure 4 c) does not lead to hole formation. Furthermore, HFIP treatment ( Figure 4 d) led to fewer IR peaks that correspond to oxidized products due to the dissolution of the oxidized polystyrene regions surrounding the holes, resulting in hole enlargement.…”

“…To overcome this problem, we used the water surface as an alternative substrate. Specifically, PS films at air–water interfaces were subjected to UV-irradiation-assisted patterning; the patterned PS films were found to stick to various substrates, including curved ones, without any peeling process, providing further postprocessing opportunities for the construction of more complex and elaborate nanopatterns. − By focusing the UV light, photoreactive products can be deposited in small areas by simply solubilizing photoreactive compounds in the water phase, which is another advantage of a water surface as the processing substrate (Figure C). Herein, we report the use of an aqueous solution of silver ions (as the photoreactive compound) to fabricate periodic spot arrays of Ag nanoparticle aggregates on PS films.…”

Recent Progress on Emerging Transparent Metallic Electrodes for Flexible Organic and Perovskite Photovoltaics

“…[30,135] As for singlelayer metal films, recently, a continuous ultrathin Au nanosheet prepared from UV-irradiated Au NP monolayer has been reported with high flexibility, optical transmittance, and electrical conductivity, which is able to be transferred to other substrates. [136]…”