Functionalized Gold Nanoparticles with a Cohesion Enhancer for Robust Flexible Electrodes

Abstract

The development of conductive inks is required to enable additive manufacturing of electronic components and devices. A gold nanoparticle (AuNP) ink is of particular interest due to its high electrical conductivity, chemical stability, and biocompatibility. However, a printed AuNP film suffers from thermally induced microcracks and pores that lead to the poor integrity of a printed electronic component and electrical failure under external mechanical deformation, hence limiting its application for flexible electronics. Here, we employ a multifunctional thiol as a cohesion enhancer in the AuNP ink to prevent the formation of microcracks and pores by mediating the cohesion of AuNPs via strong interaction between the thiol groups and the gold surface. The inkjet-printed AuNP electrode exhibits an electrical conductivity of 3.0 × 10 6 S/m and stable electrical properties under repeated cycles (>1000) of mechanical deformation even for a single printed layer and in a salt-rich phosphate-buffered saline solution, offering exciting potential for applications in flexible and 3D electronics as well as in bioelectronics and healthcare devices.

Strategies for Integrating Metal Nanoparticles with Two‐Photon Polymerization Process: Toward High Resolution Functional Additive Manufacturing

“…Resin Formulation with Pre-Formed NPs with 2PP: Octanethiolfunctionalized gold nanoparticles (OT-AuNPs) were synthesized by the method described in the previous publication. [39] OT-AuNPs were dispersed in terpineol (mixture of isomers) and then mixed with PETA and TrisSH (1:1 weight ratio) and DETC (0.2 wt.%) with varying concentrations of OT-AuNPs ranging from 0 to 1 wt.%. The mixture was sonicated using a bath sonicator for 30 min and then stirred overnight.…”

Photosensitisation of inkjet printed graphene with stable all-inorganic perovskite nanocrystals

“…The performance of hybrid devices could be improved by optimising the ink formulation and post deposition treatment, which merits future studies. We also successfully fabricated fully inkjet-printed CsPb(Br/I) 3 /iGr heterostructure devices (Figure 4a) with a pair of Au contact pads printed using AuNP ink 33 onto Si/SiO 2 with a gap of ~ 30 µm. A single printed line of iGr was deposited across the gold-electrodes and functionalised with inkjet deposited CsPb(Br/I) 3 NCs.…”

“…The iGr and i(Gr-CsPbBr 3 ) hybrid were annealed at 250 °C for 30 mins. The AuNP ink was deposited with a 10 pl drop volume cartridge (DMC-11610) with nozzle temperature of 35 °C, substrate temperature of 90 °C, and a drop spacing of 30 µm, as described by J. Im, et al 33 Films were then sintered at 150 °C for 30 mins. Drop-casting: A single drop of CsPb(Br/I) 3 NC solution (4 mg/ml in hexane) was drop-cast onto iGr to form a CsPb(Br/I) 3 /iGr heterostructure device for comparison with inkjet deposited CsPb(Br/I) 3 .…”

“…The AuNP ink was deposited with a 10 pl drop volume cartridge (DMC-11610) with nozzle temperature of 35 °C, sub-strate temperature of 90 °C, and a drop spacing of 30 µm, as described by J. Im, et al 33 Films were then sintered at 150 °C for 30 min.…”

Analisis Tekno-Ekonomi pada Produksi Nanopartikel Emas (AuNP) dengan Metode Biosintesis menggunakan Sargassum horneri pada Skala Industri

“…Selain itu, nanopartikel emas memiliki biokompatibilitas yang baik, kemampuan adsorpsi yang kuat, sitotoksisitas yang rendah, potensi multifungsi, dan stabilitas yang tinggi [3][4]. Berdasarkan keunikan tersebut, nanopartikel emas banyak digunakan sebagai katalis [5][6], biosensor [7][8], penghantaran obat [9], pencitraan sinar-X [10], terapi fototermal [11], dan perangkat bioelektrik [12], dan masih banyak lagi.…”