The direct-writing of low cost paper based flexible electrodes and touch pad devices using silver nano-ink and ZnO nanoparticles

Abstract

We report a novel and simple approach for the synthesis of silver nanoparticles capped with inositol (Ag NPs/ Ino) by the reduction of silver salt with ascorbic acid under basic conditions. UV-vis, TEM, FTIR and TGA techniques were used to characterize the Ag NPs/Ino to determine the size, shape and surface modification of the NPs. Stable silver nano-ink was prepared in aqueous solution containing 1% PVP (stabilizer) and glycerol (cosolvent) and was used for the direct-writing of a paper electrode with a roller ball-point pen for electrochemical applications. The solvent, stabilizing agents, concentration of NPs (10%), paper substrate, sintering temperature (40 C) and sintering time (15 min) were optimized to obtain a uniform coating of Ag NPs on the paper substrate. Further, the synthesis and fabrication of ZnO NPs on a paper substrate was put forward to design a touch pad device based on the piezoelectric effect. The preparation of paper based devices suggests a direction for the development of a simple, low cost and compatible approach for the direct-writing of paper based flexible electrodes and electronics for future applications. Fig. 3 (a) FTIR spectra of Ag NPs/Ino before and after sintering and (b) TGA analysis of Ag NPs/Ino performed over the temperature range of 0 to 800 C with an increase of 10 C min À1 .

Fabrication of conductive Ag/AgCl/Ag nanorods ink on Laser-induced graphene electrodes on flexible substrates for non-enzymatic glucose detection

“…In Online Resource Fig. S2 B, was determined, the exact peak was not shown, and the values of E were emitted about 0.1 V which is consistent with another reports 53 , 54 . The ink was the painted onto the electrode surface.…”

A New Class of Electronic Devices Based on Flexible Porous Substrates

“…Poor repeatability with multiple spraying cycles Pen-writing -Graphite, [ 129] Ag, [ 130] RGO, [ 131] Ti 3 C 2 [132] Facile and low-cost "on-demand" production, compatible with curved substrates…”

Optimization parameters effects on electrical conductivity of 3D printed circuits fabricated by direct ink writing method using functionalized multiwalled carbon nanotubes and polyvinyl alcohol conductive ink

“…Direct ink writing (D.I.W) method, one of the types of 3D printing technology has attracted researchers in recent years and has been recognised as an advanced fabrication technology because of the wide scope of applications in manufacturing flexible, wearable electronic circuits and components [1][2][3][4][5] e.g., printing flexible circuits [6,7], wearable electronics [8,9], super capacitors [10,11], batteries [12,13], strain sensor [14,15], energy harvesting devices [16,17], touch screens [18,19], bio sensors [20][21][22]. This D.I.W technology advances in the fabrication of complex electronic circuits by adopting pneumatic extrusion process [23][24][25] by formulating ink with controlled rheology [26][27][28].…”

“…Printability of inks is very essential in D.I.W as they determine the performance of fabricated parts. In printed electronics, conductive inks can impart flexibility [4][5][6][7][8]11,32], mechanical robustness and electrical conductivity [15][16][17][18][19]33]. Many researchers have fabricated electronic circuits by D.I.W method with printable inks which are composites of nano fillers like CNT, graphene, carbon black, silver inks and polymers like polyvinyl alcohol (PVA), polydimethylsiloxane (PDMS), polyvinylidene fluoride (PVDF), polyaniline (PANI) [11,14,15,18,22,34,35].…”