Flexible, ultrathin, and transparent sound-emitting devices using silver nanowires film

Abstract

We demonstrated flexible, ultrathin, and transparent sound-emitting devices (SEDs) using silver nanowires (AgNWs). Large area of AgNWs film on substrate was made by dry transfer technique. The sound emission from the AgNWs was measured as a function of power, distance, and frequency. Significant flat and wide frequency responses occurred between 15 and 45 kHz. The sound pressure was in good agreement with theoretical results. This indicates that a thermoacoustic effect exists in AgNWs. The AgNWs-SEDs can be integrated with the liquid crystal display, which shows the potential to be an important component in flexible electronic systems. V

Characteristics of thermally induced acoustic emission from nanoporous silicon device under full digital operation

“…Besides the PS device, the thermo-acoustic effect has been demonstrated in various structures using suspended metal wire array, 8 silver nanowires, 9 indium-tin-oxide films, 10 printed semiconductor nanoparticles, 11 polymers, 12,13 carbon nanotubes, 14,15 and graphene films. [16][17][18] The results of theoretical analyses [19][20][21][22][23] support that the resonance-free frequency response is an intrinsic feature of the thermo-acoustic conversion.…”

Theory and modeling of cylindrical thermo-acoustic transduction

“…More recently, Xiao et al [4] investigated the thermo-acoustic transducer which was fabricated by a carbon nanotubes (CNT) thin-film and the similar studies were also reported by other researchers [5][6][7][8]. Subsequently, a series of thermo-acoustic transductions manufactured from different materials such as CNT assemblies [9], aluminum wires array [10,11], graphene [12], silver nanowires film [13], suspended CNT-yarn array on a substrate [14] and individual CNT [15,16], were successively reported. A practical wideband sound frequency graphene earphone was also designed and tested by Tian et al [17].…”

Gap separation effect on thermoacoustic wave generation by heated suspended CNT nano-thinfilm

“…Considerable loud acoustic waves can be generated from a CNT thinfilm which was drawn from a superaligned CNT array. Subsequently, a series of new thermoacoustic devices were reported that were manufactured from carbon nanotube assemblies [11], aluminum wires array [12,13], thin metallic layer [14], grapheme-on-paper [15], silver nanowires [16] and suspended CNT-yarn array on a substrate [4]. At the same time, the performance of thermoacoustic devices which were immersed in different fluidic [17] and gaseous media [18,19] were also investigated.…”