Plasmonic‐Tuned Flash Cu Nanowelding with Ultrafast Photochemical‐Reducing and Interlocking on Flexible Plastics

Park, Jung Hwan; Han, Seungyong; Kim, Dongkwan; You, Byoung Kuk; Joe, Daniel J.; Hong, Sukjoon; Seo, Jungyun; Kwon, Jinhyeong; Jeong, Chang Kyu; Park, Hong-Jin; Kim, Taek‐Soo; Ko, Seung Hwan; Lee, Keon Jae

doi:10.1002/adfm.201701138

Cited by 104 publications

(65 citation statements)

References 43 publications

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“…Nevertheless, the tungsten halogen lamp–induced welding employs specific illuminating setup and nitrogen atmosphere, which complicates mass production of AgNW films . Using a xenon flash lamp as a light source requires a sophisticated flash lamp system, and may need to accurately modulate the discharge voltage and pulse duration of flash ignition to optimize welding condition . The feature of the laser with a focused spot beam significantly hinders its application in the large‐scale fabrication .…”

Section: Introductionmentioning

confidence: 99%

Facile and Efficient Welding of Silver Nanowires Based on UVA‐Induced Nanoscale Photothermal Process for Roll‐to‐Roll Manufacturing of High‐Performance Transparent Conducting Films

Liang

Zhao

et al. 2018

Adv Materials Inter

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The continuous, large-area solution-processed production of silver nanowire (AgNW) transparent conducting films with outstanding optoelectronic and mechanical performance remains a challenge. Here, efficient welding of AgNWs is demonstrated using ultraviolet A (UVA) with the specific wavelength range from ≈320 to ≈400 nm based on a nanoscale photothermal process. The AgNW welding shows a self-terminating and self-limiting nature, and sensitivity to diameter of AgNWs. Sheet resistance of the UVA-illuminated (UVAI) AgNW films rapidly drops within 2 min without loss of transmittance. For the UVAI AgNW (30 nm in diameter) film, decrement of sheet resistance approaches three orders of magnitude (≈10 5 -10 2 Ohm sq −1 ) with original transmittance being (97%) retained, which significantly enhances its optoelectronic properties. Enhanced mechanical flexibility, electromagnetic interference (EMI) shielding effectiveness (SE), and heating performance are obtained in the UVAI AgNW films. The SE and plateau temperature of the AgNW film increase to 25 dB and 50 °C after illumination, respectively. Smart window, transparent heater, and triboelectric nanogenerator based on the UVAI AgNW film demonstrate its versatile applications in optoelectronics. Finally, the welding method is easily integrated into a roll-to-roll process to manufacture AgNW film with a low sheet resistance of 25 Ohm sq −1 and a high transmittance of 90%, and excellent flexibility.

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Section: Introductionmentioning

confidence: 99%

Facile and Efficient Welding of Silver Nanowires Based on UVA‐Induced Nanoscale Photothermal Process for Roll‐to‐Roll Manufacturing of High‐Performance Transparent Conducting Films

Liang

Zhao

et al. 2018

Adv Materials Inter

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“…This enhanced photothermal characteristic of the AgNW–N66 blends is attributed to the efficient coupling of the laser with the plasmon modes. Previously, Ko and coworkers demonstrated that plasmonic heating (i.e., by a continuous wave laser and flash lamp) in Cu and Ag NWs could lead to the melting of a polymer substrate and welding at the NW junctions. They also showed that plasmonic heating in a single NW was maximized when the polarization of the excitation was aligned with the transverse modes.…”

Section: Resultsmentioning

confidence: 99%

Photoprintable nanowire–polymer blends synthesized by dynamic emulsion polycondensation

Zhang

Karumuri

Alavi

et al. 2019

J of Applied Polymer Sci

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In this article, we report a photoprintable nanocomposite synthesized at room temperature in less than 10 s by aggressive mixing of two monomer solutions. Polycondensation occurs in the dispersed phase of the dynamic emulsion, microdroplets, in which the nanofillers are suspended. Hence, the synthesized composite microparticles have a high dispersion and high loading of nanofillers. Specifically, silver nanowire (AgNW)-nylon 66 blends with various Ag weight fractions are synthesized and studied. The poly(vinyl pyrrolidone) (PVP)-functionalized AgNWs (by polyol synthesis) are singly dispersed and tethered to the nylon matrix by PVP with a slight depression of the glass-transition temperature. The Ag-nylon powder melts under low-intensity visible continuous wave laser radiation; this allows convenient photoprinting of the nanocomposite structures. Photoprinting is demonstrated at a radiation intensity of 0.3 kW/cm 2 (405 nm laser) and a scan rate of 5 mm/s for a 1.49 wt % Ag content. This enhanced photothermal characteristic of the nanocomposite, which allows printing at low radiation intensities, is attributed to the efficient coupling of light to the AgNW plasmon modes and the high dispersion of nanowires in the polymer.

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“…A number of research groups have demonstrated flexible memories, thin film transistors (TFTs), and integrated circuits (ICs) as key technology for data processing, information storage, and communication . Since Kim et al reported functional flexible resistive random access memory (RRAM), various chalcogenide‐based phase change memories (PCMs) as well as RRAMs using inorganic (e.g., WO 3 , Al 2 O 3 , HfO 2 , TiO 2 ), carbon (graphene, carbon nanotubes (CNTs)), and organic materials have been fabricated on polymer films. In addition, an ultrathin TFT and Si‐based large‐scale integration (LSI) were demonstrated for high‐density flexible electronics .…”

Section: Introductionmentioning

confidence: 99%

Novel Electronics for Flexible and Neuromorphic Computing

Lee

Park

Kim

et al. 2018

Adv Funct Materials

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109

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REVIEWbeing converged with artificial intelligence (AI) by providing users' biological and behavioral signals collected in wearable biodevices, [21][22][23][24][25][26][27][28][29][30][31] offering intelligent services based on big data cloud computing and machine learning. [32][33][34][35][36][37][38][39][40] A number of research groups have demonstrated flexible memories, thin film transistors (TFTs), and integrated circuits (ICs) as key technology for data processing, information storage, and communication. [41][42][43][44][45][46][47][48][49] Since Kim et al. [50] reported functional flexible resistive random access memory (RRAM), various chalcogenidebased phase change memories (PCMs) [51][52][53][54] as well as RRAMs using inorganic (e.g., WO 3 , Al 2 O 3 , HfO 2 , TiO 2 ), [45,49,50,[55][56][57] carbon (graphene, carbon nanotubes (CNTs)), [58][59][60][61][62][63][64] and organic materials [65][66][67][68] have been fabricated on polymer films. In addition, an ultrathin TFT and Si-based large-scale integration (LSI) were demonstrated for high-density flexible electronics. [8,69,70] Beyond the front-end device level, flexible packaging has been developed to interconnect core and peripheral modules to realize fully operational system-on-plastic (SoP). [71][72][73][74][75] Neuromorphic computing systems (brain-inspired model of parallel neuron network) are considered as a promising technology for AI applications, overcoming the limitation of von Neumann architecture (serial and iterative processing) for intelligent data analysis and low power consumption. [76][77][78][79][80][81] With the rapid advancement in the electronics (e.g., memristor, PCM, and TFT) on plastics or any type of surface, [82][83][84][85][86][87][88][89][90] emulation of biological synapses (adaptive synaptic weight, [91][92][93][94] and spike-timing-dependent plasticity (STDP) [95][96][97][98][99] of neurons) is being demonstrated on flexible substrate, which realizes an era of merged electronics toward cognitive IoT, physiological sensor, wearable computer, and autonomous driving system. [92,100] Here, we present recent progress in the field of electronics for flexible and neuromorphic applications that can be classified into four main categories: i) various devices (e.g., resistive memory, PCM, TFT, and IC) on plastic for computing, ii) flexible electronic systems using large-scale interconnection and packaging, iii) electronics for neuromorphic engineering, and iv) promising research areas of flexible synaptic applications. In addition, we have organized the main features of the studies in each section as a table to clearly compare their performance and challenges. The new electronic concept of a flexible and Emerging classes of flexible electronic systems that can be attached to a wide range of surfaces from wearable clothes to internal organs have driven significant advances in communication protocols (e.g., Internet of Things, augmented reality) and clinical research, shifting today's personal computing paradigm. The field of "system ...

show abstract

Plasmonic‐Tuned Flash Cu Nanowelding with Ultrafast Photochemical‐Reducing and Interlocking on Flexible Plastics

Cited by 104 publications

References 43 publications

Facile and Efficient Welding of Silver Nanowires Based on UVA‐Induced Nanoscale Photothermal Process for Roll‐to‐Roll Manufacturing of High‐Performance Transparent Conducting Films

Facile and Efficient Welding of Silver Nanowires Based on UVA‐Induced Nanoscale Photothermal Process for Roll‐to‐Roll Manufacturing of High‐Performance Transparent Conducting Films

Photoprintable nanowire–polymer blends synthesized by dynamic emulsion polycondensation

Novel Electronics for Flexible and Neuromorphic Computing

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