Flexible and Disposable Sensing Platforms Based on Newspaper

Yang, MinHo; Jeong, Soon Woo; Chang, Sekchin; Kim, Kyung Hoon; Jang, Minjeong; Kim, Chi Hyun; Bae, Nam Ho; Sim, Gap Seop; Kang, Taejoon; Lee, Seok Jae; Choi, Bong Gill; Lee, Kyoung G.

doi:10.1021/acsami.6b10298

Cited by 51 publications

(29 citation statements)

References 49 publications

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“…Paper electronics is thriving in electronic security, flexible display, and biological diagnose for its outstanding features such as low‐cost, lightweight, and disposability . A series of investigations were dedicated to create functional modules on paper like 3D antenna, sensor, actuator, memory, and transistor .…”

Section: Introductionmentioning

confidence: 99%

“…Although most paper electronics are disposable, the circuits on paper will also raise environmental concern as they cannot be degraded or recycled like their substrate paper . Burning is the popular method to recycle functional materials such as silver nanoparticles on paper, it will be detrimental to environment and functional materials which are also difficult to be separated from the debris of paper. Therefore, an environmentally friendly method for fabricating and recycling of paper‐based circuits is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

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Recyclable Liquid Metal‐Based Circuit on Paper

Qin

Zhou

et al. 2018

Adv Materials Technologies

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and touch panel. [18] As people expected, [17] the processability, performance, and stability of electronic materials are basic characteristics of paper electronics which demand that paper-based circuits must have controllable scale, low resistance and high stability under deformation. Although most paper electronics are disposable, the circuits on paper will also raise environmental concern as they cannot be degraded or recycled like their substrate paper. [19] Burning is the popular method to recycle functional materials such as silver nanoparticles on paper, [1,20,21] it will be detrimental to environment and functional materials which are also difficult to be separated from the debris of paper. Therefore, an environmentally friendly method for fabricating and recycling of paper-based circuits is urgently needed. Basically, all paper electronic devices contain functional modules and circuits. The circuit with controllable scale and high folding stability is the key point on deciding the integration level of devices and electrical stability under deformation. Recently, the fabrication of flexible circuits on paper is mostly based on the connection of tiny conductors, such as metal nanoparticles, [3,7,9,18,22,23] metal nanowires, [15,24] and graphene. [16] Alternatively, conductive liquids (especially liquid metals) were expected to realize circuits with high folding stability for intrinsically combined characteristics of both high electrical conductivity and excellent fluidity. [25] Liquid metal (LM, Galinstan: 68.2 wt% Ga, 21.8 wt% In, 10 wt% Sn [26] ) exhibits favorable properties such as low melting point, [27] high electrical conductivity, [28] and low toxicity. [29] LM has been patterned on a variety of smooth substrates such as polydimethylsiloxane and polyvinyl chloride [25,26,[30][31][32][33][34][35][36][37] to function as circuits, sensors, and antennas. [25,31,32,[37][38][39] However, impeded by the porous topography of paper, it is hard to reduce the line-width of paper based LM circuits thinner than 200 µm with methods like direct writing, [40] desktop printing, [37,41] and screen printing. [42] With the LM, here the method for fabricating circuits with controllable line-width and high stability is demonstrated, and these circuits can be recycled based on the transforming mechanism between different morphologies of LM (bulk, wires, and microparticles). Bulk LM can be deformed into LM particles (LMPs) by sonication. [43] Then, LMPs can be deposited on paper which can further be selectively transformed into LM wires through mechanically sintering. [38,44] Two strategies were introduced in the mechanically sintering process to control the width of circuit (pristine circuit) by controlling the contact Paper electronics is considered very environmentally friendly, but effective recyclability of metallic circuits on paper still needs more improvement. Therefore, liquid metal (Galinstan) circuits based on the reversible conversion from particles to wires are fabricated on paper using mechanical methods, i....

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recyclable Liquid Metal‐Based Circuit on Paper

Qin

Zhou

et al. 2018

Adv Materials Technologies

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“…The outstanding features of flexible electronics, such as their excellent mechanical flexibility, light weight, and shock resistance, are expected to enable a wide range of disposable applications in the display, electronic security, biosensor, intelligent packaging, business card, and advertising banner product categories . The research and development of flexible electronics using plastic substrates have received much attention over the past decade; however, flexible electronics using plastic substrates are not yet designed to be disposable because of the relatively expensive plastic materials and the environmental issues associated with their very slow break‐down .…”

Section: Introductionmentioning

confidence: 99%

Novel Eco‐Friendly Starch Paper for Use in Flexible, Transparent, and Disposable Organic Electronics

Jeong

Baek

Han

et al. 2017

Adv Funct Materials

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An eco-friendly biodegradable starch paper is introduced for use in nextgeneration disposable organic electronics without the need for a planarizing layer. The starch papers are formed by starch gelatinization using a very small amount of 0.5 wt% polyvinyl alcohol (PVA), a polymer that bound to the starch, and 5 wt% of a crosslinker that bound to the PVA to improve mechanical properties. This process minimizes the additions of synthetic materials. The resultant starch paper provides a remarkable mechanical strength and stability under repeated movements. Robustness tests using various chemical solvents are conducted by immersing the starch paper for 6 h. Excellent nonpolar solvent stabilities are observed. They are important for the manufacture of organic electronics that use nonpolar solution processes. The applicability of the starch paper as a flexible substrate is tested by fabricating flexible organic transistors using pentacene, dinaphtho[2,3-b:2′,3′-f ]thieno[3,2-b]thiophene, and poly(dimethyltriarylamine) using both vacuum and solution processes. Electrically well-behaved device performances are identified. Finally, the eco-friendly biodegradability is verified by subjecting the starch paper to complete degradation by fungi in fishbowl water over 24 d. These developments illuminate new research areas in the field of biodegradable green electronics, enabling the development of extremely low-cost electronics.

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“…Nanopillar arrays were initially fabricated on the Si wafers by using of photo/soft-lithography followed by oxygen penetration and dry etching, producing the cylindrical shapes with diameters of 500 nm and heights of 1500 nm. Then, the composition of polyurethane acrylate (PU) and NOA63 (NO) as 7:3 (v/v) was selected in the study based on the previous report [ 27 , 28 ]. To fabricate the flexible substrate, the PUNO was detached from the wall of the Si mold.…”

Section: Methodsmentioning

confidence: 99%

Flexible nanopillar-based electrochemical sensors for genetic detection of foodborne pathogens

et al. 2018

Self Cite

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Flexible and highly ordered nanopillar arrayed electrodes have brought great interest for many electrochemical applications, especially to the biosensors, because of its unique mechanical and topological properties. Herein, we report an advanced method to fabricate highly ordered nanopillar electrodes produced by soft-/photo-lithography and metal evaporation. The highly ordered nanopillar array exhibited the superior electrochemical and mechanical properties in regard with the wide space to response with electrolytes, enabling the sensitive analysis. As-prepared gold and silver electrodes on nanopillar arrays exhibit great and stable electrochemical performance to detect the amplified gene from foodborne pathogen of Escherichia coli O157:H7. Additionally, lightweight, flexible, and USB-connectable nanopillar-based electrochemical sensor platform improves the connectivity, portability, and sensitivity. Moreover, we successfully confirm the performance of genetic analysis using real food, specially designed intercalator, and amplified gene from foodborne pathogens with high reproducibility (6% standard deviation) and sensitivity (10 × 1.01 CFU) within 25 s based on the square wave voltammetry principle. This study confirmed excellent mechanical and chemical characteristics of nanopillar electrodes have a great and considerable electrochemical activity to apply as genetic biosensor platform in the fields of point-of-care testing (POCT).

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Flexible and Disposable Sensing Platforms Based on Newspaper

Cited by 51 publications

References 49 publications

Recyclable Liquid Metal‐Based Circuit on Paper

Recyclable Liquid Metal‐Based Circuit on Paper

Novel Eco‐Friendly Starch Paper for Use in Flexible, Transparent, and Disposable Organic Electronics

Flexible nanopillar-based electrochemical sensors for genetic detection of foodborne pathogens

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