Biocompatible Collagen Films as Substrates for Flexible Implantable Electronics

Moreno, Salvador; Baniasadi, Mahmoud; Mohammed, Shakil; Mejía, I.; Chen, Yuanning; Quevedo‐Lopez, Manuel; Kumar, Nalin M.; Dimitrijevich, Slobodan D.; Minary‐Jolandan, Majid

doi:10.1002/aelm.201500154

Cited by 70 publications

(72 citation statements)

References 41 publications

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“…[1][2][3][4] Various materials including amorphous solids and organic and two-dimensional materials were utilized to fabricate exible electronics due to their good mechanical properties. [5][6][7][8][9][10] Recently, natural biomaterials have attracted growing attention owing to their reliable exibility and biocompatible, biodegradable and implantable characteristics, [11][12][13] which makes them popular in bioengineering and energy systems. 14,15 On the other hand, resistive random access memory (RRAM) was regarded as one promising candidate for next generation nonvolatile storage because of its simple structure, high density, fast switching speed, and low power consumption.…”

Section: Introductionmentioning

confidence: 99%

Flexible, transferable and conformal egg albumen based resistive switching memory devices

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Flexible, transferable and conformal egg albumen based resistive switching memory devices

et al. 2017

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“…Additionally, processing advances have enabled the formation of hydrogels, films, electrospun mats, and a variety of other formats . These fundamental and applied developments have led to silk material systems with a number of diverse application areas, including tissue engineering, drug delivery, optics, and electronics, allowing silk to join a number of other polymeric hydrogel and film materials (PCL, PLGA, Collagen, and others) as advantageous options for highly compliant biological/technological interfaces . In a recent example, silk has enabled flexible and fully bioresorbable electronic and optical devices that show promise for implantable diagnostics and therapeutics, where silk remains a substrate material of unique utility …”

Section: Introductionmentioning

confidence: 99%

Direct Transfer Printing of Water Hydrolyzable Metals onto Silk Fibroin Substrates through Thermal‐Reflow‐Based Adhesion

Brenckle

Kaplan

Omenetto

2016

Adv Materials Inter

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join a number of other polymeric hydrogel and fi lm materials (PCL, PLGA, Collagen, and others) as advantageous options for highly compliant biological/technological interfaces. [25][26][27][28][29] In a recent example, silk has enabled fl exible and fully bioresorbable electronic and optical devices that show promise for implantable diagnostics and therapeutics, where silk remains a substrate material of unique utility. [29][30][31][32] Bioelectronic and biooptical devices based on silk and other polymeric systems are fabricated by integrating thin-fi lm device components made from metals and semiconductors with polymer substrates. The metal and semiconductor based components are most often manufactured via established micro-and nanofabrication techniques, and can be interfaced with polymeric substrates by a number of methods including inkjet printing, [ 21 ] direct deposition with a shadow mask, [ 31,32 ] and several transfer-print-based strategies. [ 25,[33][34][35] In the case of silk, additional encapsulating layers and/or doped therapeutics can then be incorporated to add functionality, and adjustment of silk's material polymorphism can tune the device behavior and degradation rate in vivo.However, there remain limitations to existing fabrication methods for substrate/device interfaces. Direct shadow-mask deposition on often leads to poor mechanical performance because the hydrated networks common to compliant biological polymers dry out and become brittle at the low pressures required for deposition. [ 5 ] Inkjet printing lacks the resolution for use with many microelectronic and optical devices and despite recent improvements remains limited in the variety of electronic materials that can be processed as inks. [36][37][38] This leaves transfer printing as the most advantageous interfacing strategy for building bioelectronics on polymer substrates such as silk.Transfer printing on silk is commonly accomplished in one of several ways. In the fi rst method, a silicon wafer is coated with a layer of fl uorosilane (FOTS) to limit adhesion and the device is built on top. Aqueous silk solution is directly cast on the surface and allowed to dry overnight. The limited adhesion of the device to the silanized wafer helps it to peel up with the dried silk, transferring it onto the silk as a substrate. [ 34 ] This method can be effective for large scale devices, In recent years, the use of biopolymers as interface materials between inorganic electronics and biological tissues has increased, which has necessitated the integration of micro-and nanofabrication techniques with these unconventional materials. This combination has led to devices with intriguing operational characteristics such as so-called "transient" bioresorbable devices. Here, a method is investigated which leverages the thermal refl ow characteristics of non-beta-sheet crystallized silk fi broin protein fi lms to transfer print electronic components onto bioresorbable silk substrates. This is accomplished by applying heat and pressure to the interface o...

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“…In the last few decades, the boom in consumer electronics rapidly creates the need for a sustainable portable and wearable power source. There are too many low-power electronic devices that are introduced to enhance the quality of our life, such as sensors, communication devices, GPS devices, implantable, and health monitoring devices [1][2][3][4]. All these electronic gadgets require electric power in the range of few microwatts to milliwatts.…”

Section: Introductionmentioning

confidence: 99%

Triboelectric Nanogenerators: Design, Fabrication, Energy Harvesting, and Portable-Wearable Applications

Vivekananthan¹,

Chandrasekhar²,

Alluri³

et al. 2020

Nanogenerators

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Scavenging energy from our day-today activity into useful electrical energy be the best solution to solve the energy crisis. This concept entirely reduces the usage of batteries, which have a complex issue in recycling and disposal. For electrical harvesting energy from vibration energy, there are few energy harvesters available, but the fabrication, implementation, and maintenances are quite complicated. Triboelectric nanogenerators (TENG) having the advantage of accessible design, less fabrication cost, and high energy efficiency can replace the battery in lowpower electronic devices. TENGs can operate in various working modes such as contact-separation mode, sliding mode, single-electrode mode, and free-standing mode. The design of TENGs with the respective operating modes employed in generating electric power as well as can be utilized as a portable and wearable power source. The fabrication of triboelectric layers with micro-roughness could enhance the triboelectric charge generation. The objective of this chapter is to deal with the design of triboelectric layers, creating micro structured roughness using the soft-lithographic technique, fabrication of TENGs using different working modes, energy harvesting performance analysis, powering up commercial devices (LEDs, displays, and capacitors), and portable-wearable applications.

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Biocompatible Collagen Films as Substrates for Flexible Implantable Electronics

Cited by 70 publications

References 41 publications

Flexible, transferable and conformal egg albumen based resistive switching memory devices

Flexible, transferable and conformal egg albumen based resistive switching memory devices

Direct Transfer Printing of Water Hydrolyzable Metals onto Silk Fibroin Substrates through Thermal‐Reflow‐Based Adhesion

Triboelectric Nanogenerators: Design, Fabrication, Energy Harvesting, and Portable-Wearable Applications

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