Read by QxMD icon Read


Nicole L Ing, Ryan K Spencer, Son H Luong, Hung D Nguyen, Allon I Hochbaum
Examples of long-range electronic conductivity are rare in biological systems. The observation of micrometer-scale electronic transport through protein wires produced by bacteria is therefore notable, providing an opportunity to study fundamental aspects of conduction through protein-based materials and natural inspiration for bioelectronics materials. Borrowing sequence and structural motifs from these conductive protein fibers, we designed self-assembling peptides that form electronically conductive nanofibers under aqueous conditions...
March 14, 2018: ACS Nano
Leng-Duei Koh, Jingjie Yeo, Yeong Yuh Lee, Qunya Ong, Mingyong Han, Benjamin C-K Tee
The present review will introduce the basic concepts of silk-based electronics/optoelectronics including the latest technological advances on the use of silk fibroin in combination with other functional components, with an emphasis on improving the performance of next-generation silk-based materials. It also highlights the patterning of silk fibroin to produce micro/nano-scale features, as well as the functionalization of silk fibroin to impart antimicrobial (i.e. antibacterial) properties. Silk-based bioelectronics have great potential for advanced or futuristic bio-applications including e-skins, e-bandages, biosensors, wearable displays, implantable devices, artificial muscles, etc...
May 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Evgeniya Kovalska, Ihor Pavlov, Petro Deminskyi, Anna Baldycheva, F Ömer Ilday, Coskun Kocabas
The range of applications of diverse graphene-based devices could be limited by insufficient surface reactivity, unsatisfied shaping, or null energy gap of graphene. Engineering the graphene structure by laser techniques can adjust the transport properties and the surface area of graphene, providing devices of different nature with a higher capacitance. Additionally, the created periodic potential and appearance of the active external/inner/edge surface centers determine the multifunctionality of the graphene surface and corresponding devices...
February 28, 2018: ACS Omega
Lance McKee
In this article, the author draws on his experience in the world of geospatial information technology standards to suggest a path toward acceleration of bioelectromagnetics science. Many studies show biological effects of extremely low frequency (ELF) and radiofrequency (RF) radiation despite that fact that the radiation is too weak to cause temperature changes in biological features. Considered together in worst case scenarios, such effects, many of which appear to have long latencies, could have potentially disastrous consequences for the health and safety of humans and wildlife...
February 23, 2018: Environmental Research
Ramendra Pal, Subhas C Kundu, Vamsi K Yadavalli
Flexible and thin-film devices are of great interest in epidermal and implantable bioelectronics. The integration of energy storage and delivery devices such as supercapacitors (SCs) with properties of flexibility, miniaturization, biocompatibility, and degradability are sought for such systems. Reducing e-waste, and using sustainable materials and processes are additional desirable qualities. Herein, a silk protein-based biocompatible and degradable thin film micro-supercapacitor (µSC) is reported. A protein carrier with the conducting polymer PEDOT:PSS and reduced graphene oxide dopant, is used as a photopatternable biocomposite ink...
February 26, 2018: ACS Applied Materials & Interfaces
Ensiyeh Sharifi, Esmaeil Shams, Abdollah Salimi, Abdollah Noorbakhsh, Mohammad K Amini
Nickel-cysteine nanostructures (Ni-CysNSs) are prepared by a simple wet chemistry procedure under mild conditions, in which l-cysteine acts both as precursor and structure directing agent. This method involves the reaction of nickel chloride with l-cysteine, followed by simultaneous adjusting the pH in the range of 6-8.5 by addition of an aqueous NaOH solution. The structure and morphology of the prepared products are characterized using various techniques, including X-ray powder diffraction (XRD), Fourier transform-infrared (FT-IR) spectroscopy, CHNS elemental analysis, Field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM)...
January 31, 2018: Colloids and Surfaces. B, Biointerfaces
Arjun K Fontaine, Hans E Anderson, John H Caldwell, Richard F Weir
Numerous clinical and research applications necessitate the ability to interface with peripheral nerve fibers to read and control relevant neural pathways. Visceral organ modulation and rehabilitative prosthesis are two areas which could benefit greatly from improved neural interfacing approaches. Therapeutic neural interfacing, or 'bioelectronic medicine', has potential to affect a broad range of disorders given that all the major organs of the viscera are neurally innervated. However, a better understanding of the neural pathways that underlie function and a means to precisely interface with these fibers are required...
January 2018: Neural Regeneration Research
Cristian Sevcencu, Thomas N Nielsen, Johannes J Struijk
OBJECTIVES: As the left vagus nerve (LVN) mediates a baroreflex blood pressure (BP) decrease, LVN stimulation (LVNS) could be a therapy for hypertension. Moreover, LVNS could elegantly be adjusted to the patient's actual BP and physical activity by using the neural information about BP and respiration extractable from LVN. However, unselective LVNS will trigger undesirable side-effects and therefore we here investigated the feasibility of using an intraneural electrode for extracting BP and respiration markers from the LVN and for selective LVNS...
February 14, 2018: Neuromodulation: Journal of the International Neuromodulation Society
Jianfang Li, Xiaojing He, Guannan Zhang, Ruiqiang Hang, Xiaobo Huang, Bin Tang, Xiangyu Zhang
Ti-6Al-4V (TC4) has received increasing attention as biomaterial but also raised concerns about the long-term safety of releasing of metal ions and poor wear resistance. In this work, an ZrO2/TiO2 alloyed layer was prepared on TC4 by plasma surface alloying with Zr and subsequently annealed in the air for improved corrosion and wear resistant. To assess the corrosion performance of the alloyed layer, the specimens were measured by open circuit potential, electrochemical impedance spectroscopy and potentiodynamic polarization in simulated body fluid solution...
January 29, 2018: Bioelectrochemistry
Jayeeta Kolay, Sudipta Bera, Tatini Rakshit, Rupa Mukhopadhyay
Realization of useful nanometre length scale devices in which metalloproteins are junction-confined in a distinct molecular arrangement for generating practical electronic signals (for example, in bioelectronic switch configuration), is elusive till date. This is mostly due to difficulties in observing electronically appropriate signal (i.e., reproducible and controllable), when studied under junction-assembled condition. A useful 'ON' - 'OFF' behaviour, based on the negative differential resistance (NDR) peak characteristics in the current-voltage response curves, acquired using metal-insulator-metal (MIM) configuration, has been observed only in case of a few proteins, namely, azurin, cytochrome C and bacteriorhodopsin, so far...
February 7, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Geoffrey A Slipher, W David Hairston, J Cortney Bradford, Erich D Bain, Randy A Mrozek
Soft and pliable conductive polymer composites hold promise for application as bioelectronic interfaces such as for electroencephalography (EEG). In clinical, laboratory, and real-world EEG there is a desire for dry, soft, and comfortable interfaces to the scalp that are capable of relaying the μV-level scalp potentials to signal processing electronics. A key challenge is that most material approaches are sensitive to deformation-induced shifts in electrical impedance associated with decreased signal-to-noise ratio...
2018: PloS One
Yun Zhao, Ye-Hua Zhang, Zhen Zhuge, Yi-Hong Tang, Jian-Wei Tao, Yong Chen
A simple, non-covalent modification strategy was proposed to synthesized poly-L-lysine-black phosphorus (pLL-BP) hybrid. BP nanoflakes were prepared with a water-phase exfoliation method. pLL can adhere to the surface of BP via hydrophobic interaction between butyl chains of pLL and BP surface, as well as the electrostatic interaction between the protonated amino groups on pLL and the negative charge on deprotonated PxOy groups remaining on BP. The as-synthesized pLL-BP hybrid turns out to be an ideal matrix for hemoglobin immobilization and direct electron transfer...
February 5, 2018: Analytical Chemistry
Wei Geng, Li Wang, Nan Jiang, Jian Cao, Yu-Xuan Xiao, Hao Wei, Ali K Yetisen, Xiao-Yu Yang, Bao-Lian Su
Inspired by the characteristics of cells in live organisms, new types of hybrids have been designed comprising live cells and abiotic materials having a variety of structures and functionalities. The major goal of these studies is to uncover hybridization approaches that promote cell stabilization and enable the introduction of new functions into living cells. Single-cells in nanoshells have great potential in a large number of applications including bioelectronics, cell protection, cell therapy, and biocatalysis...
February 2, 2018: Nanoscale
Ruibo Zhong, Qian Tang, Shaopeng Wang, Hongbo Zhang, Feng Zhang, Mingshu Xiao, Tiantian Man, Xiangmeng Qu, Li Li, Weijia Zhang, Hao Pei
Conducting hydrogels provide great potential for creating designer shape-morphing architectures for biomedical applications owing to their unique solid-liquid interface and ease of processability. Here, a novel nanofibrous hydrogel with significant enzyme-like activity that can be used as "ink" to print flexible electrochemical devices is developed. The nanofibrous hydrogel is self-assembled from guanosine (G) and KB(OH)4 with simultaneous incorporation of hemin into the G-quartet scaffold, giving rise to significant enzyme-like activity...
February 1, 2018: Advanced Materials
Chen-Jung Lee, Haiyan Wu, Yang Hu, Megan Young, Huifeng Wang, Dylan Lynch, Fujian Xu, Hongbo Cong, Gang Cheng
Polyelectrolytes have many important functions in both living organisms and man-made applications. One key property of polyelectrolytes is the ionic conductivity due to their porous networks that allow the transport of water and small molecular solutes. Among polyelectrolytes, zwitterionic polymers have attracted huge attention for applications that involve ion transport in a polyelectrolyte matrix; however, it is still unclear how the functional groups of zwitterionic polymer side chains affect their ion transport and swelling properties...
January 31, 2018: ACS Applied Materials & Interfaces
Dhrubajyoti Datta, Omshanker Tiwari, Krishna N Ganesh
During the last two decades, the molecular self-assembly of the short peptide diphenylalanine (Phe-Phe) motif has attracted increasing focus due to its unique morphological structure and utility for potential applications in biomaterial chemistry, sensors and bioelectronics. Due to the ease of their synthetic modifications and a plethora of available experimental tools, the self-assembly of free and protected diphenylalanine scaffolds (H-Phe-Phe-OH, Boc-Phe-Phe-OH and Boc-Phe-Phe-OMe) has unfurled interesting tubular, vesicular or fibrillar morphologies...
January 30, 2018: Nanoscale
Sureshkumar Kempahanumakkagari, Vanish Kumar, Pallabi Samaddar, Pawan Kumar, Thippeswamy Ramakrishnappa, Ki-Hyun Kim
Technological advancements combined with materials research have generated enormous types of novel substrates and materials for use as a biomolecular interface in various biological/medical, energy, and environmental applications. Lately, the embedding of biomolecules in those materials (e.g., metal-organic frameworks (MOFs), nanoparticles, hydrogels, graphene, and their hybrid composites) has become a vital research area in the construction of an innovative platform for various applications including sensors (or biosensors), biofuel cells, and bioelectronic devices...
January 25, 2018: Biotechnology Advances
Robert Herbert, Jong-Hoon Kim, Yun Soung Kim, Hye Moon Lee, Woon-Hong Yeo
Flexible hybrid electronics (FHE), designed in wearable and implantable configurations, have enormous applications in advanced healthcare, rapid disease diagnostics, and persistent human-machine interfaces. Soft, contoured geometries and time-dynamic deformation of the targeted tissues require high flexibility and stretchability of the integrated bioelectronics. Recent progress in developing and engineering soft materials has provided a unique opportunity to design various types of mechanically compliant and deformable systems...
January 24, 2018: Materials
Chen Cui, Nastaran Faraji, Antonio Lauto, Lorenzo Travaglini, Joanne Tonkin, David Mahns, Eleanor Humphrey, Cesare Terracciano, J Justin Gooding, Jan Seidel, Damia Mawad
Bioelectronic materials based on conjugated polymers are being developed in the hope to interface with electroresponsive tissues. We have recently demonstrated that a polyaniline chitosan patch can efficiently electro-couple with cardiac tissue modulating its electrophysiology. As a promising bioelectronic material that can be tailored to different types of devices, we investigate here the impact of varying the synthesis conditions and time of the in situ polymerization of aniline (An) on the sheet resistance of the bioelectronic patch...
January 24, 2018: Biomaterials Science
Rhiannon C G Creasey, A Bernardus Mostert, Tuan Nguyen, Bernardino Virdis, Stefano Freguia, Bronwyn Laycock
Electron transfer is central to cellular life, from photosynthesis to respiration. In the case of anaerobic respiration, some microbes have extracellular appendages that can be utilised to transport electrons over great distances. Two model organisms heavily studied in this arena are Shewanella oneidensis and Geobacter sulfurreducens. There is some debate over how, in particular, the Geobacter sulfurreducens nanowires (formed from pilin nanofilaments) are capable of achieving the impressive feats of natural conductivity that they display...
January 18, 2018: Acta Biomaterialia
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"