Download or read book Synthesis and Characterization of Titanium Nitride Nanowires for Neural electrode Coatings for Improving Electrode neuron Interface in the Brain written by Roaa Sait and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Titanium Nitride Nanotube Electrodes Used in Neural Signal Recording Application and Neurotransmitter Detection written by Gui Chen and published by . This book was released on 2020 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: The implantable sensor comprises a helix coil with a series-connected spiral coil connected in series to a cylindrical capacitor, all of them made by Titanium metal.
Download or read book Titanium nitride coatings written by Slobodan Marinković and published by . This book was released on 1988 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Atomic Layer Deposition of Titanium Nitride Films written by Anuththara Chalani Upeksha Abesinghe Arachchige and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the continuous miniaturization of microelectronic devices, robust deposition techniques are required which can provide continuous and conformal thin films even in high aspect ratio structures. Atomic Layer Deposition (ALD) is an excellent choice of deposition technique as it is capable of providing perfect film coverage. Because of its self-limited growth mechanism, ALD can afford sub-nanometer thickness control. Precursors used in ALD should be volatile, thermally stable at the deposition temperature, and highly reactive towards the co-regent. Traditionally, ALD has been used to grow metal oxide films. However, the microelectronics industry now demands ALD for metals and metal nitrides. Titanium nitride (TiN) is widely used as adhesion layers, electrode material, and diffusion barriers. Halogenated precursors used in TiN ALD studies require high deposition temperatures and the corrosive byproducts can etch the substrates. Dialkylamido titanium precursors have low thermal stabilities, and hence, significant carbon incorporation arises in TiN ALD. Moreover, during the TiN depositions, current Ti(IV) precursors should reduce to Ti(III) and this reduction step is often incomplete. Hence, the synthesis of novel Ti(III) precursors which do not require reduction steps is needed. The research herein seeks to develop highly volatile and thermally stable Ti(III) and Ti(IV) precursors and to carry out TiN ALD with highly thermally stable titanium metal-organic precursors.ALD of TiN film was carried out using Ti(tBu2DAD)2 and 1,1-dimethylhydrazine. Ti(tBu2DAD)2 is highly volatile and thermally stable with a decomposition temperature ≥ 350 °C, which is much higher than commonly used metal-organic precursors. According to the plots of growth rate versus pulse length on SiO2 substrates, self-limited growth behavior was observed ≤ 3.0 s for Ti(tBu2DAD)2 and ≤ 0.1 s 1,1dimethylhydrazine with a saturative growth rate of 0.28 Å/cycle. An ALD window was observed from 325 to 350 °C, and a linear relationship was observed for a plot of thickness versus the number of cycles at a deposition temperature of 325 °C for TiN growth on SiO2 substrates. GI-XRD revealed the presence of nanocrystalline material on the films deposited at 350 and 400 °C. Atomic force microscopy of 30 nm thick films deposited at 325 and 350 °C showed RMS roughness values of 4.1% and 5.2% of the film thicknesses, respectively. X-ray photoelectron spectroscopy analyses were performed on films deposited within the ALD window. Both samples revealed TiOxNy upon argon ion sputtering. TiN ALD was attempted using Ti(iPr2DAD)3 and 1,1-dimethylhydrazine, but highly resistive, rough, and poor-quality films were obtained. Novel Ti(III) complexes containing pyrazolate and carbohydrazide ligands were synthesized and characterized. These complexes are non-volatile and thermally unstable. Hence, they are not viable candidates for the TiN ALD study. However, Ti(III) pyrazolate complexes unexpectedly were found to decompose thermally to afford Ti(IV) pyrazolates and possibly Ti metal. A disproportionation mechanism is proposed. This finding may be valuable for the development of Ti metal, TiN, and TiSi2 CVD and ALD precursors.
Download or read book The Chemistry of Inorganic Biomaterials written by Christopher Spicer and published by Royal Society of Chemistry. This book was released on 2021-08-18 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book overviews the underlying chemistry behind the most common and cutting-edge inorganic materials in current use, or approaching use, in vivo.
Download or read book Synthesis and Characterisation of Titanium Nitride Films Using a Dual Ion Beam Technique written by Jae-Keun Kim and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth Mechanism of Titanium Nitride Nanowires and Their Physical Structural and Biological Properties written by Mainul Kader Faruque and published by . This book was released on 2010 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on mastering the fabrication and developing a fundamental understanding of titanium nitride (TiN) nanowires, and exploring their applications in electronic and biological devices. Grows TiN nanowires on a magnesium oxide substrate using a pulsed laser deposition technique. Uses gold as a catalyst. Studies the effect of droplet size of the catalyst and the deposition temperature on the growth of the TiN nanowires.
Download or read book A Novel Material Screening Platform for Nanoporous Gold based Neural Electrodes written by Christopher Abbott Reece Chapman and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural-electrical interfaces have emerged in the past decades as a promising modality to facilitate the understanding of the electropathophysiology of neurological disorders as well as the normal functioning of the central nervous system, and enable the treatment of neurological defects through electrical stimulation or electrically-controlled drug delivery. However, chronically implanted electrodes face a myriad of design challenges, including their coupling to neural tissue (biocompatibility), small form factor requirement, and their electrical properties (maintaining a low electrical impedance). Planar electrode materials such as planar platinum and gold experience a large increase in electrical impedance when electrode dimensions are reduced to increase spatial resolution of neural recordings. A decrease in electrode surface area reduces the total capacitance of the electrode double layer resulting in an increase in electrode impedance. This high impedance can reduce the signal amplitude and increase the thermal noise, resulting in degradation of signal-to-noise ratio. Conventionally, this increase in electrical impedance at small electrode dimensions has been mitigated by coatings with rough morphologies such as platinum black, conducting polymers, and titanium nitride. Porous surfaces have high effective surface area enabling low impedance at small electrode dimensions. However, achieving long-term stability of cellular coupling to the electrode surface has remained difficult. Designing electrodes that can physically couple with neurons successfully and maintain low impedance at small electrode dimensions necessitates consideration of novel electrode coatings, such as carbon nanotubes and gold nanopillars. Another promising material, and focus of this proposal, is thin film nanoporous gold (np-Au). Nanoporous gold is a promising material for addressing these limitations because of its inherently large effective surface area allows for lower impedances at small form factors, and its modifiable surface morphology can be used to control cell-electrode coupling. Additionally, thin film nanoporous gold is fabricated by traditional microfabrication methods, and thus can be directly adopted by the current state-of-the-art neural electrode fabrication processes. All these properties make thin film nanoporous gold a promising candidate for use in neural electrode surfaces. This dissertation seeks to characterize both the morphological and the electrical response of neural cells to thin film nanoporous gold morphologies using an in vitro electrode morphology screening platform. The specific aims for this proposal are to: (i) develop a electrode morphology library that displays varying topographies to study structure-property relationships of thin film nanoporous gold and cellular response, (ii) characterize neural cell response to identified nanoporous gold topographies that reduce adverse tissue response in vitro, and (iii) develop an electrophysiology platform to characterize neural coupling to each identified nanoporous gold topography.
Download or read book The Synthesis and Characterization of Nanowires with Long Range Ordering written by and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Role of Atomic Nitrogen in Synthesis of Titanium Nitride Coatings in the Vacuum Arc Discharge written by V. Gorokhovskii and published by . This book was released on 1990 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transparent Graphene Neural Electrodes and Field effect Transistors for Bio Applications written by Dong-Wook Park and published by . This book was released on 2016 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene, a novel material made of carbon atoms, has broad wavelength transparency from ultraviolet (UV) to infrared (IR). In addition, the electrical conductivity, mechanical flexibility, and biocompatibility of graphene make it a promising material for next-generation biomedical devices and biosensors. Among various applications of graphene, transparent graphene neural electrodes and graphene field-effect transistors have been studied. A transparent, flexible, and implantable graphene neural electrode array (or simply graphene brain sensor) that is capable of advanced in vivo neural imaging, electrophysiological recordings, optogenetics, and electrical stimulation has been demonstrated. Previous in vivo studies with conventional metal-based electrodes were limited to monitoring the tissue surrounding the electrode sites due to the opaqueness of the metal. Optical stimuli through the electrode sites and traces were also impossible with metal electrodes. The transparent graphene brain sensor implanted over the cerebral cortex in laboratory rodents allowed for chronic investigation of the underlying neural tissue while simultaneously performing electrophysiology. In vivo imaging of the cortical vasculature through the transparent brain sensor has been shown via fluorescence microscopy and 3D optical coherence tomography. Optogenetic activation of focal cortical areas directly beneath the electrode sites has been demonstrated in transgenic Thy1::ChR2 mice. In order to understand the working mechanism of the graphene electrodes and to expand their utility, the electrochemical impedance of the graphene electrode arrays and their demonstration to the electrical stimulation in GCaMP6 mice have been studied. In addition, graphene field-effect transistors (FETs) with a bottom-gate structure either on a rigid or flexible substrate (Parylene C) have been demonstrated. First, for the purpose of minimizing process-induced mobility degradation of graphene, graphene radio frequency (RF) transistors with buried bottom gates have been fabricated and characterized. Second, the fabrication, characterization, and performance improvement of flexible bottom-gate graphene transistors on Parylene C have been discussed. For all of the graphene FETs introduced here, the graphene transferred on top of the devices could be used as a bio sensing material. This study demonstrates an array of abilities of graphene neural electrodes and graphene FETs.
Download or read book Titanium Dioxide Nanoparticles written by Yucheng Lan and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few decades, titanium dioxide has been an important material for different sectors of modern technology. More precisely, this ceramic has been synthesised in the form of nanomaterial and applied in buildings, dye-sensitised solar cells, hydrogen production, sensors, rechargeable batteries, electrocatalysis, self-cleaning, environmental pollution, and antibacterial actions based on its enhanced optical properties. This book describes preparation, photocatalytic properties, and applications of nanostructured titanium dioxide with a particular focus on non-traditional syntheses and brookite. Titanium oxide nanoparticles are produced by hydrothermal processes, ionic liquid-assisted reactions, biological approaches, ball-milling techniques, etc. Physical properties and potential future applications of the produced nanostructured titanium dioxide nanoparticles are reviewed. Toxicity of titanium oxide nanoparticles and titanium oxide nanowires are also discussed.
Download or read book Nanotechnology and Neuroscience Nano electronic Photonic and Mechanical Neuronal Interfacing written by Massimo De Vittorio and published by Springer. This book was released on 2016-09-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the use of modern micro- and nanofabrication technologies to develop improved tools for stimulating and recording electrical activity in neuronal networks. It provides an overview of the different ways in which the “nano-world” can be beneficial for neuroscientists, including improvement of mechanical adhesion of cells on electrodes, tight-sealed extracellular recordings or intracellular approaches with strongly reduced invasiveness and tools for localized electrical or optical stimulation in optogenetics experiments. Specific discussion of fabrication strategies is included, to provide a comprehensive guide to develop micro and nanostructured tools for biological applications. A perspective on integrating these devices with state-of-the-art technologies for large-scale in vitro and in vivo experiments completes the picture of neuronal interfacing with micro- and nanostructures.
Download or read book Electrospun Nanofibers written by Mehdi Afshari and published by Woodhead Publishing. This book was released on 2016-09-13 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrospun Nanofibers covers advances in the electrospinning process including characterization, testing and modeling of electrospun nanofibers, and electrospinning for particular fiber types and applications. Electrospun Nanofibers offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science. Electrospinning is the most commercially successful process for the production of nanofibers and rising demand is driving research and development in this field. Rapid progress is being made both in terms of the electrospinning process and in the production of nanofibers with superior chemical and physical properties. Electrospinning is becoming more efficient and more specialized in order to produce particular fiber types such as bicomponent and composite fibers, patterned and 3D nanofibers, carbon nanofibers and nanotubes, and nanofibers derived from chitosan. - Provides systematic and comprehensive coverage of the manufacture, properties, and applications of nanofibers - Covers recent developments in nanofibers materials including electrospinning of bicomponent, chitosan, carbon, and conductive fibers - Brings together expertise from academia and industry to provide comprehensive, up-to-date information on nanofiber research and development - Offers systematic and comprehensive coverage for academic researchers, industry professionals, and postgraduate students working in the field of fiber science
Download or read book Carbon Nanotubes for Biomedical Applications written by Rüdiger Klingeler and published by Springer Science & Business Media. This book was released on 2011-02-09 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the potential of multi-functional carbon nanotubes for biomedical applications. It combines contributions from chemistry, physics, biology, engineering, and medicine. The complete overview of the state-of-the-art addresses different synthesis and biofunctionalisation routes and shows the structural and magnetic properties of nanotubes relevant to biomedical applications. Particular emphasis is put on the interaction of carbon nanotubes with biological environments, i.e. toxicity, biocompatibility, cellular uptake, intracellular distribution, interaction with the immune system and environmental impact. The insertion of NMR-active substances allows diagnostic usage as markers and sensors, e.g. for imaging and contactless local temperature sensing. The potential of nanotubes for therapeutic applications is highlighted by studies on chemotherapeutic drug filling and release, targeting and magnetic hyperthermia studies for anti-cancer treatment at the cellular level.
Download or read book PEDOT written by Andreas Elschner and published by CRC Press. This book was released on 2010-11-02 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: While there is information available in handbooks on polythiophene chemistry and physics, until now, few if any books have focused exclusively on the most forwardly developed electrically conductive polymer, Poly (3,4-ethylenedioxythiophene)-otherwise known as PEDOT. This resource provides full chemical, physical, and technical information about this important conducting polymer, discussing basic knowledge and exploring its technical applications. Presented information is based on information generated at universities and through academic research, as well as by industrial scientists, providing a complete picture of the experimental and the practical aspects of this important polymer.
Download or read book Neural Regenerative Nanomedicine written by Mehdi Razavi and published by Academic Press. This book was released on 2020-07-21 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural Regenerative Nanomedicine presents novel, significant, experimental results relating to nanoscience and nanotechnology in neural regeneration. As current research is at the forefront of healing the nervous system, the content in the book focuses on basic, translational and clinical research in neural repair and regeneration. Chapters focus on stem cell biology to advance medical therapies for devastating disorders, the complex, delicate structures that make up the nervous system, and neurodegenerative diseases that cause progressive deterioration, including Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis (ALS), multiple sclerosis and multiple system atrophy. - Presents a multidisciplinary focus on all research areas surrounding the applications of nanotechnology in neural regeneration - Provides a guide for physician and scientists, including necessary expertise for bioengineers, materials engineers, those in biomaterials and nanoengineering, stem cell biologists, and chemists - Covers many disciplines, including bioengineering, biomaterials, tissue engineering, regenerative medicine, neural regenerative medicine, and nanomedicine
