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Fabrication And Characterization Of Nanostructured Surfaces
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Book Synopsis Fabrication and Characterization of Nanostructured Surfaces for Enhanced Heat Transfer by : Changho Choi
Download or read book Fabrication and Characterization of Nanostructured Surfaces for Enhanced Heat Transfer written by Changho Choi and published by . This book was released on 2010 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This objective of this study is to investigate the capability of nanostructured surfaces on dissipating heat flux by performing pool boiling and convective flow boiling. The generation of ultra-high heat flux from high performance electric devices has motivated a number of investigations related to advanced heat transfer especially in two-phase boiling performance. It has been reported by a number of researchers that nanostructured surfaces can result in much enhanced boiling performance, compared to the conventional methods by creating desire conditions for heat transfer. In this thesis, various nanostructured surfaces having different morphology were prepared on several engineering relevant substrates and were characterized for their pool boiling performance. Microreactor-assisted-nanomaterial-deposition, MAND [trademark symbol] was used to fabricate a variety of different ZnO nanostructured surfaces by careful adjustment of the processing parameters. ZSM-5 zeolite was synthesized using hydrothermal reaction. ZnO nanostructures in minichannel were also successfully deposited via a flow cell for the application of flow boiling experiment. Scanning electron microscopy (SEM) and Atomic Force Microscopy (AFM) were carried out to characterize the micro- and nanostructures. Contact angle measurement was conducted to evaluate wettability and X-ray Diffraction (XRD) was used to determine the crystalline structures. The most significant enhancement of critical heat flux (CHF) and heat transfer coefficient (HTC) was observed in the flower like ZnO nanostructured surface. We observed pool boiling CHF of 80-82.5 W/cm2 for nanostructured ZnO on Al surfaces versus a CHF of 23.2 W/cm2 on a bare Al surface with a wall superheat reduction of 25-38°C. This new CHF values on nanostructured surfaces corresponds to a boiling heat transfer coefficient as high as ~ 23000 W/m2K. This represents an increase of almost 4X in CHF on nano-textured surfaces, which is the highest enhancement factor reported today.
Book Synopsis Fabrication and Characterization of Nanostructured Surfaces by : Aaron Halpern
Download or read book Fabrication and Characterization of Nanostructured Surfaces written by Aaron Halpern and published by . This book was released on 2013 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work demonstrates a method for enhancing the sensitivity of a surface plasmon resonance biosensor, and develops novel nanostructured sensing surfaces. It is divided into the following four sections: Surface plasmon resonance phase imaging on gold thin films, optical diffraction of gold nanowires, fabrication of plasmonic nanoring arrays, and fabrication of nanofluidic channels and networks. The technique of surface plasmon resonance phase imaging (SPR-PI) was implemented in a linear microarray format. SPR-PI measured the phase shift of p-polarized light incident at the SPR angle reflected from a gold thin film by monitoring the position of a fringe pattern on the interface created with a polarizer- wedge depolarizer combination. SPR-PI was used to measure a self-assembled monolayer of 11-mercaptoundecamine (MUAM) as well as to monitor in situ DNA hybridization. The phase shifts were correctly calculated with a combined Jones matrix and Fresnel equation theory. Arrays of Au or Pd nanowires were fabricated via the electrochemical process of lithographically patterned nanowire electrodeposition (LPNE) and then characterized with scanning electron microscopy (SEM) and a series of optical diffraction measurements. Up to 60 diffraction orders were observed from the nanowire gratings with separate oscillatory intensity patterns appearing in the even and odd diffraction orders. The presence of these intensity oscillations is attributed to LPNE array fabrication process, and is explained with the Fourier transform of a mathematical model to predict the diffraction intensity patterns. A novel nanoring fabrication method that combines the process of LPNE with colloidal lithography is described. SEM measurements and Fourier transform near infrared (FT-NIR) absorption spectroscopy were used to characterize the strong NIR plasmonic resonance of the nanoring arrays. The absorption maximum wavelength varied linearly from 1.25 to 3.33 microns as predicted by a simple standing wave model linear antenna theory. This nanoring array fabrication method was also used to electrodeposit concentric double gold nanoring arrays that exhibited multiple NIR plasmonic resonances. Arrays and networks of nanochannels were created in PDMS from LPNE nanowires in a master-replica process and characterized with SEM, AFM and fluorescence imaging measurements. The PDMS replica was bonded to a glass substrate to create linear arrays of nanofluidic channels that filled with a 99% successful rate as determined from fluorescence imaging and the electrophoretic injection of both dye and nanoparticles. A double LPNE fabrication method was also used to create two-dimensional networks of crossed nanofluidic channels.
Book Synopsis Parallel Fabrication and Optoelectronic Characterization of Nanostructured Surfaces by :
Download or read book Parallel Fabrication and Optoelectronic Characterization of Nanostructured Surfaces written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among the more notable accomplishments during the course of this contract we identify the following results: (1) We have used diblock copolymers to transfer nanoscale periodic patterns to substrates. The nanopatterns have been transferred both in the form of etched holes and in arrays of metal dots. This has been performed without the need for silicon nitride layers or multi-layered resists. (2) We have conducted experiments using a closed-loop MM to measure the coefficient of thermal expansion (CTE) of a reference material. We have found that the piezo scanner non-linearity (0.2%) is unacceptably large for metrologic MM Moire interferometry. We have ordered a new closed-loop MM that incorporates a flexure-based scanner with a nonlinearity of 0.05%. The new instrumentation will allow us to overcome the piezo non-linearity difficulties, and (3) We have demonstrated a method for utilizing nanomasks for pattern transfer to an arbitrary substrate via an intermediate transfer layer (ITL). This approach is distinct from the technique of applying the nanomasks directly to the surface to be patterned. The ITL is a layer of a resist-like material into which the bionanomask pattern is transferred before it is then transferred to the substrate.
Download or read book Nanostructures written by Hitoshi Nejo and published by Springer Science & Business Media. This book was released on 2007-01-10 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main theme of this book is the exploration the underlying physical laws that permit the fabrication of nanometer-scale structures. As researchers attempt to fabricate nanometer-scale structures which do not exist per se, they must still employ the natural laws to fabricate them through processes such as self-assembly. This book will find service both as a reference work for researchers and as a comprehensive didactical text for graduate students.
Book Synopsis Fabrication and Characterization in the Micro-Nano Range by : Fernando A. Lasagni
Download or read book Fabrication and Characterization in the Micro-Nano Range written by Fernando A. Lasagni and published by Springer Science & Business Media. This book was released on 2011-03-23 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows an update in the field of micro/nano fabrications techniques of two and three dimensional structures as well as ultimate three dimensional characterization methods from the atom range to the micro scale. Several examples are presented showing their direct application in different technological fields such as microfluidics, photonics, biotechnology and aerospace engineering, between others. The effects of the microstructure and topography on the macroscopic properties of the studied materials are discussed, together with a detailed review of 3D imaging techniques.
Book Synopsis Nanostructured Zinc Oxide by : Kamlendra Awasthi
Download or read book Nanostructured Zinc Oxide written by Kamlendra Awasthi and published by Elsevier. This book was released on 2021-08-10 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured Zinc Oxide covers the various routes for the synthesis of different types of nanostructured zinc oxide including; 1D (nanorods, nanowires etc.), 2D and 3D (nanosheets, nanoparticles, nanospheres etc.). This comprehensive overview provides readers with a clear understanding of the various parameters controlling morphologies. The book also reviews key properties of ZnO including optical, electronic, thermal, piezoelectric and surface properties and techniques in order to tailor key properties. There is a large emphasis in the book on ZnO nanostructures and their role in optoelectronics. ZnO is very interesting and widely investigated material for a number of applications. This book presents up-to-date information about the ZnO nanostructures-based applications such as gas sensing, pH sensing, photocatalysis, antibacterial activity, drug delivery, and electrodes for optoelectronics. Reviews methods to synthesize, tailor, and characterize 1D, 2D, and 3D zinc oxide nanostructured materials Discusses key properties of zinc oxide nanostructured materials including optical, electronic, thermal, piezoelectric, and surface properties Addresses most relevant zinc oxide applications in optoelectronics such as light-emitting diodes, solar cells, and sensors
Book Synopsis Parallel Fabrication and Electronic Characterization of Nanostructured and Nanoheterostructured Metal Surfaces by :
Download or read book Parallel Fabrication and Electronic Characterization of Nanostructured and Nanoheterostructured Metal Surfaces written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among the more notable accomplishments during the course% of this contract we identify the following results: 0 A precisely ordered and precisely located array of 5 nm diameter nanoclusters has been fabricated by first etching into the substrate an array of holes with diameters comparable to the size of nanoclusters sought and then depositing adatoms on the substrate. Our methods enable rapid fabrication of arrays for fundamental studies and provide a route to manufacturability of nanostructure arrays for technological purposes. We reported the ability to control the morphology of nanometer thick Ti oxide films which were created via a parallel nanofabrication process using a two-dimensional protein crystal as a template. Atomic force microscopy was used to examine the evolution of these structures from a periodic array of nanometer-scale dots (nanodots) to a screen containing a periodic array of nanometer-scale holes (nanoscreen) as the film thickness was increased. We reported the creation of large arrays of nanometer-scale dots (nanodot arrays) with the oxides of several additional metals near Ti in the periodic table. A computer simulation of nanoscale hole formation based on curvature dependent sputtering and surface self-diffusion was formulated. The model simulates the experimental data from our nanopatterning process quite well.
Book Synopsis Nanostructured Materials by : Mohindar Seehra
Download or read book Nanostructured Materials written by Mohindar Seehra and published by BoD – Books on Demand. This book was released on 2017-07-12 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: There continues to be a worldwide interest in the size-dependent properties of nanostructured materials and their applications in many diverse fields such as catalysis, sensors, energy conversion processes, and biomedicine to name a few. The eleven chapters of this book written by different researchers include four chapters on the different methods of fabrication of specific materials followed by characterization of their properties, and the remaining seven chapters focusing on the fabrications and applications including three chapters on biomedical applications, two chapters on sensors, one chapter on solar cells, and one chapter on the use of nanoparticles in herbicides. These chapters provide up-to-date reviews useful for current and future researchers in these specific areas.
Book Synopsis Nanoscale Biosensing by : Kyunghee Cho
Download or read book Nanoscale Biosensing written by Kyunghee Cho and published by . This book was released on 2015 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this dissertation covers two types of nanomaterials (nanostructured arrays on surfaces and nanoparticle suspensions) with a unified focus on biosensing applications utilizing surface plasmon resonance (SPR), a surface sensitive phenomenon that occurs at the nanoscale. The first part of the dissertation describes the fabrication of lithographically patterned and electrochemically deposited large-scale arrays of nanorings and split nanorings. The fabrication and characterization of nanoring arrays made from a host of materials such as Ni, Au, Co, and polydopamine are discussed. Additionally, the fabrication of split nanoring arrays with potential applications as a tunable dichroic is explained. The application of plasmonic gold nanoring arrays as a biosensor to detect DNA hybridization with detection capabilities down to 50 pM of DNA follows. The next part of this dissertation shifts focus from nanostructured surfaces to the detection of nanoparticles in suspension using surface plasmon resonance microscopy (SPRM). Specifically, polymeric hydrogel nanoparticles that have been engineered to bind the hexacosa peptide melittin is studied. Point diffraction patterns in sequential real-time SPRM differential reflectivity images are counted to create digital adsorption binding curves of single 220 nm diameter hydrogel nanoparticles from picomolar nanoparticle solutions onto alkanethiol-modified gold surfaces. The SPRM responses from the adsorption of hundreds of individual hydrogel nanoparticles are quantified to measure the loading of melittin, a potential therapeutic compound, into the nanoparticles. Additional bulk fluorescence measurements of melittin uptake into the hydrogel nanoparticles are used to correlate the maximum signal observed by SPRM to the incorporation of approximately 65,000 molecules into each 220 nm hydrogel nanoparticle, corresponding to roughly 4% of its volume.
Book Synopsis Design, Fabrication, and Characterization of Multifunctional Nanomaterials by : Sabu Thomas
Download or read book Design, Fabrication, and Characterization of Multifunctional Nanomaterials written by Sabu Thomas and published by Elsevier. This book was released on 2021-11-24 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design, Fabrication, and Characterization of Multifunctional Nanomaterials covers major techniques for the design, synthesis, and development of multifunctional nanomaterials. The chapters highlight the main characterization techniques, including X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, energy dispersive X-ray spectroscopy, and scanning probe microscopy.The book explores major synthesis methods and functional studies, including: Brillouin spectroscopy; Temperature-dependent Raman spectroscopic studies; Magnetic, ferroelectric, and magneto-electric coupling analysis; Organ-on-a-chip methods for testing nanomaterials; Magnetron sputtering techniques; Pulsed laser deposition techniques; Positron annihilation spectroscopy to prove defects in nanomaterials; Electroanalytic techniques. This is an important reference source for materials science students, scientists, and engineers who are looking to increase their understanding of design and fabrication techniques for a range of multifunctional nanomaterials. Explains the major design and fabrication techniques and processes for a range of multifunctional nanomaterials; Demonstrates the design and development of magnetic, ferroelectric, multiferroic, and carbon nanomaterials for electronic applications, energy generation, and storage; Green synthesis techniques and the development of nanofibers and thin films are also emphasized.
Book Synopsis Fabrication and a Study of the Wetting Properties of Nanostructured Surfaces by :
Download or read book Fabrication and a Study of the Wetting Properties of Nanostructured Surfaces written by and published by . This book was released on 2007 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid behavior at the microscale exhibits large surface to volume ratios increasing the significance of interfacial phenomena. We have studied two microfluidic phenomena that utilize interplay between microstructure and chemical composition. The first one causes liquid droplets to roll off from surfaces with a very high contact angle. This phenomenon is called superhydrophobic behavior, can be controlled by several tuning parameters. The second one changes the wettability of liquids on a dielectric coated surface with electric potential. The experimental studies were done by first fabricating an ordered array of glass nanocones. Fiber drawing and differential glass etching processes were used to produce cone like structures with lattice constant of 40 [Mu]m down to 1.6 [Mu]m. The superhydrophobic behavior was first studied and modeled in a series of nanocone wafers of increasing aspect ratio from .3 to 15. The characterization was done by the measurement of the contact and rolling angles. The Wenzel to Cassie transition of wetting states was observed. The contact angles were calculated by using the 'axisymmetric drop shape analysis' approach. Next, the study of the electrowetting behavior of two broad categories of structured surfaces was done. One was a low aspect ratio surface exhibiting Wenzel wetting and the other was a high aspect ratio surface exhibiting Cassie wetting. The device for experimental study was prepared by coating additional layers, which included conductive gold and dielectric Parylene-C coatings. Studies were done using silicone oil and air as the ambient medium. Images of drops were taken at different voltages and the contact angles were calculated geometrically. Electrowetting on nanocone arrays was modeled using an energybased approach and the obtained theoretical curves were compared to the experimental ones. Oil helped in achieving a large contact angle change. A qualitative analysis of the electrowetting properties of the surfaces was done based on the voltage-contact angle curves.
Book Synopsis Fabrication, Characterization and Applications of Nanostructures Defined by Anodized Surfaces by : Peter Krohne-Nielsen
Download or read book Fabrication, Characterization and Applications of Nanostructures Defined by Anodized Surfaces written by Peter Krohne-Nielsen and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nano-Architectured and Nanostructured Materials by : Yannick Champion
Download or read book Nano-Architectured and Nanostructured Materials written by Yannick Champion and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book identifies new nanometric architectures that would be of particular interest for applications and the technological route to reach them. Nano-architectures of interest are for optical, electrical, magnetic, mechanical properties and reactivity as well as for specific applications such as catalysis and medical diagnostic and drug delivery. Nano-architectures would be metals, alloys, ceramics, semi-conductors, polymers or hybrids inorganic-polymers materials. The book places special emphasis on crucial technical aspects of the fabrication, the control and the characterisation of complex nano-architectures.
Book Synopsis Nanoscale Fabrication, Optimization, Scale-up and Biological Aspects of Pharmaceutical Nanotechnology by : Alexandru Mihai Grumezescu
Download or read book Nanoscale Fabrication, Optimization, Scale-up and Biological Aspects of Pharmaceutical Nanotechnology written by Alexandru Mihai Grumezescu and published by William Andrew. This book was released on 2017-12-11 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoscale Fabrication, Optimization, Scale-up and Biological Aspects of Pharmaceutical Nanotechnology focuses on the fabrication, optimization, scale-up and biological aspects of pharmaceutical nanotechnology. In particular, the following aspects of nanoparticle preparation methods are discussed: the need for less toxic reagents, simplification of the procedure to allow economic scale-up, and optimization to improve yield and entrapment efficiency. Written by a diverse range of international researchers, the chapters examine characterization and manufacturing of nanomaterials for pharmaceutical applications. Regulatory and policy aspects are also discussed. This book is a valuable reference resource for researchers in both academia and the pharmaceutical industry who want to learn more about how nanomaterials can best be utilized. Shows how nanomanufacturing techniques can help to create more effective, cheaper pharmaceutical products Explores how nanofabrication techniques developed in the lab have been translated to commercial applications in recent years Explains safety and regulatory aspects of the use of nanomanufacturing processes in the pharmaceutical industry
Book Synopsis Fabrication and Characterization of One-dimensional Functional Nanostructures by : Chunglin Tsai
Download or read book Fabrication and Characterization of One-dimensional Functional Nanostructures written by Chunglin Tsai and published by . This book was released on 2007 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Functional Nanostructures by : Sudipta Seal
Download or read book Functional Nanostructures written by Sudipta Seal and published by Springer Science & Business Media. This book was released on 2010-06-02 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book about functional nanostructures. Nanocrystalline materials exhibit outstanding properties and represent a new class of structural materials having a wide range of applications. In particular, there is considerable interest in developing nanocrystalline materials to be used as functional materials in aerospace applications, automotive industry, wear applications, etc. Future progress in these high technological applications of nanocrystalline materials depends on development of new methods of their fabrication and understanding of the underlying nano-scale and interface effects causing their unique mechanical properties.
Book Synopsis Nanostructured Materials by : T. Daniel Thangadurai
Download or read book Nanostructured Materials written by T. Daniel Thangadurai and published by Springer Nature. This book was released on 2020-02-27 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the early stages of the development of nanostructures, including synthesis techniques, growth mechanisms, the physics and chemistry of nanostructured materials, various innovative characterization techniques, the need for functionalization and different functionalization methods as well as the various properties of nanostructured materials. It focuses on the applications of nanostructured materials, such as mechanical applications, nanoelectronics and microelectronic devices, nano-optics, nanophotonics and nano-optoelectronics, as well as piezoelectric, agriculture, biomedical and, environmental remediation applications, and anti-microbial and antibacterial properties. Further, it includes a chapter on nanomaterial research developments, highlighting work on the life-cycle analysis of nanostructured materials and toxicity aspects.
