Дисертації з теми "Polymer manipulation"
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Zarrouati, Nadège. "A precision manipulation system for polymer microdevice production." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61927.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 105-107).
Microfluidic science is currently going through a transition from the research laboratories to the industry as the applications and technologies increase and improve. One of the challenges of this transition is the automated production of microfluidic devices for competitive costs and production rates. The objective of this thesis was to design and achieve a fully automated production of polymer-based microfluidic devices. The manipulation must be adapted to all the processing stations and its position repeatability must be within a couple of tens of microns. Based on overall consistency and modularity criterions, we selected a SCARA robot associated with a custom vacuum chuck end effector. The position repeatability was improved by an alignment strategy based on a compliant kinematic coupling. For an ideal part, this strategy divides the position uncertainty of the manipulator by a factor of 5. A model of the flow of materials in the production cell has been optimized to maximize the production rate: the shortest value of the Takt time reaches 280s.
by Nadège Zarrouati.
S.M.
Rachamadugu, Sairaj. "Manipulation of 3D knotted polygons." TopSCHOLAR®, 2012. http://digitalcommons.wku.edu/theses/1162.
Повний текст джерелаKothera, Curt S. "Micro-Manipulation and Bandwidth Characterization of Ionic Polymer Actuators." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/35982.
Повний текст джерелаMaster of Science
Ecker, Christof. "Conformations of single polymer chains on surfaces." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2005. http://dx.doi.org/10.18452/15324.
Повний текст джерелаIn this work single polymer molecules adsorbed onto substrate surfaces were investigated by scanning force microscopy (SFM). The focus was on the shape (conformation) of the molecules, which is of central importance in polymer physics. It is commonly investigated in solutions and with scattering methods. Conformations on surfaces are only little investigated thus far. Often a behavior according to the so-called worm-like chain model is assumed. It is based on the assumption that chain bending results entirely from thermal fluctuations so that the overall chain shape can be described by statistical mechanics. For several model systems single molecules were imaged and the conformation was determined from the images. It was found that the idealistic wormlike chain behavior is only valid for a few systems. Deviations are often remarkable regular: either sine-like undulated or spiral wound. Both characteristics can be explained from the process of adsorption, indicating that molecules are immobile on the substrate so that thermal relaxation is inhibited. Conformations can not only be imaged using the SFM, but also changed in a defined way (nanomanipulation). Manipulation experiments with dendronized polymers the existence of a glassy state for the single polymer. In this state the molecule no longer behaves as a flexible chain but remains its shape, similar to a macroscopic solid body.
Liberski, Albert Ryszard. "Combinatorial polymer synthesis and inkjet printing for cellular control and manipulation." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/11058.
Повний текст джерелаGilje, S. Scott. "Chemical manipulation of graphite for polymer composite and nano electronic applications." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1495960651&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
Повний текст джерелаEcker, Christof. "Conformations of single polymer chains on surfaces non-equilibrium, equilibrium and manipulation /." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=976610140.
Повний текст джерелаHigginbotham, Catrena Pearl. "The characterization and manipulation of the internal pore structure of tetramethoxysilane sol-gels and polymer hybrid gels." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/30556.
Повний текст джерелаZhuang, Wei. "Controlled nanostructures of synthetic and biological polymers investigated by scanning force microscopy techniques." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16210.
Повний текст джерелаPolymeric nanostructures from highly attractive, functional synthetic and biological macromolecules were self-assembled at interfaces and in thin films, and then explored with Scanning Force Microscopy (SFM) techniques, in order to develop a molecular level understanding, which allows to control their properties. A widely used polymer for organic electronics, poly(3-hexylthiophene), was investigated in thin films in order to determine the role of molecular weight for the formation of molecular nanostructures, and the correlation with the corresponding transistor properties and charge carrier mobilities. On the level of single macromolecules, dendronized polymers, were investigated. For the first time, self-folding of single synthetic polymer chains into polymeric duplexes was reported. Moreover, it became possible to detect rare single polymer topologies, such as chain branching, which could not be detected by any other means so far. The complexation of plasmid double-stranded DNA (ds-DNA) with amphiphilic small molecules allowed to control the macromolecular conformation with a “Molecular Workbench”, developed largely within this thesis. It became possible to split, stretch, overstretch, and finally break ds-DNA on molecularly modified graphite surfaces. With a newly developed “SFM blowing” technique, supercoiled ds-DNA and also synthetic block copolymers from DNA and poly(ethyleneglycol) were fully stretched on an atomically flat substrate. Quantitative experiments allowed to estimate rupture forces of ds-DNA on a time scale on the order of as much as half an hour. In summary, this work presents new insight into highly interesting functional polymeric nanostructures as well as new methods for their investigation. The results are highly relevant for a rational development of biologically inspired functional molecular systems, which may ultimately operate close to physical limits as far as the efficient use of matter and energy is concerned.
Daniels-Hafer, Carrie Lynn. "Electrochemical tuning of charge transport at inorganic semiconductor doped conjugated polymer interfaces through manipulation of electrochemical potential /." view abstract or download file of text, 2004.
Знайти повний текст джерелаTypescript. Includes vita and abstract. Includes bibliographical references (leaves 185-196). Also available for download via the World Wide Web; free to University of Oregon users.
Au, Thi Huong. "Optimisation et manipulation d'une source de photons uniques par des structures photoniques 2D et 3D à base de matériau polymère à température ambiante." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN046.
Повний текст джерелаThe thesis has been devoted to study the controlled coupling of a colloidal quantum dot (QD) based single photon source (SPS) into multidimensional polymeric photonic structures by using low-one photon absorption (LOPA) direct laser writing (DLW) technique. The thesis consists of three main parts:The first part addresses the characteristic optimization of the CdSe/CdS based SPS. The excitation wavelength dependence of the QDs was investigated. By using 532 nm, only the core of the QD is excited with the suppression of the Auger effects. Thus, this approach allows for obtaining the suppression of fluorescence intermittency and a stable single-photon emission at ambient conditions. In order to obtain the long-term high fluorescence quality of the QDs, we then studied the influence of the local dielectric medium on the optical properties of the QDs. By incorporating the QDs into a photoresist (SU-8), we demonstrated that the polymeric environment not only enables the long-term preservation of the QD with high photostability but also provides us excellent accessibility to fabricate polymeric structures containing SPS.In the second part, the LOPA-based DLW is employed for the coupling of single QD into various photonic structures. Two devices including submicropillar dielectric antenna and 3D membrane bulleye cavity are theoretically and experimentally investigated to enhance the fluorescence emission of the single QD in terms of far-field angular radiation pattern and the spontaneous radiative emission of the emitter.In the third part, the manipulation of SPS is demonstrated by coupling the single QD into multidimensional magneto-photonic structures. With the aid of an external magnetic field, the controllable movement of the coupled QD was performed in the fluidic environment. The position and orientation of the SPS coupled in the structure were manipulated on demand. The mechanical, magnetic and optical properties of the device are investigated showing the multifunctional capabilities of magneto-photonic structures
Liu, Hao. "Manipulation of self-assembled nanostructures from molecular Janus particles based on polyoxometalates, polyhedral oligomeric silsesquioxanes and [60]fullerene." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1447529892.
Повний текст джерелаAkbarian-Tefaghi, Sara. "Microwave-Assisted Topochemical Manipulation of Layered Oxide Perovskites: From Inorganic Layered Oxides to Inorganic-Organic Hybrid Perovskites and Functionalized Metal-Oxide Nanosheets." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2287.
Повний текст джерелаMarcati, Alain. "Génération de particules de polymères à structure contrôlée par la microfluidique." Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT033G/document.
Повний текст джерелаThis work is full part of process intensification : polymer particles are usually synthesized in batch reactors with solvents, surfactants and stabilizers. In these conditions, particles are obtained with large size distribution. In order to reduce size distribution, particles synthesis is then studied in a continuous process in microchannels in water, without surfactants nor surface treatment of microreactors’ walls. The micron-size scale provides indeed better control of monomer dispersion and prevents droplets coalescence which is the major reason of polydispersity in stirred tank reactors.That is why we have developped microfluidic tools and studied hydrodynamics and droplet generation into microreactors in order to synthetize polymer beads smaller than a hundred microns by direct polymerization of spherical droplets. This work also deals with new material creaction : the objective was also to produce onion-like structures for whom we could choose each layer chemical nature and thickness. We have then analysed manipulation of partciles flow to determine ways of encapsulating core particles. Finally, we also developped a new application related to polymer beads into microchannels : the creation of micropacked chromatography columns
Jelken, Joachim [Verfasser], Svetlana [Akademischer Betreuer] Santer, Marina [Gutachter] Grenzer, and Arri [Gutachter] Priimägi. "Surface relief and bulk birefringence gratings in photo-sensitive polymer films : in-situ probing and manipulation in real time / Joachim Jelken ; Gutachter: Marina Grenzer, Arri Priimägi ; Betreuer: Svetlana Santer." Potsdam : Universität Potsdam, 2020. http://d-nb.info/1223536718/34.
Повний текст джерелаHohn, Nuri [Verfasser], Peter [Akademischer Betreuer] Müller-Buschbaum, Peter [Gutachter] Müller-Buschbaum, and Aliaksandr [Gutachter] Bandarenka. "Polymer Templated Nanostructures for Application in Hybrid Photovoltaics and Li Ion Batteries : Mesoscale Structure Manipulation & Implications for Efficiency / Nuri Hohn ; Gutachter: Peter Müller-Buschbaum, Aliaksandr Bandarenka ; Betreuer: Peter Müller-Buschbaum." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1185638059/34.
Повний текст джерелаBakbak, Selma. "Structural manipulation of conjugated polymers." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-01112006-211158/.
Повний текст джерелаDr. Uwe H. F. Bunz, Committee Chair ; Dr. Laren M. Tolbert, Committee Member ; Dr. Joseph Perry, Committee Member ; Dr. David M. Collard, Committee Member ; Dr. Anselm C. Griffin, Committee Member.
Fedoruk, Michael. "Plasmonic manipulation of thermoresponsive and thermosetting polymers." Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-160075.
Повний текст джерелаWingert, Andreas R. (Andreas Reinhold) 1977. "Development of a polymer-actuated binary manipulator." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/89361.
Повний текст джерелаWang, TingTing. "Acoustic / elastic wave propagation in coupled-resonator waveguides." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD061.
Повний текст джерелаWhen a defect is introduced into a phononic crystal, states localized at the defect appear in the band gaps. They decay rapidly far away from the defect. Therefore, it is possible to localize and guide wave propagation by designing defects in the perfect phononic crystal. Coupled-resonator waveguides based on the coupling effect between a sequence of defect cavities have simultaneously strong wave confinement and low group velocity, and can be used to design rather arbitrary circuits. Furthermore, the propagation of elastic waves in a solid matrix can be controlled through changing fluid fillings based on fluid-solid interaction. Thus, they have essential applications in vibration reduction and noise isolation. In this thesis, the acoustic and elastic waves propagating in both periodic and aperiodic coupled-resonator waveguides are investigated. The fluid-solid interaction in fluid/solid phononic crystals is studied. The work is conducted by combining numerical simulations, theoretical model analysis and experimental investigations
Erdmann, Matthias. "Investigation and electrical manipulation of adsorbed polymers measured by atomic force microscopy." Diss., kostenfrei, 2009. http://edoc.ub.uni-muenchen.de/11479/.
Повний текст джерелаFedoruk, Michael [Verfasser], and Jochen [Akademischer Betreuer] Feldmann. "Plasmonic manipulation of thermoresponsive and thermosetting polymers / Michael Fedoruk. Betreuer: Jochen Feldmann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1038152585/34.
Повний текст джерелаFlegg, Mark Bruce. "Theoretical investigation of mechanisms of formation and interaction of nanoparticles." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/31843/1/Mark_Flegg_Thesis.pdf.
Повний текст джерелаTartsch, Bernd. "Organization, manipulation and motion of brush polymers and low molecular weight amphiphiles at interfaces." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=979080673.
Повний текст джерелаDyer, Patrick E. "Dynamic control of active textiles : the integration of nickel-titanium shape memory alloys and the manipulation of woven structures." Thesis, University of Brighton, 2010. https://research.brighton.ac.uk/en/studentTheses/dac52061-4aaa-4af6-a4c2-3fd5e6c4961f.
Повний текст джерелаFelicio, Perruci Gustavo Felicio. "SHEAR BAND MANIPULATION IN POLYMERIC HONEYCOMB STRUCTURES USING RELIEF HOLES AND DIC ANALYSIS." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2884.
Повний текст джерелаWeis, Jonathan G. (Jonathan Garrett). "Manipulating Conjugation in electronic polymers and graphitic materials: chemosensors, precursor routes, and self-assembly." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98786.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references.
In Chapter 1, we synthesize dithienobenzotropone-based conjugated alternating copolymers by direct arylation polycondensation. Post-polymerization hydride reduction furnishes cross-conjugated copolymeric hydrogels that undergo phosphorylation and subsequent ionization upon exposure to chemical warfare agent (CWA) mimics. The resulting conjugated, cationic copolymer is intensely colored and facilitates spectroscopic and colorimetric detection of CWA mimics in solution and as a thin film. Similarly, we report the incorporation of CWA-responsive units into random copolymers prepared by ringopening metathesis polymerization (ROMP) to create highly modular, chromogenic thin films. In Chapter 2, we explore homoconjugated polynorbornadienes possessing various electron-withdrawing groups as polymeric precursors to electron-accepting poly(cyclopentadienylene vinylene) derivatives. Tungsten oxo alkylidene catalysts were utilized to polymerize a variety of 7-isopropylidene- and 7-oxa-2,3-disubstituted norbornadienes in a cis-highly tactic fashion by ROMP. We further demonstrate the excellent scope of tungsten oxo complexes by polymerizing norbornadienes that are unreactive with traditional molybdenum-, tungsten-, and ruthenium-based catalysts. In Chapter 3, we employ atomic force microscopy (AFM) and scanning tunneling microscopy (STM) to examine graphene oxide (GO) samples with gradations of (de)oxygenation. We analyze the roughness of the apparent height in STM topographic measurements - i.e. the "apparent roughness" - and report a correlation between increasing deoxygenation and decreasing surface roughness. The "apparent roughness" therefore serves as a supplemental technique for analyzing samples of GO. Furthermore, we report the first example of using an STM tip to locally reduce GO without local destruction of the graphene sample. In Chapter 4, we exploit the extraordinary self-recognition properties of deoxyribonucleic acid (DNA) to assemble single-walled carbon nanotubes (SWCNTs) in a controllable manner. Networks of SWCNTs with three-way junctions could be constructed in solution or sequentially on a surface. We envision that more complex nanoscale architectures and circuits can be prepared in this bottom-up manner. In Chapter 5, we introduce halogen bonding in SWCNT-based chemiresistive gas sensors. These chemiresistors were prepared by ball milling of SWCNTs and selectors, compression into a pellet, and mechanical abrasion between gold electrodes on paper. We demonstrate that sensing responses reflect halogen bonding trends, with some exceptions. The predominant signal transduction mechanism is likely attributed to swelling of the insulating haloarene matrix.
by Jonathan G. Weis.
Ph. D.
Lorcy, Jean-Marc. "Étude de nanofils coaxiaux de coeur nickel et gaine PPV pour la manipulation magnétique d'objets luminescents." Nantes, 2009. http://archive.bu.univ-nantes.fr/pollux/show.action?id=e754f0bd-4773-42df-99e7-66c3afd1463b.
Повний текст джерелаAn important part of nanotechnology concerns the elaboration of organic nanomaterials in relation with their numerous applications. Devices with enhanced capabilities can be prepared by combining and assembling novel nanostructured materials which act as building blocks (bottom-up strategy). At the interface between material science and nanophysics, coaxial hybrid metal-polymer nanowires have been developed. These successfully synthesised nanowires own a nickel core and a poly(p-phenylene vinylene) (PPV) shell. Coaxial Poly (methyl methacrylate) (PMMA)/PPV have also been effectively produced. A template-based strategy has been developed which combines a wet-chemical technique and electrodeposition within nanoporous membranes. Morphological, structural and chemical characterization by means of electron microscopy and related techniques demonstrate unambiguously that coaxial nickel/PPV nanowires have been successfully synthesized. Moreover, modification of their optical and magnetic properties due to the nanoscale and the core–shell structure has been studied. The nickel-PPV nanowires exhibit a slightly blueshifted photoluminescence (PL), which is directly related to the tubular morphology of the PPV shell. The effect of the nickel core on the PL intensity of the PPV shell is discussed. The nanowires exhibit a ferromagnetic behaviour with a magnetization easy axis along the wire axis. These magnetic properties as well as the mechanical reinforcement of the polymer nanotube by the metallic core allow the magnetic manipulation of the nanowires. It opens the way to use this kind of system as multifunctional building blocks for bio-applications for example
Ben, Messaoud Tahar. "Effet laser en microcavités symétriques et asymétriques à base de polymère luminescent." Cachan, Ecole normale supérieure, 2003. http://www.theses.fr/2003DENS0039.
Повний текст джерелаLorcy, Jean-Marc. "Étude de nanofils coaxiaux de cœur nickel et gaine Poly (p-phénylène vinylène) pour la manipulation magnétique d'objets luminescents." Phd thesis, Université de Nantes, 2009. http://tel.archives-ouvertes.fr/tel-00569080.
Повний текст джерелаAndersson, Magnus. "Construction of force measuring optical tweezers instrumentation and investigations of biophysical properties of bacterial adhesion organelles." Doctoral thesis, Umeå : Department of Physics, Umeå Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1425.
Повний текст джерелаSaxena, Shubham. "Nanolithography on thin films using heated atomic force microscope cantilevers." Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-08302006-223629/.
Повний текст джерелаColinjivadi, Karthik Subramanian. "Polymer microgrippers for biological cell manipulation /." 2007. http://proquest.umi.com/pqdweb?did=1441203951&sid=2&Fmt=2&clientId=10361&RQT=309&VName=PQD.
Повний текст джерелаGunari, Nikhil Arun [Verfasser]. "Visualization, manipulation and force spectroscopy of cylindrical polymer brushes / Nikhil Arun Gunari." 2005. http://d-nb.info/978448855/34.
Повний текст джерелаHsiao, Ying-Li, and 蕭英利. "Manipulation of Random laser from dye-doped polymer dispersed LCs in capillary." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/7af5ne.
Повний текст джерела國立臺北科技大學
光電工程系研究所
102
The resonance characteristics of random lasers from dye-doped polymer dispersive liquid crystals (DD-PDLCs) within capillary tubes are investigated. The DD-PDLCs were prepared by doping laser dye as the gain medium and mixed different concentration of monomer into the nematic liquid crystals. Then, the DD-PCLC mixtures were filled into the capillary tubes by the capillary effect and then exposed UV light to make the monomer solidify into a polymer. Through excitation by the Q-switched pulse, the emission spectra from the capillary tube revealed multiple emission spikes with narrower emission linewidth due to enhancement of the light scattering. Besides, the number of emission spikes, FWHM and lasing threshold from the DD-PDLCs were determined by the density and grain size of the polymer clusters within the PDLC mixtures through the alternation of the concentration of the doping monomer. Furthermore, the lasing performance of the DD-PDLCs in the capillary tube could be controlled by temperature. At a lower temperature, more emission spikes at longer wavelengths were excited, and the laser revealed a relatively high Q-factor accompanied with relatively low threshold pump energy owing to the increase in the birefringence of the liquid crystal molecules so that multiple recurrent light scattering would be efficiently enhanced.
Banda, Sumanth. "Electric field manipulation of polymer nanocomposites: processing and investigation of their physical characteristics." 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2352.
Повний текст джерелаSun, Dazhi. "Colloidal Manipulation of Nanostructures: Stable Dispersion and Self-assembly." Thesis, 2009. http://hdl.handle.net/1969.1/150919.
Повний текст джерелаKim, Bokyung. "The manipulation and characterization of patterned surfaces: I. Oriented nanoscale porous materials II. Drop mobility on surfaces with patterned wettability." 2010. https://scholarworks.umass.edu/dissertations/AAI3427546.
Повний текст джерела"A PVDF-based sensing system for automated micro-manipulation." 2002. http://library.cuhk.edu.hk/record=b5891131.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2002.
Includes bibliographical references (leaves 110-114).
Abstracts in English and Chinese.
摘要 --- p.i
ABSTRACT --- p.ii
ACKNOWLEDGMENTS --- p.iii
TABLE OF CONTENTS --- p.iv
LIST OF FIGURES --- p.vi
Chapter 1. --- Introduction --- p.1
Chapter 1.1 --- Background and Motivation --- p.1
Chapter 1.2 --- Objective of the project --- p.4
Chapter 1.3 --- Organization of the thesis --- p.5
Chapter 2. --- Literature Review --- p.7
Chapter 2.1 --- Control on Micro-Manipulation --- p.7
Chapter 2.1.1 --- Visual Feedback Control --- p.8
Chapter 2.1.2 --- Sensor-Based Feedback Control --- p.9
Chapter 2.1.3 --- Bilateral Control --- p.9
Chapter 2.2 --- Force Sensing System on Micro-Manipulation --- p.10
Chapter 2.3 --- PVDF Sensor --- p.11
Chapter 2.4 --- Summary of the Literature Review --- p.12
Chapter 3. --- Micro-Manipulation --- p.14
Chapter 3.1 --- Introduction of Micro-Manipulation --- p.14
Chapter 3.2 --- Probe Station --- p.14
Chapter 3.2.1 --- Micromanipulators --- p.15
Chapter 3.2.2 --- Microscopes --- p.15
Chapter 4. --- Piezoelectric Polyvinylidence Fluoride (PVDF) Sensor --- p.16
Chapter 4.1 --- Charteristic of PVDF Sensor --- p.16
Chapter 4.1.1 --- Piezoelectric Properties --- p.16
Chapter 4.1.2 --- Dimensions of the PVDF Sensor --- p.18
Chapter 4.2 --- Comparison of Piezoelectric Materials --- p.19
Chapter 5. --- Theoretical Analysis of PVDF Sensor --- p.21
Chapter 5.1 --- Sensitivity of PVDF Sensor --- p.21
Chapter 5.2 --- Relationship between the Deflection and the Force of the PVDF --- p.22
Chapter 5.3 --- Calculation of the Spring Constant K of the PVDF --- p.23
Chapter 5.4 --- Simulation on the output from the PVDF Sensor --- p.23
Chapter 6. --- Experimental Analysis of PVDF Sensor --- p.26
Chapter 6.1 --- Force-Deflection Diagram --- p.26
Chapter 6.2 --- Frequency Response of the PVDF Sensor --- p.27
Chapter 7. --- 1-D PVDF-Based Sensing System --- p.30
Chapter 7.1 --- Original Design of the Sensing System --- p.30
Chapter 7.1.1 --- Plastic pipe and adapter --- p.31
Chapter 7.1.2 --- PVDF Sensor --- p.32
Chapter 7.1.3 --- Probe-tip holder --- p.32
Chapter 7.2 --- Current Design of the Sensing System --- p.32
Chapter 7.3 --- Analysis of the Sensing System --- p.34
Chapter 7.3.1 --- Frequency Response of the Sensing System --- p.34
Chapter 7.3.2 --- Sensitivity of the Sensing System --- p.41
Chapter 8. --- Experiments on 1-D PVDF Sensing System --- p.49
Chapter 8.1 --- Experimental Setup of the 1-D Sensing System --- p.49
Chapter 8.1.1 --- Programmable Micromanipulator --- p.50
Chapter 8.1.2 --- Charge Amplifier --- p.51
Chapter 8.2 --- Calibration of the 1-D Sensing System --- p.53
Chapter 8.2.1 --- Noise Signal from the system --- p.53
Chapter 8.2.2 --- Signal from vibration --- p.55
Chapter 8.3 --- Experimental Results on touching a substrate --- p.60
Chapter 8.3.1 --- Description --- p.60
Chapter 8.3.2 --- Results from touching a substrate --- p.62
Chapter 8.3.3 --- Analysis of the deflection after touched a substrate --- p.67
Chapter 8.4 --- Experimental Results on touching a micro mirror --- p.68
Chapter 8.4.1 --- Description --- p.68
Chapter 8.4.2 --- Results --- p.70
Chapter 8.5 --- Experimental Results on lifting a mass platform --- p.74
Chapter 8.5.1 --- Description --- p.74
Chapter 8.5.2 --- Results --- p.76
Chapter 9. --- Modification of 1-D Sensing System --- p.79
Chapter 9.1 --- Design of the system --- p.79
Chapter 9.2 --- Experimental Setup of the system --- p.80
Chapter 9.3 --- Experimental Results on lifting a mass platform --- p.81
Chapter 10. --- 2-D PVDF-Based Sensing System --- p.90
Chapter 10.1 --- Design of the Sensing System --- p.90
Chapter 10.2 --- Experimental Setup --- p.91
Chapter 10.3 --- Calibration of the 2-D Sensing System --- p.92
Chapter 10.3.1 --- Noise Signal from the system --- p.92
Chapter 10.4 --- Experiments Results on touching a substrate --- p.94
Chapter 11. --- Experimental Analysis --- p.97
Chapter 11.1 --- Data Acquisition --- p.97
Chapter 11.2 --- Spectrum Analysis of the Experimental Data --- p.101
Chapter 12. --- Conclusion --- p.103
Chapter 13. --- Future Work --- p.105
Chapter 13.1 --- Control of the Sensing System --- p.105
Chapter 13.2 --- Tele-operation System on force feedback sensing system --- p.107
Chapter A. --- Appendix --- p.109
Chapter A. 1 --- Procedures in using probe station --- p.109
Bibliography --- p.110
U-Kaew, Ananchai. "Turbulence manipulation in pipe flow by means of swirl, polymer additives and suspensions of nanoparticles in water." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3285740.
Повний текст джерелаAngstadt, David Charles. "An investigation of active melt manipulation during polymer processing and its effects on part mechanical properties /." Diss., 2004. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3147312.
Повний текст джерелаEcker, Christof [Verfasser]. "Conformations of single polymer chains on surfaces : non-equilibrium, equilibrium and manipulation / von Christof Ecker." 2004. http://d-nb.info/976610140/34.
Повний текст джерелаChen, Jun-Lin, and 陳俊霖. "A polarizer-free reflective display based on droplet manipulation on a liquid crystal and polymer composite film." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/15991468731775552952.
Повний текст джерела國立交通大學
顯示科技研究所
98
A novel reflective polarizer-free display realized by controlling the wettability of a liquid crystal and polymer composite film (LCPCF).The wettability of the LCPCF changes because of the electrically tunable orientation of the liquid crystal directors anchored among the polymer grains. We can manipulate a movable color droplet on the LCPCF by a wettability gradient owning to the distribution of electric field. To realize a reflective polarizer-free display, we put a hole -patterned black matrix above the LCPCF. The color of the light passing through the hole changes as the color droplet moves. In this paper, we analyze the mechanism of the droplet movement on the LCPCF by form the surface morphology and the surface tension properties. We also discuss the effects of the applied pulse voltage and the thickness of the LCPCF on the performance of the display. The characteristics of this display are color-filter-free, polarizer-free, wide viewing angle, bistable and reflective operation, thus it is suitable for the application of e-paper. Other potential applications of the LCPCF are liquid lenses, bio-sensors, and microfluidic devices.
Liou, Sz-Chian, and 劉思謙. "Structural characterization and manipulation of phase development for calcium phosphate ceramics and polymer nanocomposites prepared by chemical-precipitated synthesis." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/78683794070884129105.
Повний текст джерела國立交通大學
材料科學與工程系
91
Part 1 Structural characterization and phase transformation of Chemically-precipitated Apatite The Ca-deficient apatite (CDHA) was prepared from the precursors of (CH3COO)2CaxH2O 、Ca(NO3)24H2O and H3PO4 、 (NH4)H2PO4 to investigate the transformation mechanism of -tricalcium phosphate (-TCP). X-ray diffraction (XRD) analysis shows that the development of -TCP is not via direct reaction between Ca and P for all the different combinations between Ca and P precursors. The activation energy of -TCP formation with (NH4)H2PO4 as precursor was higher than that with H3PO4. Following the Johnson-Mehl-Avrami equation, the reaction kinetics of -TCP phase formation is found one-dimension growth with interface-controlled and diffusion controlled growth depending on the annealing temperature. There exists a transition between 750oC and 825oC, and the transition rate from interface-controlled to diffusion-controlled growth is precursor-dependent. Nano-sized calcium-deficient apatitic (CDHA) crystals with Ca/P ratio from 1.5 to 1.67 were synthesized using wet chemical method and needle-like shape with 5-10 nm in diameter and 40-50 nm in length was observed. The structural environment of the Ca atoms in all the CDHA nano-crystals has been investigated using EXAFS, XANES and EELS. The results reveal that a maximum Fourier transform amplitude occurs at the apatite with Ca/P ratio of 1.67 and the structural disorder increase following the sequence of 1.67> 1.5> 1.6> 1.55. Similar phenomenon is also observed in both of K-edge XANES and L2,3-edge ELNES in Ca atom. The structural analysis further demonstrates that different chemical and biological properties among these CDHA nano-crystals with Ca/P ratio from 1.5 to 1.67 is primarily due to the effect of stoichiometry and non-stoichiometry as compared to the structural order-disorder. In addition, nano-sized -tricalcium phosphate (-TCP) with 50nm in diameter at room temperature was synthesized and studied under different alcohol solvents. The phase evolution from CaHPO4, intermediate amorphous calcium phosphate (ACP) phases (including ACP1 and ACP2 with different structures) to final -TCP with increasing aging time was observed. The formation of -TCP phase is favored due to the incorporation of carbonate which can suppress the transformation of ACP1 phase. High-resolution transmission electron microscopy (HRTEM) confirms that parts of -TCP contain an incompletely transferred structure of straight and wavy fringes and the observations of abnormal diffraction intensity and superlattice diffraction in selected-area diffraction patterns (SADP) further confirm the chemical order-disorder characteristics in -TCP structure and can be used to elucidate the resorbility of -TCP in either in-vivo or in-vitro environment due to the imperfection in -TCP crystal. Part 2 Calcium phosphate / Polyacrylic-acid nanocomposites Calcium phosphate ceramics (CPCs) were prepared via an in-situ formation in the presence of low molecular weight (Mw-2000) polyacrylic acid (PAA) polymer under water-methanol (WM) mixture at ambient temperature. The PAA polymer was employed as both structure-directing agent and crystallization retardant to manipulate the development of resulting CPCs nano-crystallites which are observed to show a core-shell configuration with a thin layer of polyacrylic acid (PAA) molecules. A resulting phase evolution map with respect to the developing phases of calcium-deficient hydroxyapatite (CDHA), -tricalcium phosphate (-TCP), and an intermediate amorphous phase (termed as amorphous calcium phoshate, ACP) that were structurally and spectroscopically identified, was constructed in terms of fractions of water-to-methanol proportions and concentration of PAA. It is found that the intermediate ACP phase was not able to develop, instead, pure CDHA and -TCP was developed, irrespective of the concentration of PAA, for the solutions in both water-rich and methanol-rich regions, respectively. For conditions in between, i.e., with methanol fractions of 15%-90%, ACP appeared only when the PAA fell in a limited concentration range. The mechanism for phase development is tentatively proposed. Calcium-deficient apatitic (CDHA) crystals with core-shell nanostructure of needle-like shape of 5-10 nm in diameter and 20-80 nm in length were prepared via an in-situ formation in the presence of high molecular weight (Mw-450000) of polyacrylic acid (PAA) under aqueous solution of different pH values ranging from 9 to 11. Nanostructure of the resulting crystals was investigated, showing a core-shell configuration with a thin layer of PAA shell of about 1 nm thick. Aspect ratio (AR) of the needlelike composite was found to depend on the concentration of the PAA and solution pH. At lower solution pH, crystal growth was inhibited, i.e., leading to a decreased AR, with increase of PAA concentration, whilst an increased AR was detected at higher solution pH, suggesting a preferential growth of the CDHA nano-crystals. Mechanism of such preferential growth was tentatively proposed and is suggested to correct with PAA adsorption along the long axis of the needlelike nanoparticles. Colloidal apatitic nanosphere with size of 2-5 nm in diameter was synthesized in the presence of low-molecular-weight poly(acrylic acid), PAA. The PAA, which has long been recognized as inhibitor for phase formation of hydroxyapatite, is acting as a structure-directing agent in this study. Experimental observation suggests the existing of critical amount of the PAA, above which, morphological evolution, from nanoneedle to nanosphere, was observed. Further incorporation of high-molecule-weight PAA formed hybrid composites where highly optically transparent nanocomosites can be synthesized, even with a nano-apatite load up to 35 wt%. Transmission electron microscopy (TEM) observation indicated that the apatitic nanospheres were uniformly distributed within the matrix with a well compatiblized interface with the matrix.
"Micro parylene actuators for aqueous cellular manipulation." 2003. http://library.cuhk.edu.hk/record=b5891627.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2003.
Includes bibliographical references (leaves 92-94).
Abstracts in English and Chinese.
ABSTRACT --- p.i
摘要 --- p.iii
ACKNOWLEDGEMENTS --- p.iv
PUBLISHED PAPERS --- p.vi
TABLE OF CONTENTS --- p.vii
LIST OF FIGURES --- p.ix
LIST OF TABLES --- p.xi
Chapter Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Traditional methods of cell manipulation --- p.1
Chapter 1.2 --- New methods of cell manipulation using MEMS technology --- p.2
Chapter 1.2.1 --- Electrostatic actuation --- p.2
Chapter 1 2.2 --- Shape memory effect --- p.4
Chapter 1.2.3 --- Pneumatic --- p.5
Chapter 1.2.4 --- Electromagnetic --- p.5
Chapter 1.2.5 --- Thermal --- p.6
Chapter 1.3 --- Objective of this project --- p.1
Chapter Chapter 2 --- Literature review --- p.11
Chapter Chapter 3 --- "Design, modeling and heat transfer analysis" --- p.14
Chapter 3.1 --- Design and the temperature-radius relationship of thermal actuators --- p.14
Chapter 3.2 --- Heat transfer analysis --- p.17
Chapter 3.2.1 --- Heat dissipation from the actuator --- p.18
Chapter 3.2.2 --- Thermal transient response in liquid environment --- p.23
Chapter 3.3 --- "Temperature, radius of curvature and tip deflection and actuation voltage relationship" --- p.24
Chapter Chapter 4 --- Fabrication process of the thermal actuators --- p.28
Chapter 4.1 --- Basic processes involved in fabricating the thermal actuators --- p.28
Chapter 4.1.1 --- Photolithography --- p.28
Chapter 4.1.1.1 --- Spin on and pattern photoresist --- p.29
Chapter 4.1.1.2 --- Methods for alignment --- p.31
Chapter 4.1.2 --- Lift off and etching processes --- p.33
Chapter 4.1.3 --- Sacrificial release process --- p.35
Chapter 4.1.4 --- Deposition --- p.38
Chapter 4.1.4.1 --- Sputtering --- p.39
Chapter 4.1.4.2 --- Thermal evaporation --- p.39
Chapter 4.1.4.3 --- Thermal oxidation --- p.40
Chapter 4.1.4.4 --- Parylene deposition --- p.41
Chapter 4.2 --- Fabrication process of thermal actuators/grippers --- p.45
Chapter 4.2.1 --- Fabrication of thermal actuators --- p.45
Chapter 4.2.1.1 --- Mask design and making --- p.45
Chapter 4.2.1.2 --- Process flow --- p.49
Chapter 4.2.1.3 --- Fabricated samples --- p.53
Chapter 4.2.1.4 --- Problems encountered during fabrication process --- p.54
Chapter 4.2.2 --- Fabrication of multi-finger gripper --- p.55
Chapter 4.2.2.1 --- Mask design --- p.55
Chapter 4.2.2.2 --- Process flow --- p.57
Chapter 4.2.2.3 --- Fabricated samples --- p.57
Chapter Chapter 5 --- Testing thermal actuators --- p.58
Chapter 5.1 --- Actuation by applying voltage (underwater) --- p.58
Chapter 5.1.1 --- Experimental setup --- p.58
Chapter 5.1.2 --- Experimental results --- p.59
Chapter 5.1.3 --- Discussion --- p.63
Chapter 5.2 --- Actuation by water bath heating --- p.66
Chapter 5.2.1 --- Experimental setup --- p.66
Chapter 5.2.2 --- Experimental results --- p.66
Chapter 5.2.3 --- Discussion --- p.68
Chapter 5.3 --- Frequency response and force analysis --- p.69
Chapter 5.3.1 --- Frequency response --- p.69
Chapter 5.3.2 --- Force analysis --- p.70
Chapter Chapter 6 --- Cell grasping system --- p.73
Chapter 6.1 --- Demonstration of cell grasping using single arm gripper --- p.73
Chapter 6.2 --- MEMS chip with multi-finger grippers --- p.75
Chapter 6.2.1 --- Mask design for MEMS chip --- p.76
Chapter 6.2.2 --- Actuation of thermal gripper in air --- p.78
Chapter 6.2.3 --- Demonstration of actuation and cell grasping --- p.79
Chapter 6.2.4 --- A flexible cell grasping motion --- p.80
Chapter 6.3 --- Proposed cell grasping system --- p.82
Chapter Chapter 7 --- Summary and future work --- p.83
Chapter 7.1 --- Summary --- p.83
Chapter 7.2 --- Future work --- p.84
APPENDIX --- p.87
BIBLIOGRAPHY --- p.92
Gupta, Suresh. "Manipulating polymers and composites from the nanoscopic to microscopic length scales." 2008. https://scholarworks.umass.edu/dissertations/AAI3325120.
Повний текст джерелаWang, Wei, and 王瑋. "Bulk-heterojunction polymers in optically-induced dielectrophoretic devices for the manipulation of microparticles." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/59439344422835249302.
Повний текст джерела國立成功大學
工程科學系碩博士班
97
This paper presents a new material for fabricating optically-induced dielectrophoretic (ODEP) devices, which can manipulate microparticles or cells by using moving light patterns. A thin film of a bulk-heterojunction (BHJ) polymer, a mixture of regioregular poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester, is used as a light-activated layer. When illuminated by a projected light beam, the photo-induced charge carriers created by the electron transfer of excitons at a donor/acceptor interface in the BHJ layer, disturbs the uniformly-distributed electric field applied on the ODEP devices. A negative DEP force is then generated by virtual electrodes defined by the optical images from a computer-programmable projector to manipulate microparticles, thus providing a flexible platform for particle manipulation. The effect of the polymer thickness and composition on the magnitude of the generated DEP force has been extensively investigated. The maximum particle velocity and the drag force applied on 20 �慆 diameter polystyrene beads are measured to be around 202 �慆/s and 38.2 pN, respectively, for a device with a 497-nm thick BHJ layer. The lifetime of the developed device is also explored. This BHJ polymer may provide a promising candidate for future ODEP devices capable of nanoparticle and cell manipulation. The amorphous silicon substrate was constrained by its complex manufacture procedure. On the contrary, the polymer thin film chip can be spin-coated at a relatively low temperature for mass production of the ODEP chips. It is also feasible to fabricate the ODEP device on large-area and flexible polymer substrates through a continuous roll-to-roll coating process. Furthermore, the low-cost advantage enables the chips to be disposable in biological applications.
Gu, Weiyin. "Manipulating block copolymer self-assemblies in bulk and thin films by thermal and solvent annealing." 2013. https://scholarworks.umass.edu/dissertations/AAI3603092.
Повний текст джерелаShu-JuLin and 林素如. "Manipulation of Micro-Particles by Flexible Optically-Induced Dielectrophoretic Devices Fabricated by Bulk-Heterojunction Polymers." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/23001846718607256449.
Повний текст джерелаKrishnacharya. "Manipulation of Wetting Morphologies in Topographically Structured Substrates." Doctoral thesis, 2007. http://hdl.handle.net/11858/00-1735-0000-0006-B467-F.
Повний текст джерела