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Dissertations / Theses on the topic 'Langmuir-Blodgett Techniques'

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Published: 7 September 2023

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1

Baker, S. "Phthalocyanine Langmuir-Blodgett films and their associated devices." Thesis, Durham University, 1985. http://etheses.dur.ac.uk/7589/.

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Interest in the Langmuir-Blodgett (LB) technique has led to a number of investigations into different types of materials that can be deposited in the form of monolayers. For example, as well as the classic long Cham fatty acids and alcohols, materials such as polymerisable molecules, aromatic hydrocarbons and dye substances can now all be produced in monomolecular form. Unfortunately, few of these materials yet fulfil the requirements of mechanical and thermal stability that will be necessary if LB films are to be used commercially. This work has dealt with the use of phthalocyanine, a substan
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2

Hamilton, Richard. "Materials for molecular electronics : fabricated by Langmuir-Blodgett techniques and self-assembly." Thesis, Cranfield University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401624.

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3

Sandras, Florent. "Etude de l'organisation de films ultraminces de protéines par microspectroscopie Raman et autres techniques." Bordeaux 1, 2005. http://www.theses.fr/2005BOR12990.

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Cette étude porte sur l'organisation en films ultraminces de protéines fortement tensioactives et sur leurs interactions avec des lipides. Elle a été réalisée principalement par microspectroscopie Raman confocale associée à d'autres méthodes complémentaires telles que des mesures de tension superficielle, la microscopie à l'angle de Brewster et la spectroscopie infrarouge PM-IRRAS. Le signal Raman de tels systèmes étant très faible, la première étage de ce travail a consisté à mener des tests comparatifs entre différents types de caméra CCD de technologies récentes afin d'optimiser la détectio
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4

Paulov, Valeri. "New techniques for the fabrication of biosensors based on nad (P) + dependent dehydrogenases." Doctoral thesis, Universitat Rovira i Virgili, 2005. http://hdl.handle.net/10803/8533.

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DE LA TESIS EN CASTELLANO<br/><br/>Antecedentes<br/><br/>Un avance importante en el campo de química analítica se hizo por Clark y Lyons en los años setenta. Ellos propusieron acoplar la especificidad de la enzima glucosa oxidasa con la transducción electroquímica de la señal en "biosensores". En general, los biosensores son artefactos integrados autocontenidos, capazes de proporcionar información analítica, cuantitativa utilizando un elemento biológico de reconocimiento (receptor bioquímico) que se retiene en contacto espacial directo con un elemento de transducción. Posteriormente, los
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5

Snizhko, D., Yu Zholudov, A. Kukoba, and G. Xu. "Langmuir–Blodgett technique versatility for electrode modification and its ECL application." Thesis, ISBC 2018, 2018. http://openarchive.nure.ua/handle/document/5794.

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In the work 9,10-diphenyl anthracene and rubrene were used to decorate an amphiphilic polymer matrix polymethylmethacrylate (PMMA) lm. ITO electrodes equipped with LB lm were used in ECL experiment with tripropylamine co-reactant. Obtained ECL response satis es expectation in looking for a new technology for ECL sensor fabrication.
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6

Iwantono, M. "Studies on cadmium sulphide nanoparticles formed by the Langmuir-Blodgett technique." Thesis, Sheffield Hallam University, 2003. http://shura.shu.ac.uk/20169/.

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In this project, the formation and characterisation of CdS nanoparticles embedded within Langmuir-Blodgett (LB) films have been studied systematically. CdS nanoparticles were formed within calix[8]arene (CA) and stearic acid (SA) Cd-salt LB films by exposure to H[2]S gas at room temperature. The AFM images of the treated SA and CA bilayers show CdS clusters with lateral dimensions in the range of 20-30 nm and 10-15 nm, respectively. These particles are pseudo two-dimensional and have a shape of hexagonal platelets which is most likely consequence of their wurtzite structure. Calculations of th
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7

FIOL, CATHERINE. "Elaboration d'architectures moleculaires par la technique de langmuir-blodgett : application aux biocapteurs." Paris 7, 1993. http://www.theses.fr/1993PA077152.

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Nous presentons ici le developpement d'un biocapteur de glucose base sur la technique de langmuir-blodgett. Cette approche consiste en l'elaboration de structures organisees dans lesquelles est immobilisee une enzyme (la glucose oxydase). Une couche monomoleculaire mixte acide gras/enzyme formee a la surface d'une solution aqueuse dans une cuve de langmuir est transferee sur un support solide recouvert d'or. Nous nous sommes attaches a definir les proprietes physico-chimiques des films deposes. Par spectroscopies (ir et uv) nous avons pu correler la quantite d'acide behenique et de glucose oxy
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8

Biddle, M. B., S. E. Rickert, J. B. Lando, and André Laschewsky. "The use of the Langmuir-Blodgett technique to obtain ultra-thin polar films." Universität Potsdam, 1989. http://opus.kobv.de/ubp/volltexte/2009/1718/.

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The piezoelectric and pyroelectric properties of oriented films possessing dipole moments are increasingly being used in pressure, acoustic, thermal and optical devices. The performance of these devices in many applications may be enhanced by thin-film technology.The developing Langmuir-Blodgett thin-film deposition technique offers the opportunity to obtain highly oriented and uniform organic-based films in the 10–5000 nm thickness range. Special techniques must be used, however, to assemble these molecules in such a way as to result in polar multilayer films. Several possible deposition tech
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9

Shin, Du Hyun. "Host-Guest Assemblies for Functional Interfaces via Langmuir-Blodgett and Self-Assembly Technique." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/54573.

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Various technologies depend on interfacial events that are influenced by various molecular interactions at a solid-liquid interface. The functionality of a surface plays an important role in many applications such as catalysis, sensing, and bio-compatibility, which can benefit from distinctive chemical and physical surface properties. To create tailor-made functional surfaces, surface host-guest assemblies based on Langmuir-Blodgett and self-assembly technique have been employed as a model system as they may offer the potential ability to regenerate surface properties via intercalation of vari
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10

PORTEU, DE LA MORANDIERE FLORENCE. "Conception et realisation par la technique langmuir-blodgett d'edifices moleculaires polymerises dans le plan." Paris 6, 1991. http://www.theses.fr/1991PA066287.

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Le present travail concerne la realisation d'edifices supramoleculaires organises en film langmuir-blodgett (lb). Les molecules utilisees appartiennent a la famille des porphyrines. Elles sont tetrafonctionnalisees et peuvent etre transferees suivant une methode semi-amphiphile. La premiere voie abordee concerne la realisation de divers edifices moleculaires par la methode amphiphile. Elle est basee sur une reconnaissance moleculaire a l'interface air-eau, faisant appel aux forces de coulomb, entre deux macrocycles differemment tetrafonctionnalises. Le simple melange equimolaire d'un macrocycl
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11

Sakakibara, Keita. "Fabrication of cellulose supramolecular architectures toward photocurrent generation systems by the Langmuir-Blodgett technique." Kyoto University, 2008. http://hdl.handle.net/2433/136592.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第13865号<br>農博第1680号<br>新制||農||952(附属図書館)<br>学位論文||H20||N4332(農学部図書室)<br>UT51-2008-C781<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授 中坪 文明, 教授 西尾 嘉之, 教授 木村 恒久<br>学位規則第4条第1項該当
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Tahghighi, Mohammad. "Fabricating ultrasensitive metal nano-structures with Langmuir-Blodgett technique to improve plasmonic response of SERS." Doctoral thesis, Universitat de Barcelona, 2022. http://hdl.handle.net/10803/673304.

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Nanoparticle self-assembly is a versatile and coherent strategy for the development of functional nanostructured materials, offering low-cost and scalable methods that can be fine-tuned for many different specific application. Functionalized nanoparticles could be spread at the interface of liquid/gas by means of self-assembly. In this work, we demonstrate a pathway for the fabrication of tailorable quasi two-dimensional lattices of gold nanoparticles with several core sizes and shapes (5, 10, 20, 30, 40 nm and nano-urchin) to be used in surface enhanced Raman scattering (SERS) detection of bi
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13

Dubreuil, Nicolas. "Etude de films mixtes d'acide gras et d'enzyme élaborés par la technique de Langmuir-Blodgett." Rouen, 1995. http://www.theses.fr/1995ROUES049.

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Le but de ce travail a été de caractériser des films mixtes acide gras/enzyme élaborés par la technique de Langmuir-Blodgett. L'acide gras utilisé est l'acide béhénique (AB) et l'enzyme est la glucose oxydase (GOx). Les études sur le film à l'interface eau/air (isothermes de compression, stabilité, hystérésis, microscopie à l'angle de Brewster) ont montré que l'enzyme s'adsorbait entre les molécules d'acide béhénique et sous le film, ce qui a pour effet de stabiliser le film. Ces études ont aussi permis de mettre au point un protocole d'élaboration du film mixte à l'interface. Les spectroscopi
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14

LEFEVRE, DIDIER. "Caracterisation physico-chimique et structurale d'un polymere bidimensionnel realise par la technique de langmuir-blodgett." Paris 11, 1995. http://www.theses.fr/1995PA112141.

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Ce memoire traite de la caracterisation physico-chimique et structurale d'un polymere bidimensionnel (2d) constitue de macrocycles polymerisables et preorganises dans le plan par la technique de langmuir-blodgett (lb). Les macrocycles sont des porphyrines portant 4 fonctions acetyleniques vraies peripheriques qui, par couplage oxydant, se lient dans les deux directions du plan par formation de liens covalents diacetyleniques. Ces porphyrines, solubles dans l'eau, sont absorbees sous une monocouche d'acide dihexadecylphosphorique, pour constituer le film semi-amphiphile monomere. Le film de lan
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15

Mabuchi, Michiaki. "Nano-Structure and Thermal Relaxation of Ultrathin Polymer Films Prepared by the Langmuir-Blodgett Technique." Kyoto University, 1998. http://hdl.handle.net/2433/182337.

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16

Gustafson, Inga. "Phospholipid membranes in biosensor applications : Stability, activity and kinetics of reconstituted proteins and glycolipids in supported membranes." Doctoral thesis, Umeå : Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-172.

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17

Provence, Michel. "Fonctionnalisation de micro-capteurs par la technique de Langmuir-Blodgett : application à la détection du glucose." Lyon 1, 1999. http://www.theses.fr/1999LYO10301.

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Ce travail de thèse consiste à utiliser une technique d'ingénierie moléculaire, la technique de Langmuir Blodgett, pour la réalisation d'une membrane permettant la fonctionnalisation de micro-capteurs biochimiques usinés collectivement sur substrat silicium selon les techniques de fabrication des MEMS (Micro Electro Mechanical System). L'objectif de cette fonctionnalisation est la détection conductimétrique du glucose en milieu liquide. Le document présente un état de l'art des micro-biocapteurs avant de présenter la technique de Langmuir Blodgett, principale technique expérimentale utilisée a
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18

Dechezelles, Jean-François. "Propriétés d'émission de luminophores incorporés au sein de cristaux photoniques colloïdaux d'architecture contrôlée." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13960/document.

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Au cours de ce travail, nous nous sommes intéressés à l’élaboration de cristaux photoniques colloïdaux d’architecture contrôlée afin d’étudier leur effet sur les spectres de photoluminescence de luminophores. Notre stratégie a été d’incorporer les émetteurs au sein des particules de silice composant les cristaux colloïdaux de façon à les répartir de manière homogène dans l’ensemble des matériaux. Nous présentons la synthèse des précurseurs minéraux et l’élaboration de cristaux colloïdaux d’épaisseur contrôlée à la couche près grâce à la technique de Langmuir-Blodgett. Ces structures sont carac
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19

Lamarre, Samuel. "Organisation en deux dimensions de nanoparticules métalliques et de copolymères à blocs à l’aide de la technique Langmuir-Blodgett." Doctoral thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25489.

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Ce projet de thèse explore les paramètres régissant l’incorporation de nanoparticules métalliques à l’intérieur d’une couche ultramince de copolymère à bloc. Les composites sont mis en forme à l’interface air/eau à l’aide d’une cuve de Langmuir, puis transférés sur substrat solide à l’aide de la technique de Langmuir-Blodgett. Cette méthode permet d’obtenir une couche pseudo-monomoléculaire nano-structurée. Le comportement du copolymère seul à l’interface air-eau est d’abord étudié en fonction de différents paramètres tels que la température de la sous-phase, la masse molaire du copolymère, la
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20

Jergel, M., P. Šiffalovič, K. Végsö, et al. "Grazing-incidence Small-angle X-ray Scattering Technique for Probing Nanostructures and Processes at Nanoscale." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/42696.

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The paper presents the grazing-incidence small-angle X-ray scattering technique and its application to the studies of self-assembly and re-assembly effects of colloidal nanoparticles. Two basic cases are exemplified - solvent evaporation driven self-assembly and self-assembly driven by barrier movement in the Langmuir-Blodgett trough. Studies of the nanoparticle re-assembly effects due to the surfactant removal complete the overview. These examples document strength of GISAXS for an in situ tracking of processes at nanoscale. The results have direct implications for tailored preparation of th
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Massé, Pascal. "Cristaux photoniques colloïdaux d'architecture contrôlée." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2007. http://tel.archives-ouvertes.fr/tel-00265897.

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Ce manuscrit décrit l'élaboration de cristaux photoniques d'architecture contrôlée par l'assemblage de particules colloïdales. Nous avons présenté tout d'abord les voies de synthèse des particules colloïdales monodisperses minérales et organiques ainsi que les méthodes d'élaboration de cristaux photoniques colloïdaux d'épaisseur homogène. La qualité cristalline des édifices a été caractérisée par microscopie électronique à balayage et leurs propriétés optiques enregistrées par spectroscopie proche infrarouge. Dans le but de moduler l'architecture des matériaux, nous avons aussi fabriqué des hé
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22

Altalebi, Hasanain Basim. "Processing of Ultra-Thin Film of Un Modified C60 Fullerene Using the Langmuir-Blodgett Technique. Effect of Structure on Stiffness and Optoelectric Properties." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1506520625022502.

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23

Dechézelles, Jean-François. "Propriétés d'émission de luminophores incorporés au sein de cristaux photoniques colloïdaux d'architecture contrôlée." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00555684.

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Au cours de ce travail, nous nous sommes intéressés à l'élaboration de cristaux photoniques colloïdaux d'architecture contrôlée afin d'étudier leur effet sur les spectres de photoluminescence de luminophores. Notre stratégie a été d'incorporer les émetteurs au sein des particules de silice composant les cristaux colloïdaux de façon à les répartir de manière homogène dans l'ensemble des matériaux. Nous présentons la synthèse des précurseurs minéraux et l'élaboration de cristaux colloïdaux d'épaisseur contrôlée à la couche près grâce à la technique de Langmuir-Blodgett. Ces structures sont carac
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Reculusa, Stéphane. "Synthèse de matériaux d'architecture contrôlée à base de silice colloïdale." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2004. http://tel.archives-ouvertes.fr/tel-00009245.

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Ce manuscrit décrit l'utilisation de particules de silice colloïdale de taille et de fonctionnalité définies pour élaborer des matériaux aux propriétés spécifiques. Dans un premier temps, nous avons comparé différentes méthodes de synthèse de particules de silice à partir d'un précurseur moléculaire selon un procédé sol-gel. Celles-ci nous ont permis de fabriquer des objets sphériques de fonction de surface contrôlée et avec une taille moyenne régulière comprise entre 50 nm et 2 microns. Une fois ces particules synthétisées, nous avons étudié leur comportement à l'interface air-eau grâce à la
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Stephens, Brian Dominic. "BIOCOMPOSITE PROTON EXCHANGE MEMBRANES*." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147968573.

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Choi, Ikjun. "Interfacial assembly of star-shaped polymers for organized ultrathin films." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50246.

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Surface-assisted directed assembly allows ultrasoft and replusive functional polymeric “colloids” to assemble into the organized supramolecular ultrathin films on a monomolecular level. This study aims at achieving a fundamental understanding of molecular morphology and responsive behavior of major classes of branched star-shaped polymers (star amphiphilic block copolymers and star polyelectrolytes) and their aggregation into precisely engineered functional ultrathin nanofilms. Thus, we focus on elucidating the role of molecular architecture, chemical composition, and intra/intermolecular in
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Lai, Hung Chuan, and 賴虹全. "Assembly of Nanoparticles by Langmuir-Blodgett and Self-Assembly Techniques." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/22658861779056504243.

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Tsai, Hui-Jung, and 蔡惠榕. "Fabrication of Nanoparticulate Monolayers by using Langmuir-Blodgett and Self-Assembly Techniques for Superhydrophobic Surface." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/40495496481385559821.

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博士<br>國立成功大學<br>化學工程學系碩博士班<br>97<br>Nanoparticulate monolayers were prepared by using Langmuir-Blodgett and self-assembly techniques and used for superhydrophobic surface application. Langmuir monolayers of octadecylamine (ODA), octadecylthiol (ODT), and mixed ODA/ODT at air/liquid interface were used as template layers to adsorb gold nanoparticles (AuNPs) dispersed in the subphase. Furthermore, the adsorption of AuNPs was also enhanced by the destabilization effect of ethanol introduced into the colloidal solution. The monolayer not only acts as a template layer to incorporate AuNPs but also
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Wu, Chii-Wai, and 吳啟偉. "Two-Dimensional Nanostructure Fabrication by Langmuir-Blodgett Technique." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/34630809638247326891.

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碩士<br>中原大學<br>應用物理研究所<br>94<br>In this thesis, we introduce the principle and application of the Langmuir-Blodgett technique. By this method, we fabricate the ordered Polystyrene 2D structure, and discuss the relation between the surface pressure and the area of the LB-film in the process of forming the 2D structure. The surface pressure increases as compressing the bipolar molecules on the air/water interface continuously. As the separation distance between molecules decreasing, the surface pressure goes through two phase transitions (2D-gas to 2D-liquid and 2D-liquid to 2D-solid). If PS micr
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Rajdev, Priya. "Orienting Macromolecule At The Air - Water Interface : DNA-Protein Interaction On Langmuir Films." Thesis, 2008. https://etd.iisc.ac.in/handle/2005/781.

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The Langmuir – Blodgett (LB) technique is about forming insoluble monolayer on the surface of aqueous solution and recently, it has emerged as one of the best method to study floating monolayer at the air – water interface. It has gained popularity after the use of monolayer with chemical complexes as well as biological species, and recently it has been used for the formation of biosensors. Langmuir monolayer arrays the amphiphilic molecules in a fashion where the hydrophobic part points towards the air and the hydrophilic group remains in contact with the aqueous subphase. Due to this propert
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Rajdev, Priya. "Orienting Macromolecule At The Air - Water Interface : DNA-Protein Interaction On Langmuir Films." Thesis, 2008. http://hdl.handle.net/2005/781.

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The Langmuir – Blodgett (LB) technique is about forming insoluble monolayer on the surface of aqueous solution and recently, it has emerged as one of the best method to study floating monolayer at the air – water interface. It has gained popularity after the use of monolayer with chemical complexes as well as biological species, and recently it has been used for the formation of biosensors. Langmuir monolayer arrays the amphiphilic molecules in a fashion where the hydrophobic part points towards the air and the hydrophilic group remains in contact with the aqueous subphase. Due to this propert
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Liu, Zheng-jia, and 劉政佳. "Constant-Pressure Self-Assembly Langmuir-Blodgett Technique in Dense Nanoparticles Film Formation." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/14865523892423140123.

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碩士<br>國立中正大學<br>化學所<br>94<br>The main theme of my thesis is of the development of a suitable technique in the preparation of a dense film composed of 0D nanoparticles. We have chosen silver nanoparticles synthesized in hexane, with capping (stabilizing) molecules of oleic acid and the average diameters in 5-6 nm, as a model system in our entire studies. The niche of my approach is to combine both conventional Langmuir-Blodgett (LB) technique and the spontaneous self-assembly of hydrophobic nanoparticles at the water-air interface. The method we have been developed called the Constant-Pressure
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Yang, Jhen-Yu, and 楊振宇. "Preparation of Pd nanoparticles with Pd-imidazole complexes by the Langmuir –Blodgett technique." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/70042798821789131218.

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碩士<br>國立東華大學<br>化學系<br>95<br>[Pd(imC16H33)2Cl2] and [Pd(imC16(2-OH))2Cl2] are both amphiphilic complexes. Molecular ordering of Pd(II)-imidazole complexes upon mechanical compression at the air/water interface is studied by surface pressure-area (π-A) isotherms and Brewster angle microscope (BAM). The repeatability of the isotherms and the stability of the Langmuir films are examined by successive compression–expansion cycles. The monolayers at the air/water interface are transferred onto solid substrate using vertical dipping Langmuir-Blodgett (LB) technique. The LB films are comprised of
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Lin, Yung-Hsuan, and 林勇亘. "A Study of Dye-Sensitized Solar Cell Electrodes Fabricated with Langmuir-Blodgett Technique." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/08445067250727399679.

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碩士<br>中原大學<br>物理研究所<br>98<br>We study the impact of surface roughness of TiO2 thin films on dye-sensitized solar cells and the characteristic of surface of TiO2 thin films. Langmuir-Blodgett (LB) technology was utilized to prepare TiO2 thin film electrodes of the dye-sensitized solar cells.The result clearly demonstrates that the presence of the LB layer significantly improved the contact between the FTO and the main TiO2 layer by particle size of 20nm deposited TiO2 particle. As a result, the conversion efficiency was improved by 47.0% from 1.7% to 2.5% due to the introduction of the interfac
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Ho, Linh-Bao. "Préparation de nanomotifs moléculaires de surface à partir des zwitterionomètres segmentés à base de PTMO par la technique Langmuir-Blodgett /." 2005. http://proquest.umi.com/pqdweb?did=1179952991&sid=2&Fmt=2&clientId=9268&RQT=309&VName=PQD.

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Wu, Yung-Han, and 吳泳翰. "Preparation of gold nanoparticle films by using Langmuir-Blodgett technique and their application for Surface Enhanced Infra-Red Absorption Spectroscopy." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/za848p.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>100<br>The metal nanoparticle film with well arrangement has good applicability in many fields, such like photonics, electronics, biomaterials and sensors. Among all methods for the film preparation, such like vapor deposition, etching and wet chemical method, we use Langmuir-Blodgett technique to prepare the gold nanoparticle film in this research. This method has obvious advantages such like simple process, less time cost, and controllable operating parameters. It can be applied to various nanoparticles with any shape and size, such as spherical, rod, square or
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Olejnik, Piotr. "Enzymy na stałych podłożach i w układach nanostrukturalnych." Doctoral thesis, 2015. https://depotuw.ceon.pl/handle/item/1314.

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Głównym przedsięwzięciem niniejszej rozprawy doktorskiej jest opracowanie metod unieruchamiania enzymów na wybranych podłożach, biorąc szczególnie pod uwagę kontrolowanie orientacji przestrzennej cząsteczek enzymów na powierzchni oraz określenie jej wpływu na aktywność bioelektrokatalityczną, strukturę oraz stabilność biokatalizatorów. Tematyka badawcza skupia się na opracowaniu efektywnych powierzchni katalitycznych, które mają kluczowe znaczenie dla rozwoju technologii biopaliwowych i biosensorów trzeciej generacji. Ponadto praca obejmuje charakterystykę fizykochemiczną układów nanostruktura
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38

(8771429), Ashley S. Dale. "DEVELOPING AN APPROACH TO IMPROVE BETA-PHASE PROPERTIES IN FERROELECTRIC PVDF-HFP THIN FILMS." Thesis, 2020.

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Abstract:
Improved fabrication of poly(vinylindenefluoride)-hexafluoropropylene (PVDF-HFP) thin films is of particular interest due to the high electric coercivity found in the beta-phase structure of the thin film. We show that it is possible to obtain high-quality, beta-phase dominant PVDF-HFP thin films using a direct approach to Langmuir-Blodgett deposition without the use of annealing or additives. To improve sample quality, an automated Langmuir-Blodgett thin film deposition system was developed; a custom dipping trough was fabricated, a sample dipping mechanism was designed and constructed, and t
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