Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
Master ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold NAdvisor: Professor YOENGKWAN LEEThe Graduate School of Sungkyunkwan I niversity Department of Chemical EngineeringJune 2006, S'uu-OH, KoreaCHAPTER 1. INTRODUCTIONElect]Ollie package teclmology has many applications ill the electronics industry. and is particularly useful in die computer. informatio Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold n tedmology. mobile communications, and high technology electronic appliance industries [1-3]. In particular, flip chip technology has numerous applicFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
ations in the smart cards, liquid crystal displays, and communication system industries [4-5]. Flip clup tedmology was developed based on anisotropic Master ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold ls such as Ni. Au polymer. Ag. and insulating resins [6-7], In this context, conducting polymers winch have greater reliability' lower resistance and higher adhesives strength, guarantee a better flip interconnection on an organic substrate. For tills purpose, seveial routes for die fabrication of g Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold old shells on polystyrene (PS) cores have been investigated [8-9]. Khan et al. [10] examined the morphology' of metallic gold overlayers deposited ontFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
o conducting polymer-coated PS using an electroless deposition method Their results showed that the gold nanoparticles weie randomly dispeised over thMaster ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold catalyst. Davidov et al. [1] combined self-assembly and surface seeding methods using polyelectrolytes as adhesive glue between the PS core and gold nanopaiticles. They produced clusters of Au nanoparticles on a PS surface instead of a continuous gold shell Gao et al. [11] and Ming et al. [12] group Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold s previously developed continuous metallic nanoshells on PS particles using a layer-by-layer deposition-1 -technique with 4-aminothiophenol as the binFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
der, and a solvent-assisted route, respectively. However, very rough gold shells were obtained in both cases.In most cases, it is very difficult to tuMaster ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold e investigated two novel methods to fabricate core-shell structures of both modilied-polydivinyllx.'ii/enc.'gold (mixlilicd-PDVB All) and carboxylic liinclional polystyrene. gold (PS-COOH Au).Part A:A novel (modified-PDVB)'Au core-shell structure was investigated by reducing a gold-phenanthroline co Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold mplex to produce Au uauoparticles followed by gentle growth of gold layer using the HAuCUNH;OH system. The PDVB cotes (2-4 ) were synthesized by preciFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
pitation polymeiization to yield a fully crosslinked structure [13-20], Tile SIU face of the cores was then modified by introducing thiol and sulfonicMaster ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold rophilicity to hydrophobic cores and anchoring the gold nanoparticles. The ivsillting gold nanopaitides served as gold seeds for shell growth which was obtained using a mixed solution of HAuCh and NH OH to obtain completely uniform gold shells.lhe three advantages of this deposition method are as fo Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold llows: 1) (-S0;H and SHb modilicd PDXTỈ cores are more eil’eelive ill dcỊxrsitmg gold than the polyeleclrolyte-employed PS cores. In particular. PDVB-Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
SChH cores were successfully produced with high -SO;.TT concentration bill a perfect corc-sliMỊKí was slill maintained This overcomes-2-the moqjhologiMaster ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold rosslinked polymer with good physical and chemical properties, as well as high theimal resistance. They can withstand pressure and heat, wliich makes these particles suitable for creating the necessary electrical contact. Tins electrical contact needs to be between the two bond pads of the cilip and Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold the substrate in the anisotropic conductive adhesive [21]. 3) The method IS facile, versatile, and suitable for the coating other metals whose compleFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
x O1 cations can be reduced in solution.Part B:We investigated a novel (PS-COOH) Au core-shell structure prepaied by impregnating an aqueous gold nanoMaster ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold oparticles. The resulting gold nanoparticles served as gold seeds for the gentle shell growth which was obtained by employing a mixed solution of AufOHfe and NH.OH to obtain completely unifam and smooth gold shells.-3-CHAPTER 2. THEORETICAL BACKGROUND2-1. Core-shell structureTo make gold nanoshells, Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold manufactured gold nanoparticles are attached to the functionalized surface of a somewhat larger sphere of a core such as S10' or polystyrene, and theFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
n grown by further reduction or by layer-by-layer attachment of metallic particles (fig. 2.1). Functionalizing on tire core surface IS performed With Master ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold s [24]OOỠFigure 2.1 Randomly generated gold-on-core with rnonodisperse gold particles. shown from left to right growth of gold nanoshell by further reduction-4-2-2. Application of conductive core-shell particlesThe research relates to a method of preparing the anisotropic conductive film (ACF) for i Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold nterconnection of flip chips onto plastic substrates [21 ].Anisotropic conductive adhesive excels from isotropic conductive sticking and soldering U1Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
that It is only conductive in the Z-axis (vertical direction). whereas the aforementioned procedures conduct electrical current in all directions [25-Master ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHAN Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold . 2.2).The anisotropic conductive adhesive is filled With conductive particles having the same dimensions, and With a content tliat is so selected that the particles aie not coming in contact with each other or only insignificant!}'. With adequate pressure the particles cieate electrical contact bet Fabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold ween die bondpad of the chip and die bondpad of the the subtrate Through the input of heat the adhesive becomes hard, which leads to an intact mechaniFabrication of core shell structures of modified poly (divinuylbenzene) gold and of carboxylic functional polystyrene gold
cal and electrical connection (27-28).-5-Master ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHANMaster ThesisFabrication of Core/shell Structures of Modified Poly(divinylbenzene)/Gold and of CarboxylicFunctional Polvstyrene/GoldBy KIM X11YEN PHANGọi ngay
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