Dissertation > Excellent graduate degree dissertation topics show

Fabrication and Application of PDMS-based Porous Wrinkles

Author: TongYi
Tutor: LuCongHua
School: Tianjin University
Course: Materials Engineering
Keywords: hierarchical wrinkles Poly(dimethylsiloxane（)PDMS） micro-porousstamp wrinkle solidification
CLC:
Type: Master's thesis
Year: 2012
Downloads: 1
Quote: 0
Read: Download Dissertation

Abstract


In recent years, because of it’s tremendously amount of applications inbiosensor, optical, micro-transfer field, hierarchical structures which include wrinklemicro-pattern have attracted more and more interest. Currently, there are some mainmethods to fabricate different hierarchical structures. However, it is still a bigchallenge to develop an easy and fast way to fabricate highly complex hierarchicalstructure.In order to fabricate hierarchical structures which contained wrinkle andmicro-holes, we combined wet chemical etching and mechanical pre-stretch exposuremethod. That is to say we use wet chemical etching to get the micro-holes and usemechanical pre-stretch exposure method to fabricate wrinkle pattern. We couldcontrol the hierarchical structures by adjusting the order of two steps and the way ofmechanical pre-stretch exposure. During the preparation, we investigated severalfactors which include the treatment duration with O2plasma and UVO, etching timewith HF, stretching ratio and etching temperature. These factors have seriously impacton wrinkle formation. We also focused on the solidification of the wrinkle pattern bythe second exposure treatment.In addition, we use porous PDMS wrinkles as the stamp for investigation theirapplication in the micro-transfer field. For the sake of controlling the process oftransfer, we systematically investigate the factors including contact time, necessity ofthe substrate treatment, transfer atmosphere and loaded weight, which have an effecton the transferred microstructure. The results show that our PDMS stamp with thehierarchically porous wrinkles has greatly enhanced the ink reserve and transferefficiency.

Related Dissertations

  1. Surface Wrinkles:regioselective Fabrication and Application As Templates,TB30
  2. Poly（dimethylsiloxane） Elastomeric Microspheres: Controllable Synthesis and Surface Winkling,TB383.4
  3. Studies on Key Processes and Techniques of PDMS Microfluidic Chips,TN492
  4. Synthesis, Microstructural and Optical Properties of Pr3+ Doped 12CaO·7Al2O3 Powders,TB383.3
  5. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  6. Study on the Synthesis Bi3.25La0.75Ti3O12（BLT） Nanotubes and Nano Wires,TB383.1
  7. Preparation of ITO Quai-1D Nanostructures by Sol-Gel Method Combined with Porous Anodic Aluminum Oxide Template,TB383.1
  8. Synthesis, Characterization and Properties of One-dimensional Silicon Carbide Nanomaterials,TB383.1
  9. Synthesis and Characterization of Tio2 -based Nanostructures,TB383.1
  10. Preparation and Characterization of Rare-earth Luminescent Material CaWO4: Eu3+,TB383.1
  11. Preparation and Properties of ZAO Target,TB383.1
  12. Preparation and Application of Biocompatible Nanocomposites,TB383.1
  13. Preparation and Research of the PbSe Quautum Dot Doped PMMA Fiber Materials,TB383.1
  14. The Synthesis of Novel Pt Nanomaterials and Their Catalytic Applications,TB383.1
  15. Preparation of PPV/AuNPs Nanocomposite by Two Different In-situ Methods and Study on Their Fluorescence and Photovoltaic Properties,TB383.1
  16. Biosynthesis, Characteristics and Applications of β-glucosidase-silk Fibroin Nanoparticles Conjugates,TB383.1
  17. Preparation of a Hepatic Targeting Galactosylated Chitosan Nanoparticle Loaded Lactosyl-norcantharidin.,TB383.1
  18. Surface Plasmons and Nonlinear Optical Properties in Bimetallic Core-shell Nanoparticles,TB383
  19. Preparation, Characterization, and Application in Polymer Composites of Graphene,TB383.1
  20. Study of a Class of Nano-Containers Based on Cyclodextrin Inclusion Complexation,TB383
  21. Synthesis and Characterization of Low-dimensional Nickel Borate/ Lanthanum Borate Nano Materials,TB383.1

CLC: >
© 2012 www.DissertationTopic.Net  Mobile