Chieh ChangElectrospinning fundamentalsSlide 3Slide 4Assembly-aligned nanowiresSlide 6Slide 7Slide 8Solution delivery systemSlide 10Challenges in electrospinningChieh ChangChieh ChangEE 235 – Presentation IIEE 235 – Presentation IIApril 11, April 11, 20072007A review on electrospinning A review on electrospinning design and nanofiber design and nanofiber assembliesassembliesW.E. Teo and S. RamakrishnaW.E. Teo and S. RamakrishnaNational University of Singapore, SingaporeNational University of Singapore, SingaporeElectrospinning Electrospinning fundamentalsfundamentalsElectrospinning Electrospinning fundamentalsfundamentalsMechanical spinningEarly patented in 1934Instead of mechanical forces, using electrical forces to produce polymer fibers with nanometer-scale diametersSpinningSpinningL. Larrondo et al, 1981L. Larrondo et al, 1981T. A. Kowalewski et al, 2003T. A. Kowalewski et al, 20034500 fpsElectrospinning Electrospinning fundamentalsfundamentalsMichigan Technological UniversityMichigan Technological UniversityAssembly-aligned Assembly-aligned nanowiresnanowiresAssembly-aligned Assembly-aligned nanowiresnanowiresAssembly-aligned Assembly-aligned nanowiresnanowiresAssembly-aligned Assembly-aligned nanowiresnanowiresSolution delivery Solution delivery systemsystemSolution delivery Solution delivery systemsystemChallenges in Challenges in electrospinningelectrospinningAlthough there are several set-ups designed to achieve fiber alignment, there is still a serious shortcoming in getting highly aligned nanofibres over a large area of substantial thickness.The only three-dimensional electrospun structure with significant length, width and height is a fibrous tube. With the ability to fabricate three-dimensional structure, other applications such as bone replacement scaffold can be considered.Arrayed nanofibre assemblies created thus far are based on arranging aligned nanofibres with very little control on the distance between each
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