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Structured Polymers and Oblique Angle Polymerization** |
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The growth of spatially organized structures is of considerable fundamental interest, since it may provide us with important clues to the way in which organized structures form in Nature. A closer look at complex structures in insect wings and lizard toes reveal organized structured features at the microscopic scale. The organized structures in Nature are formed through evolutionary processes, and these complex molecules and features are built using molecular protein machinery. Synthetic
polymers, that mimic biological materials in their designs, form
organized structures too. We have demonstrated, for the first time,
that structured polymer brushes can be fabricated by an oblique angle
polymerization method. These structures are composed of approximately
40,000,000 aligned columns (approximately 100-150 nm in diameter) per
square millimeter similar to the gecko footpad or insect wing.These
structures have high aspect ratio (~1000:1) and the production
technique does not require any template, lithography method or a
surfactant for deposition (Figure 1). The structured polymer brushes
are conformal to any surface and suitable for industrial applications.
This approach allows us to tune the chemical properties of
nanostructured surfaces and film morphology to control the
physicochemical properties of the resulting films, such as
hydrophobicity, porosity, electrochemistry, chemical reactivity,
surface energy and crystallinity.Here is a simulation of the oblique
angle polymerization (Ballistic Monte Carlo Simulation)MOVIE Advances
in Advances (Wiley Publishing)
Recent Invited
talks... European
Coatings Conference
"Polymeric Nanostructures", November 27-28, Berlin, Germany,
2008 214th
Meeting
of The Electrochemical Society, BD
(Becton and Dickinson and Company), NC, August
14th, 2008 Boeing
Distinguished Researcher And Scholar Seminar, Huntington Beach, CA,
July 24th,
2008 NSTI,
Nanotech, Biosensor and Diagnostic Session, 2008 University
of Akron, Seminar, 2008 American
Chemical Society (ACS) 235th meeting, Polymer Chemistry, 2008 McGowan Institute, University of Pittsburgh, 2008 Arizona State University, Physics Seminars Series, 2007 Oklahoma
State University, Physics Seminars and Colloquia, 2007 **If you want to learn more about structured
polymers, click to the
PDF's below or contact us.
Figure 1. Structured Poly-(p-xylyene) film and its applications
References : (Please note that the PDF files provided in this web site are copyrighted documents) Cetinkaya,
M., Malvakdar, N., Demirel,
M.C.,
“Power-Law Scaling of Structured Poly(p-xylylene) Films
Deposited
by Oblique Angle”, JOURNAL OF POLYMER SCIENCE PART B: POLYMER
PHYSICS, Vol. 46, pg 640-648, 2008. (PDF) Demirel, M.C., “Emergent Properties of Spatially Organized Poly(P-xylylene) Films Fabricated by Vapor Deposition" COLLOIDS and SURFACES-A, Vol.321, pg. 121-124, 2008 (PDF) Cetinkaya, M., Boduroglu, S., Demirel, M.C. “Growth of Nanostructured Thin Films of Poly(p-xylylene) Derivatives by Vapor Deposition”, POLYMER, Vol.48, pg. 4130-4134, 2007 (PDF)
Demirel, M.C., So, E., Ritty, T.M, Naidu, S,
Lakhtakia, A., "Fibroblast Cell Attachment and Growth on Nanoengineered
Sculptured Thin Films", JOURNAL OF BIOMEDICAL MATERIALS
RESEARCH-B, Vol
81B, pg. 219-223, 2007 (PDF) Demirel,
M.C.,
Boduroglu S., Cetinkaya, M., Lakhtakia, A. “Spatially Organized
Free-Standing Poly(P-xylylene) Nanowires Fabricated by Vapor Deposition”,
LANGMUIR, Vol. 23, pg. 5861-5863, 2007(PDF) Mangan,
A., Boduroglu, S., Wang, H., Demirel
M.C., “Bio-Functionalization of Structured
Poly(P-xylylene) Films”, submitted, 2008.
(PDF)
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