Wrinkled hard skins on polymers created by focused ion beam.

نویسندگان

  • Myoung-Woon Moon
  • Sang Hoon Lee
  • Jeong-Yun Sun
  • Kyu Hwan Oh
  • Ashkan Vaziri
  • John W Hutchinson
چکیده

A stiff skin forms on surface areas of a flat polydimethylsiloxane (PDMS) upon exposure to focused ion beam (FIB) leading to ordered surface wrinkles. By controlling the FIB fluence and area of exposure of the PDMS, one can create a variety of patterns in the wavelengths in the micrometer to submicrometer range, from simple one-dimensional wrinkles to peculiar and complex hierarchical nested wrinkles. Examination of the chemical composition of the exposed PDMS reveals that the stiff skin resembles amorphous silica. Moreover, upon formation, the stiff skin tends to expand in the direction perpendicular to the direction of ion beam irradiation. The consequent mismatch strain between the stiff skin and the PDMS substrate buckles the skin, forming the wrinkle patterns. The induced strains in the stiff skin are estimated by measuring the surface length in the buckled state. Estimates of the thickness and stiffness of the stiffened surface layer are estimated by using the theory for buckled films on compliant substrates. The method provides an effective and inexpensive technique to create wrinkled hard skin patterns on surfaces of polymers for various applications.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Controlled formation of nanoscale wrinkling patterns on polymers using focused ion beam

It has previously been shown that focused ion beam irradiation induces a wrinkled skin on the surface of polydimethylsiloxane. Here, it is demonstrated that the wavelength of the induced wrinkles and their morphology can be effectively selected by controlling the acceleration voltage and fluence of the ion beam. The capabilities of the technique are also extended by adopting the maskless patter...

متن کامل

Nanoscale ripples on polymers created by a focused ion beam.

We show that focused ion beam irradiation results in the creation of peculiar one- and two-dimensional nanoscale features on the surface of polyimide-a common polymer in electronics, large scale structures, and the automobile industry, as well as in biomedical applications. The role of ion beam incident angle, acceleration voltage, and fluence on the morphology of the structural features is sys...

متن کامل

Sculpting on polymers using focused ion beam

Available online 13 June 2008 It has been recently shown t

متن کامل

The Use of Focused Electron and Ion Beams for the Functionalization and Nanostructuring of Polymer Surfaces

Polymers are nowadays actively used in numerous applications owing their low cost and optimized structural properties. Besides, the miniaturization of the novel materials down to nano and even atomic scale needs the use of Electron Microscopy techniques both for imaging and structuring abilities. When used for surface modification, electrons and ions allow altering the surface properties toward...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 104 4  شماره 

صفحات  -

تاریخ انتشار 2007