Deposited silicon
This presentation is the property of its rightful owner.
Sponsored Links
1 / 2

NIRT: Nanohybrids and Nanobiohybrids PowerPoint PPT Presentation


  • 56 Views
  • Uploaded on
  • Presentation posted in: General

deposited silicon. bare silicon. calcined template. laser processing. HF treatment. NIRT: Nanohybrids and Nanobiohybrids. Ulrich Wiesner, Cornell University, DMR-0405195.

Download Presentation

NIRT: Nanohybrids and Nanobiohybrids

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Nirt nanohybrids and nanobiohybrids

deposited silicon

bare silicon

calcined template

laser processing

HF treatment

NIRT: Nanohybrids and Nanobiohybrids

Ulrich Wiesner, Cornell University, DMR-0405195

A Nanoscale Interdisciplinary Research Team (NIRT) has come together to develop a “bottom-up” approach based on block copolymer directed thin film assembly of silica nanostructures on silicon and subsequent laser induced melting to generate silicon surface arrays with spacings down to the molecular level (~10 nm). The aim is to understand the dynamics governing creation of these structures, as well as to invent enabling technologies that will allow inexpensive fabrication of large areas of such nanostructures without the use of traditional photolithography. After initial in depth studies of the nanostructured, porous silica template formation, in recent efforts the team has worked on high aspect ratio pillar formation through the laser induced melting and pore filling process. Through deposition of an amorphous silicon layer on top of the template prior to the laser treatment, aspect ratios were increased from ~0.1 to ~1.0, see figure.

Nanopillar formation through laser induced melting and pore filling of a honeycomb silica surface template, see schematic. AFM images comparing results of samples without (A) and with a surface layer of deposited amorphous silicon.


Nirt nanohybrids and nanobiohybrids

NIRT: Nanohybrids and Nanobiohybrids

Ulrich Wiesner, Cornell University, DMR-0405195

Education:

Five PI’s (David A Muller, A&EP; Sol M. Gruner, Physics; Barbara A. Baird, Chem.; Michael O. Thompson, MS&E; and U. Wiesner, MS&E) and one collaborator (Christopher K. Ober, MS&E) at Cornell have been co-advising four graduate students (Hitesh Arora, Phong Du, Jerome Hyun, Prabuddha Sengupta), and two undergraduate students (Billy Yau and Brian Goodfellow) so far in the research supported by this grant.

serves predominantly minority and low-income populations. Students from the Youth Bureau were brought to the Cornell campus to see the lab facilities and perform hands-on activities. Activities included crosslinking polymers and creating nylon.

Outreach

Wiesner research group graduate students Andrew Burns and Erik Herz led chemistry activities for students from the Ithaca Youth Bureau, a local organization that provides after-school and summer enrichment programs for area students and

Graduate student Andrew Burns oversees a student who is performing experiments with polymers.


  • Login