IEEE Santa Clara Valley CPMT Society Chapter

"Nanomaterial Synthesis and Integration for Sensor and Energy Applications" Heather C. Chiamori, Berkeley Sensor & Actuator Center (BSAC), UC-Berkeley

WEDNESDAY, May 8, 2013

• Buffet dinner served at 6:00 PM ($20 if reserved by May 6th) ; $10 for fulltime students and currently unemployed engineers
  ($5 more at the door; vegetarian available)

• Presentation (no cost) at 6:45 PM (arrive by 6:35 PM)

  Please register in advance for this event, using our IEEE Council's DoubleKnot registration site.

  You may register yourself, plus others from your company/institution, for both dinner and presentation, or for only the presentation. You may make an on-line payment for the dinner, or arrange to pay at the door.

PLEASE RESERVE IN ADVANCE --
• For dinner and/or meeting: at the Doubleknot link above.
• Even if you're coming only for the presentation, we want you to sign up on our registration web site, so we can quicken the sign-in process and get everyone seated by 6:45 PM.
Biltmore Hotel

• 2151 Laurelwood Rd (Fwy 101 at Montague Expressway), Santa Clara, (408) 346-4620 -- click map at right.

  
  

  OVERVIEW:

      Nanostructures exhibit unique properties such as large surface-to-volume ratios, increased sensitivity at lower input power levels, and higher current carrying capability contributing to increased functionality of nanostructure devices that will be leveraged for next generation sensor and energy applications. Synthesis and integration of nanostructure devices using carbon-, metal- and metal oxide-based nanostructures for sensor and energy applications are studied with the goal of nano-to-micro device integration utilizing well-established micro- and nano-fabrication tools and techniques, including (1) self-assembled, integrated carbon nanotube gas/pressure sensors; (2) titanium dioxide nanostructures for energy applications; and (3) synthesis and processing of silver nanowires and graphene.
      Suspended carbon nanotubes (CNTs) are grown by in-situ heating of microstructures, allowing for the placement of CNTs at specific locations without conventional global furnace heating. These CNT devices can be self-assembled and the integration process fully monitored via electrical signal controls. Electrothermal pressure sensing, with selective gas and pressure sensing applications, has been demonstrated. Furthermore, control and improvement of the self-assembled contact resistances of nano-to-micro interfaces have been investigated by means of local annealing via Joule heating.
      Single-crystalline and rutile phase titanium dioxide nanoswords have been synthesized with features of 40-90 nanometers in thickness, 200-1000 nanometers in width, and up to tens of micrometers in length. They have been grown by means of rapid induction heating and exhibit a large area of exposed crystalline faces that show an enhanced photocatalytic reaction. Scaling up the synthesis method for bulk growth and ease of integration with existing microfabrication techniques has been studied for enhanced solar absorption of the titania nanostructures for possible large-scale water splitting applications under direct sunlight.
      In the third demonstration area of this talk, silver nanowires arrays have been synthesized using oblique-angle deposition (OAD). Based on the angle of metal deposition, the porosity and nanowire morphology can be controlled. These nanostructure substrates have been used as multiple test platforms. Finally, I will discuss some recent work on the nanopatterning of graphene for electrical and optical devices.

  Speaker Biography:
  

      Heather C. Chiamori received her PhD degree in mechanical engineering from the University of California, Berkeley, in December 2012. While working under the guidance of Professor Liwei Lin, she studied the synthesis and integration of nanomaterials for NEMS, sensor, and energy devices. She received both her BS (2004) and MS (2008) degrees in mechanical engineering from UC Berkeley. She has a postdoctoral scholarship appointment at Stanford University in the Department of Aeronautics and Astronautics, studying nanomaterials for harsh environments applications since March 2013.

  
  

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