Argonne National Laboratory

Seminar Series

Date Title

March 1, 2017

10:00 am

Bldg. 440, A105-106

"An Introduction to JST Manufacturing and its Exhausted Workstations", John Greener, JST Manufacturing

 

Since its founding in 1982, JST’s mission has been to design and build efficient-and-cost-effective cleaning and processing products for cleanroom applications and to support these products with superior customer service. JST is a full service design and manufacturing company. Capabilities consist of Process Development and Applications Testing, Engineering Design and Drafting, Manufacturing and Final Test. Our product lines include Wet Processing Equipment, Precision Cleaning, and Cleanroom Accessories and Support Equipment. This presentation will provide an introduction to JST Manufacturing and describe our series of Exhausted Workstations and their applications.

February 15, 2017

11:00 am

Bldg. 440, A105-106

"Probing Charge Dynamics in Nano-materials with Nano-tools: Quasi-One Dimensional Percolation Paths in Quantum Dot Solids", Tamar Mentzel, Massachusetts Institute of Technology
 
 

By manipulating matter at the nanoscale, we can make new materials (nano-materials) tailored to have desired—and even unconventional--properties, and new measurement tools (nano-tools) with higher sensitivity and precision than any macroscopic tool.  In the first portion of my talk, I will discuss one of the simplest examples of a nanomaterial, a lattice of nanocrystals.  One challenge in creating nanocrystal solids with desirable properties is to assemble the nanocrystals with sufficient order. For example, until recently, the electronic properties of nanocrystals were dominated by disorder, and their assembly was not controlled adequately for them to be components of nanoscale circuits.  I will discuss a novel technique, based on e-beam lithography, for assembling nanocrystal solids with sufficient precision and order to be integrated into nanoscale electronic devices as well as to measure for the first time their intrinsic electronic properties.   We find that the charges are carried in quasi-one-dimensional percolation paths, and that the time dynamics of an individual transport channel is described by Levy statistics.  This is an essential step toward realizing and exploiting their predicted unconventional charge and spin transport properties, which are key for application in quantum computing and spintronics or for exploring many-body physics.  In the second portion of my talk, I will present a novel nano-tool for measuring charge in nanoscale structures.  Measuring electrical properties of nanoscale devices is often complicated by the small contact area between the device and the measurement electrodes: The contacts can be unstable or add series resistance.  Our nanoscale charge sensor eliminates contact effects.  The nanoscale sensor enables a highly sensitive measurement that can detect the motion of a single charge.  In turn, that makes it possible to measure electrical conductances as small as 10^-20 Siemens by applying only one volt bias. This is approximately six orders of magnitude more precise than state-of-the-art current-based measurements permit.

 

February 15, 2017

3:00 pm

Bldg. 440, A105-106

“Integrated Imaging of Nanofluidic Devices for Energy Storage and Conversion", Yimin Wu, Argonne National Laboratory, Center for Nanoscale Materials, Electron and X-ray Microscopy Group.