Gary Aden

• Ph.D. Chemistry
• Managing Director at Applied NanoStructures

A new measurement technique using a cantilever probe with an integrated thermal sensor is investigated for measuring thermal conductivity at the nanometer scale. The probe is used in a configuration wherein the laser from an atomic force microscope (AFM) heats the tip of the probe above ambient temperature. Heat is transferred from the probe to a s...

I read with disappointment Eric Betzig's letter in the June issue (p24). It is hard to imagine how so many odd comments and conclusions could be drawn from the article "Fine tips engineer atomic and molecular opportunities" (March p67), and I would like to clarify a few points.

X-ray Microfluorescence (XRMF) analysis uses a finely collimated beam of X-rays to excite fluorescent radiation in a sample (Nichols & Ryon 1986). Characteristic fluorescent radiation emanating from the small interaction volume element is acquired using an energy dispersive detector placed in close proximity to the sample. The signal from the detec...

Preliminary hydrothermal experiments were completed at 300/sup 0/C, 300 bars and 200/sup 0/C, 300 bars in the basalt/groundwater system to determine the chemical stability of crushed basalt. Analysis of solution data from the 300/sup 0/C experiments as a function of time and reaction products indicated that the primary reaction was the alteration o...

Initial characterization of the geologic and engineered barrier materials for a nuclear waste repository in basalt has been completed. Data have been obtained on the characteristics of the reference waste forms which are being studied for eventual disposal in such a repository. Reference basalt entablature, colonnade, and flow top specimens have be...

The Basalt Waste Isolation Project (BWIP) is developing a multiple-barrier waste package to contain high-level nuclear waste as part of an overall system (e.g., waste package, repository sealing system, and host rock) designed to isolate the waste in a repository located in basalt beneath the Hanford Site, Richland, Washington. The three basic comp...

A description is given of a new particle-analysis procedure capable of background subtraction over the entire spectrum and of fitting the x-ray peaks for a 15-element sample in under 2 min. It consists of TWIST, a relatively simple, fast, and yet accurate routine for background subraction, and QKFIT, a linear least-squares fitting routine that uses...

Thesis (Ph. D.)--Arizona State University, 1981. Vita. Includes bibliographical references (leaves 282-290).