Andrew J Stollenwerk

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We use a scanning tunneling microscope to probe single-electron charging phenomena in individual CdSe/ ZnS ͑core/shell͒ quantum dots ͑QDs͒ at room temperature. The QDs are deposited on top of a bare Au thin film and form a double-barrier tunnel junction ͑DBTJ͒ between the tip, QD, and substrate. Analysis of room-temperature hysteresis in the current-voltage(More)
Despite an enormous amount of research on carbon based nanostructures, relatively little is known about the electronic structure of multi-walled carbon fullerenes, also known as carbon onions. In part, this is due to the very high computational expense involved in estimating electronic structure of large molecules. At the same time, experimentally, the(More)
The ability to form patterned surface nanostructures has revolutionized the miniaturization of electronics and led to the discovery of emergent behaviors unseen in macroscopic systems. However, the creation of such nanostructures typically requires multiple processing steps, a high level of technical expertise, and highly sophisticated equipment. In this(More)
BACKGROUND The parent questionnaire ELFRA-2 is considered a valid tool for early detection of delayed language development in 2-year-old children. Applicability for children treated with cochlear implants (CI) is to be investigated. METHODS By means of the ELFRA-2 we documented longitudinally for up to 24 months post implantation language development in(More)
We present the results of extensive Monte Carlo simulations of intercalated manganese-titanium (Mn-Ti) layered TiS2 crystals. The computational model involves mixtures of Mn and Ti in various percentages placed on a triangular lattice with fixed lattice sites and up to five layers. The range of concentrations of intercalated Mn studied was 5%  ⩽  X Mn  ⩽ (More)
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