Conveners
GC. Condensed Matter Physics / Nanophysics I
- Hans Robinson (Virginia Tech)
R. Shyam
(Clemson University)
10/21/11, 8:30 AM
Contributed
We have fabricated metal-oxide-semiconductor (MOS) devices for a study of implantation rates and damage resulting from low energy ion-solid impacts. Specifically, we seek to capture ion irradiation effects on the oxides. Fabrication of the MOS devices follows a standard procedure where Ohmic contacts are first created on the wafer backside followed by the thermal growth of various thicknesses...
O. Gafarov
(University of South Alabama)
10/21/11, 8:42 AM
Contributed
Results of measurements on two very clean, single-crystal samples of the A15 superconductor V_3 Si are presented. Magnetization and transport data have confirmed the "clean" quality of both samples, as manifested by: (i) high residual electrical resistivity ratio, (ii) very low critical current densities Jc, and (iii) a "peak" effect in the field dependence of critical current. The (H,T) phase...
Daniel Field
(Clemson University)
10/21/11, 8:54 AM
Contributed
We discuss the use of silicon double-paddle oscillators (DPOs) as a technique for following atomistic changes in mechanical properties under energetic ion irradiation conditions in ultra high vacuum (UHV). For these DPOs, it is well known that at low temperatures (~ 4k) the internal friction or Q^{-1} of the anti-symmetric oscillator eigenmode is lower than 10^{-8} and that it increases to...
Albert Gapud
(University of South Alabama)
10/21/11, 9:06 AM
Contributed
Cs_4 [Pt (C N)_4](C F_3 S O_3)_2 (TCP) is the newest palatinate, quasi-one-dimensional conductors with parallel "chains" of Pt maintained by peripheral materials and with well known properties, especially in the potassium-containing material, KCP. Unlike KCP, however, we are finding properties unique to TCP. First, we discuss technical difficulties in measuring the DC resistivity of this...
R. I. Leatherbury
(University of South Alabama)
10/21/11, 9:18 AM
Contributed
Cs_4 [Pt (C N)_4](C F_3 S O_3)_2 (TCP) is a new Krogmann's salt, consisting of quasi-one-dimensional conducting chains of Pt with well known properties, especially in the potassium-containing material, KCP. Unlike KCP, however, there are properties unique to TCP, e.g., longer Pt-Pt separation, insulating at room temperature, and non-magnetic. Previous NMR studies on KCP have mainly been on...
Hassan Masoud
(Georgia Institute of Technology)
10/21/11, 9:30 AM
Contributed
We introduce a mesoscale computational model for responsive gels, i.e. chemically cross-linked polymer networks immersed in Newtonian fluids, and use it to probe the release of nanoparticles from hollow microgel capsules that swell and deswell in response to external stimuli. Our model explicitly describes the transport of nanoparticles in swelling/deswelling polymer networks with complex...
Mrs
Maryam Raftari
(University of Sheffield)
10/21/11, 9:42 AM
Contributed
We have studied the frictional behaviour of grafted poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) films using friction force microscopy (FFM). The films were prepared on native oxide-terminated silicon substrates using the technique of atom transfer radical polymerization (ATRP). We show that single asperity contact mechanics (Johnson-Kendall-Roberts(JKR) and...
Harry Hicock
(James Madison University)
10/21/11, 9:54 AM
Contributed
Foam is a complex fluid whose relaxation properties are associated with the continuous diffusion of gas from small to large bubbles driven by differences in Laplace pressures. We study the dynamics of bubble rearrangements by tracking droplets of a clear, buoyantly neutral emulsion that coarsens like a foam. The droplets are imaged in three dimensions using confocal microscopy. Analysis of the...
Stefan Stoianov
(Virginia Tech)
10/21/11, 10:06 AM
Contributed
Full integration of top-down and bottom-up nanofabrication technologies will require the ability to accurately place nanostructures onto well-defined locations on a surface, where the nanostructures initially only exist suspended in a liquid. As the nanostructures may be quite fragile, perhaps the best way to do this is to pattern the adhesiveness of the surface in order to guide assemblies to...
