Nanoscale 3D contour map of protein assembly within the astrocyte porosome complex

From paper "Observation of the smallest metal nanotube with a square cross-section" MJ Lagos, F. Sat...

EE 290F Synchrotron Radiation for Materials Science Applications (Sp 07) Lecture 24 - Nanoscale Magn...

EE 290F Synchrotron Radiation for Materials Science Applications (Sp 07) Lecture 27 - Coherent Soft ...

Engineering researchers such as Babak Parviz are studying nature on the nanoscale to create the next...

Featured Videos in March - "Biomedical Research - The Daunert Group," "Campus Security, Emergency Re...

Featured Videos in March - "Biomedical Research - The Daunert Group," "Campus Security, Emergency Re...

proteins work. How does a nanoscale protein convert energy from ATP hydrolysis into unidirectional m...

proteins work. How does a nanoscale protein convert energy from ATP hydrolysis into unidirectional m...

In 2007, Paul Rothemund gave TED a short summary of his specialty, DNA folding. Now he lays out in c...

The Center for Nanoscale Materials is one of five Nanoscale ...

Discrete Nanoscale Transport refers to a class of transport ...

Nanoscale iron particles are sub-micrometer particles of iro...

[1 - Example of a procedure using ammonium fluoride as an et...

The Center for Probing the Nanoscale (CPN) at Stanford Unive...

A simple and versatile approach to constructing patterns on a solid surface using nanoscale objects is demonstrated. The approach is essentially an inlaying process, in which recess patterns fabricated on a surface are selectively filled with nanoscale objects. The objects are anchored firmly on the surface due to the spatial confinement provided by the recess structures. Protein molecules and inorganic nanoparticles are used in this demonstration. Cyclic voltammetry is used to detect electron transfer signals from patterns of protein molecules...

One critical parameter influencing the structural nature of the phase transitions in magnetocaloric materials Gd5(SixGe(1-x))4 is the Si/Ge ratio (x/1-x), because transition temperatures and structures depend crucially on this value. In this study, single-crystal X-ray diffraction indicates that Si and Ge atoms are neither completely ordered nor randomly mixed among the three crystallographic sites for these elements in these structures. Ge atoms enrich the T sites linking the characteristic slabs in these structures, while Si atoms enrich the ...

On the basis of spectral-expansion Green's function theory, we theoretically describe the topography, polarization, and spatial-coherence properties of the second-harmonic (SH) local fields at rough metal surfaces. The spatial distributions of the fundamental frequency and SH local fields are very different, with highly enhanced hot spots of the SH. The spatial correlation functions of the amplitude, phase, and direction of the SH polarization all show spatial decay on the nanoscale in the wide range of the metal fill factors. This implies that...

Abstract In this article, the authors present theoretical background and practical procedures for linking displacement sensing and estimation to nanoscale alignment. The authors discuss the application of nanoscale displacement sensing and estimation (nDSE)-based overlay metrology tool. The authors propose a new look at what constitutes displacement and alignment. From there, the authors develop several frameworks to bridge these two concepts based on a set of new pseudodisplacement concepts and on the careful selection of references. Direct d...

Abstract In this article, the authors present theoretical background and practical procedures for linking displacement sensing and estimation to nanoscale alignment. The authors discuss the application of nanoscale displacement sensing and estimation (nDSE)-based overlay metrology tool. The authors propose a new look at what constitutes displacement and alignment. From there, the authors develop several frameworks to bridge these two concepts based on a set of new pseudodisplacement concepts and on the careful selection of references. Direct d...

The semiconductor industry is exploring various device and manufacturing techniques to continue scaling transistor sizes beyond the capabilities of CMOS. This scaling is desirable, as it helps reduce device power consumption and area, while allowing higher operating speeds. However, the scaled transistors are increasingly susceptible to manufacturing defects. Architectures that are built using these transistors will need to tolerate defect rates that are orders of magnitude higher than those found in current CMOS technologies. We previously dem...

Abstract Nanoscale Ge/nanoscale SiO2 superlattices (SLs) with four periods have been grown using the two-electron-beam alternation evaporating technique. Visible electroluminescence (EL) from the semitransparent Au film/(nanoscale Ge/nanoscale SiO2) SL/p-Si structures was observed when the forward bias exceeded 5 V, and their EL power efficiencies were significantly higher than that of a semitransparent Au film/nanoscale Ge particles embedded SiO2 film/p-Si structure. The effects of thicknesses of nanoscale Ge layers in the SLs and of annealin...

Abstract In this letter, authors demonstrate magnetoresistance of the order of 18% at room temperature for a focused-ion-beam-fabricated nanoconstriction with critical dimensions of the order of 35 nm. The main purpose of this work is to show that focused ion beam (FIB)-fabricated nanoconstrictions are relatively reproducible and thus could be further developed to obtain substantially larger magnetoresistance. Magnetoresistance is expected to increase if critical dimensions of nanoconstrictions are further reduced. The proposed focused-ion-bea...

Abstract In this letter, authors demonstrate magnetoresistance of the order of 18% at room temperature for a focused-ion-beam-fabricated nanoconstriction with critical dimensions of the order of 35 nm. The main purpose of this work is to show that focused ion beam (FIB)-fabricated nanoconstrictions are relatively reproducible and thus could be further developed to obtain substantially larger magnetoresistance. Magnetoresistance is expected to increase if critical dimensions of nanoconstrictions are further reduced. The proposed focused-ion-bea...

Abstract We have studied a system consisting of a superconducting Al strip placed close to a perpendicularly magnetized Co/Pd rectangle. The stray fields of the rectangle produce a nonhomogeneous magnetic field in the superconductor. These stray fields can efficiently compensate the self-field inside the current-carrying superconductor. We have observed a current-polarity dependence of the critical current. The compensation effects are strongly dependent on the current in the superconductor and also on the temperature. The studied configuratio...

Abstract A superconducting microtriangle is proposed to be used as a field-dependent diode. A dc voltage generated by the triangle induced by an applied ac drive is observed close to the superconducting/normal phase boundary. This effect is due to the superposition of the asymmetric screening currents in the triangle and the ac drive. The sign of the dc voltage is an alternating function of the applied magnetic field that reflects switching of the direction of the screening currents in the structure.

Abstract The influence of the spatial asymmetry of the pinning potential on the spectral composition of the voltage, induced in perforated superconducting Al bridges by the injection of a sinusoidal bias current, was investigated. The loss of the mirror symmetry of the pinning potential leads to the appearance of even Fourier components in the induced voltage in the vicinity of the superconducting phase transition line on the H-T diagram (H is the external magnetic field, and T is the temperature). Artificially-introduced asymmetry for vortex ...

Abstract The nucleation of the superconducting condensate in an Al film deposited on top of a periodic array of microsized Pb rings is investigated using transport measurements. We demonstrate that these Pb rings form tunable pinning sites which can be switched at will to repel or attract vortices in the Al film, depending on their magnetic history. After zero field cooling, a repulsive interaction between the rings and the vortices is observed, while after field cooling, the interaction becomes attractive. The flexibility of such current-indu...

Abstract A comparative study of the elastic modulus and uniformity of single-crystal SnO2 nanobelts is presented employing two nondestructive techniques based on atomic force microscopy: differential ultrasonic force microscopy (d-UFM) and atomic force acoustic microcopy (AFAM). In mapping mode both techniques revealed a uniform elastic response across the surface of the nanobelts as expected for single-crystal nanostructures. Comparative analyses of the local indentation modulus (probe area?100-400 nm2) were undertaken using both techniques a...

Abstract The authors study the flux pinning properties of superconductor/magnetic microring lattice hybrid structures. The used open triangular micromagnets represent an eightfold degree of freedom system, with six polarized and two flux-closure possible states. By conveniently choosing the magnetic state of the underlying rings, it is possible to induce different pinning potentials. They show that the magnetic vortex state with minimum stray field produces a weaker pinning in comparison with the polarized states.