Quantized nano-objects offer a myriad of exciting possibilities for manipulating electrons and light that impact photonics, nanoelectronics, quantum information. In this context, ultrashort laser pulses combined with nanotips field emission have permitted renewing nano-characterization control electron dynamics unprecedented space time resolution reaching femtosecond even attosecond regimes. A ...

Abstract We performed multiscale-multiphysics simulations for W, Mo and Cu nanotips under high electric field to investigate their structural evolution thermal runaway process. The critical values the prebreakdown condition are predicted be 311 MV m −1 , 570 675 Cu, W respectively ( R 0 = 1 nm, H 100 nm). boiling point of metal is found a good predictor strength initiation runaway. For made ref...

We report the discovery of vertically aligned nano-scale diamond tips grown on the polycrystalline diamond substrates in a CH4/N2/H2 mixed plasma. The best diamond quality occurs at the top part of the nanotip, which is single crystalline diamond. The quality of the diamond nanotip is justified by the diamond characteristic peak at 1332 cm 1 in the Raman spectrum, the discrete electron diffract...

Electric detection using a nanocomponent may lead to platforms for rapid and simple biosensing. Sensors composed of nanotips or nanodots have been described for highly sensitive amperometry enabled by confined geometry. However, both fabrication and use of nanostructured sensors remain challenging. This paper describes a dendritic nanotip used as an amperometric biosensor for highly sensitive d...

We report on a systematic study of highly enhanced optical field and its induced thermal transport in nanotips under laser irradiation. The effects on electric field distribution caused by curvature radius, tip aspect ratio, and polarization angle of the incident laser are studied. Our Poynting vectors' study clearly shows that when a laser interacts with a metal tip, it is bent around the tip ...

The ability to probe tip-sample interactions by Atomic Force Microscopy (AFM) has recently boosted our understanding of the matter at atomic scale, enabling study properties surfaces and adsorbates which were previously inaccessible. Nevertheless, this sensitivity forces presents some drawbacks, as requirement a sharp tip apex prevent loss spatial resolution due existence long-range interaction...

A symmetrical approach is suggested (Chang DE et al. Nat Phys 3:807, 2007) to realize a single-photon transistor, where the presence (or absence) of a single incident photon in a ‘gate’ field is sufficient to allow (prevent) the propagation of a subsequent ‘signal’ photon along the nanowire, on condition that the ‘gate’ field is symmetrically incident from both sides of an emitter simultaneousl...

Background Left Ventricular (LV) twist, defined as the difference in rotation between the apex and the base, has recently been suggested as a diagnostic imaging biomarker for LV dysfunction [1]. Increasing age is associated with an increase in apical rotation, which leads to an increase LV twist [2-4]. Recently, it has been suggested that LV circumferential-longitudinal shear angle (CL-shear an...

Nanostructured tip-shaped biosensors have drawn attention for biomolecule detection as they are promising for highly sensitive and specific detection of a target analyte. Using a nanostructured tip, the sensitivity is increased to identify individual molecules because of the high aspect ratio structure. Various detection methods, such as electrochemistry, fluorescence microcopy, and Raman spect...

Filament-type HfO2-based RRAM has been considered as one of the most promising candidates for future non-volatile memories. Further improvement of the stability, particularly at the "OFF" state, of such devices is mainly hindered by resistance variation induced by the uncontrolled oxygen vacancies distribution and filament growth in HfO2 films. We report highly stable endurance of TiN/Ti/HfO2/S...