Results 121 to 130 of about 153,313 (366)

Measuring and Manipulating Density of States in Two‐Dimensional Materials With Electrochemical Capacitance

open access: yesAdvanced Materials Interfaces, EarlyView.
We report electrochemical quantum capacitance spectroscopy as an ambient, in situ probe for defect‐mediated electronic structure at 2D material interfaces. Using monolayer MoS2, the method resolves band edges and vacancy states, tracks sulfur‐vacancy evolution during hydrogen evolution, and links interfacial density‐of‐states changes to nearly ...
Mengyu Yan   +9 more
wiley   +1 more source

Energy Band Alignment and Electro‐Optical Behavior of Nearly Unstrained Monolayer MoS2 Heterostructures With GaN

open access: yesAdvanced Materials Interfaces, EarlyView.
Large size (∼100 µm) monolayer MoS2 grown by LPI‐CVD on n‐GaN exhibit a high n‐type doping, very low strain, and a type‐I band alignment at MoS2/GaN interface. Photocurrent measurements under illumination with photon energies from ∼2 to ∼5 eV show superior electro‐optical performances of these MoS2/n‐GaN heterojunctions as compared to Ni/n‐GaN devices ...
Salvatore Ethan Panasci   +12 more
wiley   +1 more source

High-power slab-based Tm:YLF laser for in-band pumping of Ho:YAG

open access: yes, 2008
Several remote sensing applications require pulsed sources in the mid-infrared spectral regime with high average powers and good beam quality. Ho:YAG lasers have a number of attractive features for high power generation at 2.1 microns, either for direct ...
J. I. Mackenzie   +7 more
core   +1 more source

Open Surgical Treatment Versus Laser Therapy of Pilonidal Sinus: A Single Institutional Observational Study

open access: yesMedical Journal of Babylon
Background: Research findings have been published, demonstrating the efficacy of laser therapy in managing pilonidal sinus (PNS). Objectives: To compare the laser and open methods for treating PNS and their effects on patient activity, return to work ...
Alaa Abood Najim Al Wadees   +5 more
doaj   +1 more source

Magnetic‐Field Modulation of Charge Transport in Non‐Fullerene Semiconductors for Enhanced Hydrogen Evolution

open access: yesAdvanced Materials Interfaces, EarlyView.
ABSTRACT This study demonstrates that weak magnetic fields (16–40 mT) increase the efficiency of the hydrogen evolution reaction (HER) in electrocatalysts based on non‐fullerene acceptor (NFA) derivatives IT‐4Cl and Y6. Electrochemical measurements reveal that the application of the magnetic field reduces the onset potential and increases the current ...
João Paulo Araujo Souza   +7 more
wiley   +1 more source

Gas sensing based on optical fibre coupled diode laser spectroscopy : a new approach to sensor systems for safety monitoring

open access: yes, 2009
We describe an entirely passive fibre optic network which senses, amongst other species, CH¬4¬ and CO¬¬2 , with sensitivity and selectivity compatible with safety sensing in the mine environment.
Walsh, Douglas   +5 more
core  

An experimental comparison of nonlinear and parabolic tapered waveguide lasers and a demonstration of broad-stripe diode pumping

open access: yes
This paper compares the laser performance of linear and parabolic tapered waveguides in ion-exchanged Nd:Glass, finding significant advantage for the linear guides, with demonstrated adiabatic expansion to widths of 250µm.
Li, C.   +4 more
core   +1 more source

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