Results 81 to 90 of about 315,024 (299)

Principles and promise of Fabry-Perot resonators at terahertz frequencies [PDF]

open access: yes, 2011
Fabry–Perot resonators have tremendous potential to enhance the sensitivity of spectroscopic systems at terahertz (THz) frequencies. Increasing sensitivity will be of benefit in compensating for the relatively low power of current high resolution ...
Blake, G. A., Braakman, R.
core   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

open access: yesAdvanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova   +2 more
wiley   +1 more source

CONSTRUCTION OF A PARABOLIC SOLAR COLLECTOR AND COMPARATIVE STUDY OF THE PERFORMANCE OF ALUMINUM-COATED PELLICLE FILM AND ALUMINUM FOIL AS REFLECTING SURFACES [PDF]

open access: yesJournal of Sustainable Energy, 2020
Most of the concentrators used in solar thermal systems are made from mirrors or metals with mirror or other highly reflective surfaces. Because mirror is the best reflecting surface for solar collectors and parabolic mirrors are expensive, people in the
OHAJIANYA, A. C.
doaj  

Direct Metal Deposition of Graphene–Ti28Nb35.4Zr Matrix Composites With Enhanced Mechanical, Corrosion, and Biocompatibility Properties for Bone Implants

open access: yesAdvanced Engineering Materials, EarlyView.
Graphene nanoplatelet (0.1 wt.%) reinforcement significantly enhances the performance of β Ti‐28Nb‐35.4Zr alloy. Grain refinement, reduced water contact angle, and improved surface characteristics promote osteoblast adhesion and complete surface coverage after 7 days.
Khurram Munir   +5 more
wiley   +1 more source

Metals in Metal Salts: A Copper Mirror Demonstration

open access: yesJournal of Chemical Education, 2010
A simple lecture demonstration is described to show the latent presence of metal atoms in a metal salt. Copper(II) formate tetrahydrate is heated in a round-bottom flask forming a high-quality copper mirror.
openaire   +2 more sources

(Acetylacetone isonicotinoylhydrazonato-κ3O,N′,O′)dioxidovanadate(V) monohydrate

open access: yesActa Crystallographica Section E, 2010
The hydrazone anion in the title compound, [V(C11H12N3O2)O2]·H2O, is zwitterionic as its pyridyl N atom is protonated; the O, N and O′ atoms span the axial–equatorial–axial positions of the trigonal-bipyramidal ...
Hon Wee Wong, Kong Mun Lo, Seik Weng Ng
doaj   +1 more source

1.5V fully programmable CMOS Membership Function Generator Circuit with proportional DC-voltage control [PDF]

open access: yes, 2013
A Membership Function Generator Circuit (MFGC) with bias supply of 1.5 Volts and independent DC-voltage programmable functionalities is presented. The realization is based on a programmable differential current mirror and three compact voltage-to-current
Molinar-Solis, J. E.   +4 more
core   +1 more source

Influence of Surface Finish on the Tribological Performance of AlTiBN Coatings Deposited on Forming Tools

open access: yesAdvanced Engineering Materials, EarlyView.
Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver   +9 more
wiley   +1 more source

Gap plasmonic properties of NPOM structures composed of gold nanoparticles and thin films

open access: yesScientific Reports
Metal nanoparticles have attracted great interest because of their unique near-field enhancement properties, and have important applications in many fields, such as surface-enhanced Raman scattering (SERS), fluorescence enhancement, solar cell efficiency
Feng Shan   +10 more
doaj   +1 more source

Probing of sub-picometer vertical differential resolutions using cavity plasmons

open access: yesNature Communications, 2018
Plasmon rulers can be used for resolving ultrasmall material changes. Here, the authors show how cavity plasmons in a metal nanowire-on-mirror setup can be used to probe vertical dimensional changes with sub-picometer differential resolution using two ...
Wen Chen   +3 more
doaj   +1 more source

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