Results 71 to 80 of about 15,310 (342)

Protective coatings on medical implants by reactive diffusion [PDF]

, 2000
Wear resistant and corrosion resistant surfaces are important for medical implants. Wear resistance is especially important for articulating surfaces in load bearing applications such as total hip and total knee replacements.
Cordes, Heiner, Hegger, Josef, Nowak, Damian   +2 more
core   +1 more source

Peptide Sequencing With Single Acid Resolution Using a Sub‐Nanometer Diameter Pore

Advanced Functional Materials, EarlyView.
To sequence a single molecule of Aβ1−42–sodium dodecyl sulfate (SDS), the aggregate is forced through a sub‐nanopore 0.4 nm in diameter spanning a 4.0 nm thick membrane. The figure is a visual molecular dynamics (VMD) snapshot depicting the translocation of Aβ1−42–SDS through the pore; only the peptide, the SDS, the Na+ (yellow/green) and Cl− (cyan ...
Apurba Paul, Archith Rayabharam, Lisa Almonte, Eveline Rigo, Joshy Joseph, Ashutosh Kumar, Zhuxin Dong, Narayana Aluru, Gregory Timp   +8 more
wiley   +1 more source

Surface Modification of Ferritic Stainless Steel by Active Screen Plasma Nitriding [PDF]

, 2012
Plasma nitriding is a surface modification process with a low environmental impact. Active screen plasma nitriding (ASPN) is one of the new plasma nitriding technologies, and can eliminate problems related to conventional direct current plasma nitriding (
Nii Hiroaki, Nishimoto Akio, 二井 裕瑛, 西本 明生   +3 more
core   +2 more sources

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

Investigation of formation of hardened layer on titanium alloys by the method of ion-plasma nitriding

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2019
Various methods are applied in the world practice to increase wear resistance, fatigue strength and corrosion resistance of aviation equipment, machinery and medicine parts made of titanium and its alloys.
I. L. Pobol, I. G. Oleshuk, A. N. Drobov, Sun Feng, Wang Lin   +4 more
doaj   +1 more source

Upconversion Nanoparticles Embedded Photonic Contact Lens for Transepithelial Corneal Crosslinking Using Hyaluronate – Riboflavin Conjugate

Advanced Functional Materials, EarlyView.
A minimally invasive, transepithelial corneal cross‐linking (TE‐CXL) approach is presented using upconversion nanoparticles (UCNPs)‐loaded contact lenses (UCLs), after topical delivery of hyaluronate–riboflavin conjugates. The NIR‐to‐UV/blue light conversion by UCNPs in a UCL can activate riboflavin for TE‐CXL, resulting in the biomechanical strength ...
Gibum Lee, Inhoo Choi, Anara Molkenova, Yengwoo Son, Seungmin Yang, Mina Kwon, Tae‐Im Kim, Ki Su Kim, Sei Kwang Hahn   +8 more
wiley   +1 more source

The effect of plasma nitriding duration on the tribological performance of Ni-B-Gr self-lubricant composite coatings on AISI 4140 steel

Journal of Materials Research and Technology
This study investigates the tribological characteristics of Nickel-Boron-Graphite (Ni-B-Gr) self-lubricating composites, focusing on the impact of plasma nitriding duration on wear resistance in AISI 4140 steel.
Vahid Niksefat, Farzad Mahboubi
doaj   +1 more source

Cathodic Cage Plasma Nitriding of Ti6Al4V Alloy

Medžiagotyra, 2016
Glow discharge nitriding is being used increasingly more often for modifying the properties of titanium and its alloys with the aim to increase their frictional wear resistance, fatigue strength, and, in the case of medical applications, to eliminate the
Maciej OSSOWSKI, Tomasz BOROWSKI, Michal TARNOWSKI, Tadeusz WIERZCHON   +3 more
doaj   +1 more source

Wafer‐Scale Synthesis of Mithrene and its Application in UV Photodetectors

Advanced Functional Materials, EarlyView.
A controlled tarnishing step on the silver surface precedes the solid‐vapor‐phase chemical transformation into silver phenylselenolate thin films. The approach yields crystals exceeding 1 µm with improved in‐plane orientation. Integration on graphene phototransistors demonstrates high photoresponsivity, positioning mithrene as a promising material for ...
Maryam Mohammadi, Stefanie L. Stoll, Analía F. Herrero, Sana Khan, Federico Fabrizi, Christian Gollwitzer, Zhenxing Wang, Surendra B. Anantharaman, Max C. Lemme   +8 more
wiley   +1 more source

Rotating bending fatigue properties of medium alloy Cr and Mo nitriding bearing steel

Journal of Hebei University of Science and Technology, 2019
In order to study the influence of chemical heat treatment on the fatigue performance of large bearings, plasma nitriding and rotating bending fatigue test are conducted for the medium alloy Cr and Mo nitriding bearing steel.
Nianlun YU, Shiqing SUN
doaj   +1 more source