5 research outputs found
The prevalence of GERD symptoms in functional dyspeptic patients with and without H.pylori and the absence of any change in esophageal function after H.pylori eradication
No full textIn an asian population the predominant dyspeptic symptom can differentiate between Helicobacter pylori positive and negative patients with functional dyspepsia
No full textDemographic and clinical features suggests that patients with functional dyspepsia-irritable bowel syndrome(FD-IMS)comprise a distinct syndrome
No full textOlanzapine pharmacokinetics are similar in Chinese and Caucasian subjects
No full text10.1046/j.1365-2125.2003.01857.xBritish Journal of Clinical Pharmacology562184-187BCPH
Fabrication of PtIrPd noble metal medium entropy alloy thin film by atomic layer deposition
No full textNoble metal medium entropy alloy (MEA) thin films have recently attracted enormous research interests recently because of their great potential in the catalytic application. However, conventional bottom-up fabrication methods for MEA thin film such as magnetron sputtering face enormous challenges including precise control over film thickness and consumption of costly high-purity noble metal targets. Herein, a facile and tunable approach is developed coupling sequential atomic layer deposition (ALD) of noble metal layers with electric Joule heating (EJH) alloying process to grow platinum-iridium-palladium (PtIrPd) MEA thin films. The PtIrPd MEA thin film with a thickness of ≈20 nm and an atomic ratio of 35:35:30 is successfully fabricated. The effect of EJH processing temperature on the film morphology and structure evolution is investigated. ALD provides flexibility in the metal deposition sequence with meticulous thickness control and atomic composition precision, while the ultrafast EJH ramping/cooling rates promote homogeneous alloying of MEA combinations inhibiting phase separation. Furthermore, the integrated method circumvents a major obstacle of finding a common ALD temperature window for different noble metal precursors as well as opens new pathways for the controllable synthesis of multicomponent metal alloy thin films with potential catalytic, magnetic, and optical properties.Agency for Science, Technology and Research (A*STAR)Ministry of Education (MOE)Submitted/Accepted versionY.Z. and L.J. contributed equally to this work. The authors acknowledge the funding supported by the Agency for Science, Technology and Research (A*STAR), AME Individual Research Grant (IRG) A1983c0032. K.W.T. and L.W. acknowledges funding support from the Singapore Ministry of Education AcRF Tier 2 grant (MOET2EP 50221-0017)
