21 research outputs found
Is there a predictive significance of ABO blood group on chemotherapy-induced thrombocytopenia in patients with stage III colon cancer?
Deficiency in surface expression of E-selectin ligand promotes lung colonization in a mouse model of breast cancer
Promotion of CO Oxidation on Bimetallic Au−Ag(110) Surfaces: A Combined Microscopic and Theoretical Study
Inflammation-Based Prognostic System Predicts Postoperative Survival of Colorectal Cancer Patients with a Normal Preoperative Serum Level of Carcinoembryonic Antigen
Critical importance of van der waals stabilization in strongly chemically bonded surfaces:Cu(110):O
Role of Deprotonation and Cu Adatom Migration in Determining the Reaction Pathways of Oxalic Acid Adsorption on Cu(111)
Scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and first principles theoretical calculations have been used to gain insight into the fundamental processes involved in the adsorption and self-assembly of oxalic acid on Cu(111). The experimental data demonstrate that several reaction pathways are involved in the chemisorption of oxalic acid on Cu(111), one of which leads to deprotonation of the acid into oxalate molecules that form ordered structures on the surface. Theoretical calculations indicate that the adsorption of oxalate molecules is not stable on the surface unless copper adatoms are taken into consideration. Coordination with copper adatoms prevents oxalate molecules from getting closer to the substrate, precluding the expected decomposition of oxalate into carbon dioxide. Our results, thus, suggest that the 2D gas of diffusing copper adatoms might play a very important role in the self-assembly of the molecules not only by catalyzing the deprotonation of oxalic acid but also by decreasing the surface reactivity