Tác giả: Trần Tuấn Phương (Phương Trần Tuấn)

Abstract In this study, S-scheme heterojunction photocatalysts composed of SnO2 and ZnSn(OH)6 (ZHS) were synthesized via a one-step hydrothermal method. The resulting ZHS/SnO2 (ZS) composites exhibited high crystallinity, enhanced light-harvesting capability, and a well-defined interfacial architecture, all of which synergistically facilitated efficient charge carrier separation through an n–n type step-scheme (S-scheme) mechanism. The enhanced photocurrent response confirmed accelerated...

Abstract This study investigated the modification of TiO2 photoanodes using reduced graphene oxide (rGO) to enhance electron transport channels and prevent recombination processes, thereby improving the photovoltaic performance. Through the ultraviolet (UV)-assisted photoreduction of GO on TiO2 coated on a fluoride tin oxide substrate (FTO|TiO2), we demonstrated the successful integration of rGO. This was evidenced by the increased Csp2 content observed during X-ray photoelectron spectroscopy...

Abstract Cellulose-based electronic devices show great potential for the development of advanced green electronics, such as digital resistive switching (RS) memory and analog RS artificial synapses. Previous studies on two-terminal devices have primarily used cellulose as a channel for the formation and rupture of metallic conductive filaments that directly govern the RS behavior. This means...

Abstract The WO3 semiconductor emerges as a photocatalytic material of remarkable potential in harnessing solar radiation absorption capabilities, with promising applications in the photocatalytic treatment of organic compounds. Nonetheless, a primary limitation in the fast recombination of photogenerated electrons and holes is caused by an ill-suited ECBM energy level, resulting in electrons not reacting with dissolved oxygen....

Abstract Hybrid materials possess the unique properties of their individual components, enabling their use in multiple synergistic applications. In this study, we synthesized biogenic fluorescent carbon dots (CDs) decorated with biodegradable periodic mesoporous organosilica nanoparticles (BPMO), creating BPMO@CDs. The CDs, approximately 9.8 nm in diameter, were derived from Musa paradisiaca cv. Awak juice using a rapid microwave method, exhibiting...

Abstract Speech enhancement plays a crucial role in improving speech clarity and intelligibility in noisy environments, benefiting applications such as telecommunications, assistive hearing, voice-activated systems, and automatic speech recognition. Although transformer and conformer-based models achieve state-of-the-art performance, their complexity makes real-time deployment on resource-constrained devices impractical. In contrast, convolutional neural networks offer efficient on-device deployment due to their lower...

Abstract Bi-doped ZnO thin films were deposited on glass substrates using radio frequency magnetron sputtering, with varying concentrations of impurities. The effect of Bi concentration on the structural, electrical, and optical properties of these films was investigated. This study indicates that a doping concentration of 1 at% Bi is optimal for enhancing the crystalline quality and photoelectric characteristics of the ZnO films. At this concentration, the films...

Abstract Polyp shape is critical for diagnosing colorectal polyps and assessing cancer risk, yet there is limited data on segmenting pedunculated and sessile polyps. This paper introduces PolypDB_INS, a dataset of 4403 images containing 4918 annotated polyps, specifically for sessile and pedunculated polyps. In addition, we propose DYNAFormer, a novel transformer-based model utilizing an anchor...

Abstract This study presents a thorough kinetic mechanism of the OH-initiated reaction of fulvenallene (C7H6), a crucial intermediate in the formation of polycyclic aromatic hydrocarbons (PAHs), over a wide T and P range (T = 200 – 2000 K and P = 0.76 – 76,000 Torr), using different computational tools. The temperature- and pressure-dependent behaviors of the title system were investigated through...