PGS.TS Phạm Kim Ngọc: Thành quả ngọt ngào cho những ai đủ đam mê và kiên trì với khoa học

Gần 20 năm theo đuổi khoa học vật liệu, PGS.TS Phạm Kim Ngọc – Trưởng Bộ môn Vật liệu Nano và Màng mỏng, Khoa Khoa học và Công nghệ Vật liệu, Trường Đại học Khoa học tự nhiên, ĐHQG-HCM tin rằng quả ngọt sẽ dành cho những người đủ đam mê và kiên trì trên hành trình nghiên cứu. Năm 2025, PGS.TS Phạm Kim Ngọc là một trong ba nhà khoa học nữ Việt Nam được trao Học bổng L’Oréal – UNESCO “Vì sự phát triển phụ nữ trong khoa học” với đề án “Nghiên cứu và chế tạo linh...

Mời khảo sát và báo giá Dịch vụ trừ mối và kiếm soát chuột, mèo tại hai cơ sở Nguyễn Văn Cừ và Đông Hòa.

Thành phố Hồ Chí Minh, ngày 26 tháng 12 năm 2025 Kính gửi: Các đơn vị thi công tại Việt Nam Hiện nay, Trường Đại học Khoa học tự nhiên, ĐHQG-HCM có nhu cầu tiếp nhận báo giá để tham khảo, xây dựng giá gói thầu, làm cơ sở tổ chức lựa chọn nhà thầu gói thầu Dịch vụ trừ mối và kiếm soát chuột, mèo tại hai cơ sở Nguyễn Văn Cừ và Đông Hòa. Nội dung chi tiết như file đính kèm 0. Yêu cầu báo giá Phòng Quản trị Thiết bị (Phòng QTTB) kính mời Quý đơn...

Selector-Free 16 × 16 CrOX/TiO2-Based Memristor Array for Synaptic Dynamics and LTP/ LTD Emulation: Experimental–Computational Correlation

Selector-Free 16 × 16 CrOX/TiO2-Based Memristor Array for Synaptic Dynamics and LTP/ LTD Emulation: Experimental–Computational Correlation

Abstract This study presents a combined experimental–theoretical approach to understanding and optimizing CrOx-based self-rectifying memristor (SRM) for neuromorphic computing and provides a promising platform for selector-free, low-power crossbar arrays. By using a stencil-assisted DC sputtering technique, a 16 × 16 crossbar array is fabricated and exhibits reliable analog resistive switching, minimal sneak current (≈150 nA), and an excellent rectification ratio up to 2.56 × 103, demonstrating excellent scalability and array-level uniformity. Charge–voltage measurements reveal capacitor-coupled behavior, including nonlinear, time-dependent charge accumulation. The memristor supports key synaptic functions such as long-term potentiation/ depression (LTP/LTD) and excitatory postsynaptic current modulation, which is tunable...

Mott–Schottky Au/Co3O4 Decorated on a Carbon Cloth Substrate as an Efficiently Bifunctional Electrocatalyst for Hydrogen and Oxygen Evolution Reactions

Mott–Schottky Au/Co3O4 Decorated on a Carbon Cloth Substrate as an Efficiently Bifunctional Electrocatalyst for Hydrogen and Oxygen Evolution Reactions

Abstract Catalytic materials for water splitting must possess pivotal characteristics such as cost-effectiveness, robust stability, and high performance toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this study, we utilized a designed Mott–Schottky material, Au/Co3O4, developed in conjunction with a low-cost and robust material: carbon cloth. The findings revealed that 30 min of ultraviolet exposure is optimal for depositing Au nanoparticles, achieving the best balance between maximizing the Au loading content and minimizing the potential photochemical corrosion of Co3O4. The CC-30 material exhibited low overpotentials of 121 mV for the HER and 160 mV for the...

Cobalt-modified nitrogen-doped carbon nanotubes as bifunctional catalysts for one-pot synthesis of 2,5-diformylfuran from glucose

Cobalt-modified nitrogen-doped carbon nanotubes as bifunctional catalysts for one-pot synthesis of 2,5-diformylfuran from glucose

Graphical abstract  In this work, nitrogen-doped carbon nanotubes bearing Brönsted acid sites and Lewis acid sites were successfully synthesized and applied for “one-pot” synthesis of 2,5-diformylfuran from glucose.     Nguyen T.H.; Nguyen D.A.L.; Mai D.Q.; Le M.N.T.; Le D.D.; Phan H.B.; Tran P.H., https://doi.org/10.1016/j.jechem.2024.11.074

Macrophage-hitchhiked, effervescence-induced nanoemulsions for enhanced oral chemotherapy and immunotherapy: Impact on absorption route

Macrophage-hitchhiked, effervescence-induced nanoemulsions for enhanced oral chemotherapy and immunotherapy: Impact on absorption route

Abstract Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal cancer. Paclitaxel (PTX), typically administered intravenously (IV) as chemotherapy, shows promise for triggering immunogenic cell death (ICD) and may serve as a potential immunotherapy. This study introduces an oral PTX delivery method using an enteric-coated gelatin capsule containing capric acid oil and an effervescent agent, optionally with decylamine-conjugated β-glucans (DA-βGlus). Upon dissolving in the small intestine, the capsule undergoes an effervescence reaction that produces emulsified oil droplets (ODs) by bile salts, forming either Bared/ODs/PTX or DA-βGlus/ODs/PTX, with the latter featuring surface-attached DA-βGlus. The study evaluates the oral absorption, pharmacokinetics, and therapeutic efficacy of these formulations, comparing them to IV administration....

Multimodal missing data in healthcare: A comprehensive review and future directions

Multimodal missing data in healthcare: A comprehensive review and future directions

Abstract The rapid advancement in healthcare data collection technologies and the importance of using multimodal data for accurate diagnosis leads to a surge in multimodal data characterized by different types, structures, and missing values. Machine learning algorithms for predicting or analyzing usually demand the completeness of data. As a result, handling missing data has become a critical concern in the healthcare sector. This survey paper comprehensively reviews recent works on handling multimodal missing data in healthcare. We emphasize methods for synthesizing data from various modalities or multiple sources in imputing missing data, including early fusion, late fusion, and intermediate fusion methods for missing data imputation. The main objective of...

Validating polyp and instrument segmentation methods in colonoscopy through Medico 2020 and MedAI 2021 Challenges

Validating polyp and instrument segmentation methods in colonoscopy through Medico 2020 and MedAI 2021 Challenges

Abstract Automatic analysis of colonoscopy images has been an active field of research motivated by the importance of early detection of precancerous polyps. However, detecting polyps during the live examination can be challenging due to various factors such as variation of skills and experience among the endoscopists, lack of attentiveness, and fatigue leading to a high polyp miss-rate. Therefore, there is a need for an automated system that can flag missed polyps during the examination and improve patient care. Deep learning has emerged as a promising solution to this challenge as it can assist endoscopists in detecting and classifying overlooked polyps and abnormalities...

Comparative insight into negative electrode performance in lead-acid and lead-carbon batteries under high-load and partial state-of-charge cycling profiles

Comparative insight into negative electrode performance in lead-acid and lead-carbon batteries under high-load and partial state-of-charge cycling profiles

Abstract The resulting cycle performances from our previous studies are compared for operation in 50% depth-of-discharge (DoD) and 17.5% DoD at 50% state-of-charge (SoC) cycling profiles, representing two working modes: high load and partial state-of-charge, respectively. This comparative analysis examines test cells configured with negative electrode as the capacity-limiting component. This comparative analysis, based on prior independent studies, highlights the distinct degradation mechanisms influencing negative electrode sulfation, morphology, and electrochemical behavior between the two cycling regimes. While the 50% DoD profile creates more overall sulfation due to frequent discharge to half of rated capacity, it produces greater evenness in PbSO4 distribution across the electrode cross-sectional area. In contrast, the...

Tunnel-phase α-, β-, and γ-MnO2 for salt removal in hybrid capacitive deionization

Tunnel-phase α-, β-, and γ-MnO2 for salt removal in hybrid capacitive deionization

Abstract Urchin-like MnO2 polymorphs (α-, β-, and γ-) were successfully synthesized via a hydrothermal method with precise parameter optimization using a factorial design. This study provides the first comprehensive exploration of how tunnel-phase structures influence desalination performance in hybrid capacitive deionization. Among these polymorphs, α-MnO2 exhibited the most uniform urchin-like morphology with larger [2 × 2] tunnel structures, facilitating optimal ion transport and enhanced electrochemical properties. Electrochemical evaluations revealed that α-MnO2 achieved the highest specific capacitance of 148 F/g at 5 mV/s, significantly outperforming β-MnO2 and γ-MnO2. For desalination applications, α-MnO2 demonstrated a record-high NaCl adsorption capacity of 24.4 mg/g at 1.4 V, surpassing the performance of γ-MnO2 (14.5 mg/g) and β- MnO2 (5.5 mg/g). These findings underscore the transformative potential of...