High Temperature Corrosion, High Temperature Coating Protection, High Temperature Materials, Advanced Materials,
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Scopus Publications
Scopus Publications
Constructing Fe3O4/HA/L-ac Hybrid Nanocomposites as Excellent Antimicrobial Agents and Drug Delivery Vehicles Yuanita Amalia Hariyanto, Ainun Nikmah, S. T. Ulfawanti Intan Subadra, Hendra Susanto, Sunaryono, Hadi Nur, Siriwat Soontaranoon, Dahlang Tahir, Hubby Izzuddin, Ahmad Taufiq Journal of Biomedical Materials Research Part B Applied Biomaterials, 2026 In recent decades, death rates from microbial infections and cancer have been increasing. This increase is triggered by the limited effectiveness of existing treatments, such as the use of antibiotics, which are considered less effective due to the development of antibiotic resistance. Furthermore, cancer treatments such as chemotherapy have been reported to produce negative effects on the patient's body. Therefore, alternative treatments are urgently needed, such as developing drug delivery platforms and nanomaterial‐based antimicrobial agents. This study aims to develop new hybrid nanocomposites, combining inorganic–organic materials, namely Fe 3 O 4 /HA/L‐ac (L‐ac = L‐aspartic acid and HA = hydroxyapatite), as antimicrobial agents and drug delivery vehicles. In this case, Fe 3 O 4 , a well‐known nanomaterial for antimicrobial agents and drug delivery vehicles, was optimized by combining it with HA and L‐ac. The successful formation of nanocomposites was confirmed by X‐ray diffraction and Fourier transform infrared spectroscopy. We found that the antimicrobial activity of the composites increased with increasing HA content. HA contributed to the formation of reactive oxygen species and released active ions from nanoparticles through the interaction between the active sites of proteins and antibacterial agents, causing cell lysis. The increased antimicrobial activity was also influenced by electrostatic interactions in the nanocomposite particles, which penetrated the membrane and damaged the microbial cells. As drug delivery vehicles for cancer treatment, the nanocomposites effectively released doxorubicin (DOX), achieving 70% release within the first 45 min and nearly 97%–99% overall. The increased release was associated with a proton exchange mechanism at the primary amine group of DOX. Therefore, the prepared Fe 3 O 4 /HA/L‐ac hybrid nanocomposites possess high potential for dual applications as antimicrobial agents and drug delivery vehicles.
Influence of Cr3C2-NiCr Coating Thickness on Corrosion Behavior of Carbon Steel in Alkali Chloride Atmospheres Safitry Ramandhany, Djoko Triyono, Eni Sugiarti, Hubby Izzuddin, Agus Sukarto Wismogroho, Ahmad Afandi, Jayadi, Wahyu Bambang Widayatno, Nurul Latifah, Kurotun Aini Journal of Physics Conference Series, 2025 The development of protective coatings against alkali-induced high-temperature corrosion is critical for extending the service life of components in aggressive environments such as boiler co-firing biomass. This study investigated the influence of Cr 3 C 2 -NiCr coating thickness on the corrosion performance of A516 carbon steel substrates exposed to alkali chloride vapor (NaCl + 55 wt% KCl) at 600 °C for 100 hours. Cr 3 C 2 -NiCr as the coating material was deposited by High Velocity Oxy Fuel (HVOF) spraying with approximate thicknesses of 150 µm and 20 µm. Their degradation behaviors were evaluated through mass change measurements, corrosion rate analysis, and detailed microstructural characterization using field emission-scanning electron microscopy (FE-SEM) equipped with electron dispersive spectroscopy (EDS), X-Ray Diffraction (XRD), and surface hardness testing. The thicker coating of 150 µm exhibited a significantly lower corrosion rate (0.15 mm/y during the first 20 hours) than the thinner coating of 20 µm, which experienced rapid degradation and visible spallation after 40 hours. XRD analysis revealed that the surface of the thicker coating was dominated by Cr 2 O 3 and NiCr 2 O 4 . In contrast, the thinner coating formed a more complex oxide mixture consisting of Cr 2 O 3 , NiCr 2 O 4 , Fe 3 O 4 , and NaCrO 2 , indicating a severe corrosion attack to the thinner coating and substrate. The underlying mechanisms of alkali salt vapor corrosion for both coating thicknesses are explained in this paper, offering understanding into microstructural of Cr 3 C 2 -NiCr coating on A516 carbon steel in corrosive high-temperature environments.
The Corrosion and Mechanical Behavior of Zirconium Alloy for Alkali Fusion Process at High Temperature Resetiana D. Desiati, Agus S. Wismogroho, Eni Sugiarti, Marga A. J. Mulya, Wahyu B. Widayatno, Didik Aryanto, Abdul Basyir, M. Ikhlasul Amal, Jayadi Jayadi, Bambang Hermanto, Hubby Izzudin, Ahmad Affandi, Toto Sudiro, Shokhul Lutfi, Ilham H. Manangkasi, Suryadi Suryadi, Cherly Firdharini, Felli Rusumayanti, Ahmad N. Muslimin, Jayanudin Jayanudin, Fahamsyah H. Latief, Agus Ismail, Haris Rudianto, M. Robby Firmansyah JOM, 2024
HA/ZrO2Coating on CoCr Alloy Using Flame Thermal Spray Hans Juliano, Femiana Gapsari, Hubby Izzuddin, Toto Sudiro, Krisna Yuarno Phatama, William Putera Sukmajaya, Zuliantoni, Thesya Marlia Putri, Abdul M Sulaiman Evergreen, 2022
