Article
Materials Science, Ceramics
Andjelika Bjelajac, Rada Petrovic, George E. Stan, Gabriel Socol, Andreea Mihailescu, Ion N. Mihailescu, Katerina Veltruska, Vladimir Matolin, Zdravko Siketic, George Provatas, Milko Jaksic, Djordje Janackovic
Summary: Anodization and annealing were used to prepare a nanotubular TiO2 photoanode, and it was found that C-doping improved the crystallinity and absorption properties of TiO2. Pulsed laser deposition was applied for covering Bi2O3 on the nanotubes, leading to enhanced photoelectrochemical performance.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Paul Ganea, Gabriel Socol, Sorin Zamfira, Nicolae Cretu, Elena Matei, Adam Lorinczi
Summary: The As2S3-Cu interface was studied using dielectric spectroscopy measurements to understand the charge carriers' contribution to the electrical properties. The experiment showed that the thin film heterostructure can be modified electrically and optically, making it a potential candidate for photodetectors.
Article
Materials Science, Multidisciplinary
Maria Badiceanu, Sinziana Anghel, Natalia Mihailescu, Anita Ioana Visan, Cristian N. Mihailescu, Ion N. Mihailescu
Summary: The development of new biological devices requires continuous efforts in improving the functionalization based on materials and fabrication techniques. Laser techniques provide effective deposition methods to enhance coating adherence and biological characteristics without compromising mechanical properties. This review discusses various laser techniques compared to other deposition methods.
Article
Materials Science, Multidisciplinary
Dorel F. Albu, Jeanina Lungu, Gianina Popescu-Pelin, Cristian N. Mihailescu, Gabriel Socol, Adrian Georgescu, Marcela Socol, Alexandra Banica, Victor Ciupina, Ion N. Mihailescu
Summary: Active TiO2 semiconductor layers were synthesized using pulsed laser deposition under different gas atmospheres, and the morphological and structural characteristics of the TiO2 nanostructures were investigated. It was found that the gas nature played a key role in the deposited film's architecture and overall performance. The photovoltaic structures based on TiO2 coatings grown in He exhibited the best electro-optical performance.
Article
Physics, Applied
C. L. Hapenciuc, I. Negut, A. Visan, T. Borca-Tasciuc, I. N. Mihailescu
Summary: Scanning thermal microscopy is widely recognized for thermal conductivity measurement of bulk and nanostructured materials. Wollaston probes are used in contact or noncontact mode for this purpose, offering spatial resolution from micrometers to nanometers. A study on errors due to contact point asymmetry shows the need for a new theoretical model, which can be applied to any probe size and type.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Mihaela Birdeanu, Ion Fratilescu, Camelia Epuran, Alin Constantin Murariu, Gabriel Socol, Eugenia Fagadar-Cosma
Summary: The purpose of this research is to develop novel steel coating systems for mechanical equipment used in aggressive acid conditions. Homogeneous sandwich-type layered films on the surface of steel electrodes were realized using a pseudo-binary oxide and two different porphyrin derivatives. The electrochemical measurements showed that the corrosion-resistant coating exhibited high inhibition efficiency against corrosion.
Editorial Material
Materials Science, Multidisciplinary
Emanuel Axente, Gabriel Socol
Article
Chemistry, Analytical
Bianca-Georgiana Solomonea, Luiza-Izabela Jinga, Vlad-Andrei Antohe, Gabriel Socol, Iulia Antohe
Summary: A gold-coated reflection-type fiber optic-surface plasmon resonance (Au-coated FO-SPR) sensor is manufactured and functionalized with different materials for the sensitive detection of cadmium ions (Cd2+) in water. The BSA-functionalized FO-SPR sensor is found to be highly sensitive, with a limit of detection at the nanomolar level. The presence of Cd2+ on the sensor surface was confirmed and quantified using X-ray photoelectron spectroscopy (XPS). This study demonstrates that the BSA-functionalized FO-SPR sensor is a sensitive, rapid, cheap, and portable method for monitoring trace-level amounts of Cd in water.
Article
Chemistry, Physical
Marcela Socol, Nicoleta Preda, Carmen Breazu, Gabriela Petre, Anca Stanculescu, Ionel Stavarache, Gianina Popescu-Pelin, Andrei Stochioiu, Gabriel Socol, Sorina Iftimie, Christine Thanner, Oana Rasoga
Summary: There is a growing interest in organic photovoltaic (OPV) cells due to their properties and compatibility with various substrates. However, their efficiencies are low compared to silicon cells, and improvements are being sought through electrode nanostructuring, synthesis of new materials, and use of additives. In this study, the behavior of a common organic bulk heterojunction was examined when deposited on different substrates and with/without an additive. The results showed that the morphology of the films can be modified and their roughness decreased with the addition of a small quantity of additive. Micro-patterning of the electrode also increased the absorption of the photovoltaic structures.
Article
Chemistry, Multidisciplinary
Luiza Izabela Toderascu, Livia Elena Sima, Stefana Orobeti, Paula Ecaterina Florian, Madalina Icriverzi, Valentin-Adrian Maraloiu, Cezar Comanescu, Nicusor Iacob, Victor Kuncser, Iulia Antohe, Gianina Popescu-Pelin, George Stanciu, Petre Ionita, Cristian N. N. Mihailescu, Gabriel Socol
Summary: In this study, L-Cysteine-coated magnetic iron oxide nanoparticles loaded with doxorubicin were synthesized and extensively characterized. The binding of doxorubicin to L-Cysteine was confirmed, and the internalization of the nanoparticles delivering doxorubicin was observed in melanoma cells. The nanoparticles also modulated cell signaling pathway activity, induced cell cycle arrest and apoptosis, and exhibited pH-dependent drug release. These results demonstrate the potential of the nanoparticles as efficient drug delivery vehicles in melanoma therapy.
Article
Chemistry, Physical
Adriana Elena Balan, Ali AL-Sharea, Esmaeil Jalali Lavasani, Eugenia Tanasa, Sanda Voinea, Bogdan Dobrica, Ioan Stamatin
Summary: In this study, multilayer graphene-paraffin composites with different graphene contents were prepared and characterized. The addition of graphene led to a decrease in energy storage capacity but a significant improvement in thermal conductivity. The composite material was used as a thermal heat sink for an embedded electronic processor, reducing the operating temperature by up to 20% and improving its performance.
Article
Chemistry, Physical
Marcela Socol, Nicoleta Preda, Carmen Breazu, Andreea Costas, Oana Rasoga, Gabriela Petre, Gianina Popescu-Pelin, Sorina Iftimie, Andrei Stochioiu, Gabriel Socol, Anca Stanculescu
Summary: Nanocomposite films based on macrocyclic compounds (ZnPc and TPyP) and metal oxide nanoparticles (ZnO or CuO) were prepared by MAPLE, and the effect of metal oxide addition on the properties of the films was evaluated. The presence of metal oxide nanoparticles influenced the infrared and UV-Vis spectra, as well as the photoluminescence spectra of the films. The morphology of the composite films showed agglomerated particles, but did not significantly affect the roughness. The electrical parameters of the structures based on the nanocomposite films were improved only for films with a certain type and optimum amount of metal oxide nanoparticles.
Article
Materials Science, Multidisciplinary
Marcela-Elisabeta Barbinta-Patrascu, Sorina Iftimie, Nicoleta Cazacu, Diana Lavinia Stan, Andreea Costas, Adriana Elena Balan, Claudia Gabriela Chilom
Summary: Protein-based nanoparticles, particularly albumin nanoparticles, are important in nanomedicine for drug delivery. They possess special properties, such as biocompatibility and biodegradability, making them advantageous for biomedical applications. In this study, bovine serum albumin nanoparticles were prepared using different nanoprecipitation methods and characterized using UV-Vis spectroscopy, SEM, and AFM. The stability of the nanoparticles was monitored over time, and biohybrids containing the nanoparticles and chlorophyll-labeled artificial cell membranes were developed and characterized. These findings have potential applications in novel drug carrier systems and bio-coatings for the biomedical field.
Review
Pharmacology & Pharmacy
Anita Ioana Visan, Rodica Cristescu
Summary: Therapeutic polysaccharide-based coatings have the potential to transform medical implants into drug delivery systems. However, further research is needed to fully understand the drug degradation/release profiles of these coatings before they can be used in clinical applications. This review paper provides a comprehensive description of the benefits and challenges of polysaccharide-based coatings, discusses the latest advances in drug delivery using different types of polysaccharide coatings, and gives recommendations for future research to accelerate the translation of polysaccharide-based drug delivery systems from the laboratory to the clinic.
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)