Article
Plant Sciences
Kaja Kupnik, Mateja Primozic, Zeljko Knez, Maja Leitgeb
Summary: Commercial products made from natural resources often contain additives to enhance their biological activities. A comparative study on the antimicrobial properties of aloe and its commercial products showed that natural samples exhibited antimicrobial activity against a variety of microorganisms. Fresh juice and gel of Aloe arborescens showed particularly good antimicrobial efficacy on tested microorganisms, suggesting potential for use in medicine, cosmetics, food, and pharmaceutical industries.
Article
Food Science & Technology
Maria Carolina Otalora, Andrea Wilches-Torres, Jovanny A. Gomez Castano
Summary: This study demonstrated the potential application of microencapsulated pink guava pulp as a natural colorant for dairy products, showing high content of lycopene, dietary fiber, and antioxidant activity, as well as stable color imparted to yogurt, contrasting with synthetic colorants.
Article
Food Science & Technology
Uzma Sadiq, Harsharn Gill, Jayani Chandrapala
Summary: The study found that the stability of extracted anthraquinones from whole-leaf Aloe vera gel is affected by different storage conditions, with aloin degrading rapidly at higher temperatures and pH levels, while aloe-emodin remains stable regardless of temperature and pH.
Article
Polymer Science
Petruta Preda, Ana-Maria Enciu, Cristiana Tanase, Maria Dudau, Lucian Albulescu, Monica-Elisabeta Maxim, Raluca Nicoleta Darie-Nita, Oana Brincoveanu, Marioara Avram
Summary: This study aimed to investigate and develop amorphous and crosslinked hydrogels based on natural compounds, such as sodium alginate, aloe vera gel powder, and chitosan, for tumor spheroid formation. The results showed that adding chitosan allowed the formation of spheroids at pH 5, while low viscosity and pH 12 aloe vera gels also promoted spheroid formation. Crosslinked hydrogel variants enhanced spheroid formation efficiency.
Article
Biochemistry & Molecular Biology
Rondinelli Donizetti Herculano, Thaina Oliveira dos Santos, Natan Roberto de Barros, Giovana Sant'Ana Pegorin Brasil, Mateus Scontri, Bruna Gregatti Carvalho, Marvin Mecwan, Neda Farhadi, Satoru Kawakita, Caio Humberto Perego, Flavio Alexandre Carvalho, Andre Gonzaga dos Santos, Nayrim Brizuela Guerra, Juliana Ferreira Floriano, Cassamo Ussemane Mussagy, Zuzana Tirpakova, Danial Khorsandi, Arne Peirsman, Huu Tuan Nguyen, Alejandro Gomez, Kalpana Mandal, Ricardo Jose de Mendonca, Bingbing Li, Mehmet Remzi Dokmeci, Vadim Jucaud
Summary: In this study, a novel alginate-latex dressing loaded with aloe vera was developed for the treatment of psoriasis. The dressing exhibited good biocompatibility and hemocompatibility, and released aloe vera with preserved antioxidant properties. The combined effect of aloe vera and latex in the dressing provides a simple and cost-effective approach for the management and treatment of psoriasis symptoms.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Leone Mazzeo, Irene Bavasso, Melissa Spallieri, Maria Paola Bracciale, Vincenzo Piemonte, Luca Di Palma
Summary: The adsorption properties of Aloe vera for Methylene Blue in water were studied after pre-treatment with different concentrations of ethanol. The results showed that pre-treatment enhanced the adsorption capacity of Aloe vera but reduced its affinity for Methylene Blue.
Article
Polymer Science
Muhammad Usman Munir, Daiva Mikucioniene, Haleema Khanzada, Muhammad Qamar Khan
Summary: Due to the current COVID-19 pandemic, there is a crucial need for the development of antimicrobial and antiviral personal protective equipment. In this research, electrospun nanofibers composite with polyvinyl alcohol, aloe vera, and zinc oxide nanoparticles were fabricated for medical device applications. The results showed that increasing the concentration of zinc oxide in the nanofibers was more effective in killing and inhibiting bacterial growth compared to increasing the concentration of aloe vera.
Article
Polymer Science
Maria Carolina Otalora, Andrea Wilches-Torres, Jovanny A. Gomez Castano
Summary: This work studied the use of mucilage extracted from the cladodes of Opuntia ficus-indica and aloe vera leaves as wall material in the microencapsulation of pink guava carotenoids using spray-drying. The results showed that the use of aloe vera mucilage increased the retention of beta-carotene, antioxidant capacity, and total carotenoid content of the microcapsules.
Review
Chemistry, Medicinal
Erica Espano, Jiyeon Kim, Jeong-Ki Kim
Summary: Plants, such as Aloe vera, contain compounds that can be used to combat viral diseases. Aloe vera extracts have been found to possess various pharmacological activities and compounds like aloe emodin and acemannan show promise as lead compounds for the treatment and prevention of viral diseases. Furthermore, these compounds can also be considered as adjuvants for viral vaccines. However, there are limitations to the clinical applications of Aloe compounds.
Article
Materials Science, Multidisciplinary
Keonhee Kim, Jae Gwang Lim, Su Man Hu, Yeonjoo Jeong, Jaewook Kim, Suyoun Lee, Joon Young Kwak, Jongkil Park, Gyu Weon Hwang, Kyeong-Seok Lee, Seongsik Park, Wook-Seong Lee, Byeong-Kwon Ju, Jong Keuk Park, Inho Kim
Summary: This study proposes a memristive device with a Cu/SiOx/implanted a-SiGex/p(++) c-Si structure, which plays a multifunctional role in device operation by limiting current overshoot, controlling heat generation, and preventing reaction between the active metal (Cu) and Si bottom electrode. The insertion of the a-SiGex layer enables the formation of multi-weak filaments and induces analog switching behaviors. Transmission electron microscopy observation shows that the insertion of the a-SiGex layer significantly suppresses the formation of copper silicide, and reliable set/reset operations are achieved. Memristive-neural network simulations demonstrate high learning accuracy and potential applications in future neuromorphic computing hardware.
NPG ASIA MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Uzma Sadiq, Harsharn Gill, Jayani Chandrapala, Fatima Shahid
Summary: Novel spray-dried casein micelles microcapsules were developed to extend the stability and bioavailability of anthraquinones extracted from Aloe vera. The encapsulation efficiency and structural changes within the micelles powders were evaluated. The results showed that the pH of the solution before drying and spray drying process had an impact on the encapsulation efficiency of anthraquinones.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Electrical & Electronic
Tanushree Ghosh, Suchita Kandpal, Devesh K. Pathak, Manushree Tanwar, Chanchal Rani, Anjali Chaudhary, Rajesh Kumar
Summary: The raw Aloe Vera flower extract displays memristive behavior with high conductivity, capable of switching between different memory states with impressive On/Off ratio and cyclability. This could pave the way for designing solid-state herbal memristors using active molecules present in Aloe Vera flowers.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Textiles
Vijayan Rajendran, Krishnamoorthy Arunagiri, Palanikumar Kayaroganam
Summary: The research focused on replacing synthetic fiber with natural fiber due to their significant advantages in materials. By hybridizing Roselle and Aloe vera fibers to create composite materials, it was found that Roselle-based hybrid composites exhibited better strength compared to other laminates. Analysis conducted through morphological studies and SEM provided a deeper understanding of the performance of composite materials.
JOURNAL OF NATURAL FIBERS
(2022)
Review
Materials Science, Textiles
Lebo Maduna, Asis Patnaik
Summary: Natural wound dressings extracted from Aloe vera leaves are recognized for their ability to speed up wound healing and their non-toxicity. The treated dressings remove moisture and allow gas exchange while suppressing microbial growth. Aloe vera can be applied directly to fabric or electrospun into nanoparticles. Chemical antimicrobial agents are still used due to the limited effectiveness of natural agents against high concentrations of microorganisms. However, natural fabrics treated with Aloe vera can be an alternative for chemical agents, as they prevent microbial growth and promote wound healing without activating the immune response.
JOURNAL OF NATURAL FIBERS
(2023)
Review
Optics
Jorge Parra, Irene Olivares, Antoine Brimont, Pablo Sanchis
Summary: The article discusses the current developments in achieving nonvolatile switching in silicon photonic waveguide devices, either through device engineering or hybrid integration with unique optical materials. Several approaches with high potential for evolving towards nonvolatile behavior with enhanced performance are being explored, although many development steps are still necessary to ensure reliable devices.
LASER & PHOTONICS REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Michael Raj Marks, Kuan Yew Cheong, Zainuriah Hassan
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Electrical & Electronic
Z. X. Lim, I. A. Tayeb, Z. A. A. Hamid, M. F. Ain, A. M. Hashim, J. M. Abdullah, F. Zhao, K. Y. Cheong
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2019)
Article
Materials Science, Multidisciplinary
Thanh Tam Tran, Zuratul Ain Abdul Hamid, Ngoc Thien Lai, Kuan Yew Cheong, Mitsugu Todo
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Michael Raj Marks, Foo Khong Yong, Kuan Yew Cheong, Zainuriah Hassan
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2020)
Article
Engineering, Electrical & Electronic
Binghao Wang, Kuan Yew Cheong, Chih-Fang Huang, Feng Zhao
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2020)
Article
Materials Science, Multidisciplinary
Aleksey A. Sivkov, Yuan Xing, Kuan Yew Cheong, Xiangqun Zeng, Feng Zhao
Article
Engineering, Manufacturing
Michael Raj Marks, Kuan Yew Cheong, Zainuriah Hassan
Summary: This study systematically investigated the impact of femtosecond laser dicing on the fracture strength and sidewall microstructure of 20 μm Si dies with 0-30 μm Cu backside layer. The results showed that Si dies with Cu backside layer had higher backside characteristic fracture strength but lower frontside characteristic fracture strength compared to those without Cu backside layer. Fractographic and microstructural analyses were conducted to understand the fracture initiation behavior and effects on fracture strength. Recommendations for improving the fracture strengths were made based on observed microstructural features.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Electrical & Electronic
Aleksey A. Sivkov, Yuan Xing, Zoe Minden, Zhigang Xiao, Kuan Yew Cheong, Feng Zhao
Summary: The resistive switching properties of nanoscale ZrO2 thin films deposited by PE-ALD were investigated, demonstrating bipolar resistive switching characteristics with promising parameters for memory applications. The study also presented a SPICE model to simulate the device behavior, showing good agreement with experimental data and confirming the potential of PE-ALD ZrO2 for non-volatile resistive random access memories.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Nurul Hidayah Mohamad Idris, Jayalakshmi Rajakumar, Kuan Yew Cheong, Brendan J. Kennedy, Teruhisa Ohno, Akira Yamakata, Hooi Ling Lee
Summary: The fabrication of a TiO2/PVA/cork floating photocatalyst resulted in the efficient degradation of methylene blue, with superior performance under visible light irradiation. The presence of TiO2 nanoparticles on the cork surface was confirmed through various analyses, and the photocatalyst demonstrated good reusability even after multiple cycles. The photocatalytic activity was mainly controlled by superoxide radical (O-center dot(2)-) reactive oxygen species, highlighting its potential application in wastewater treatment.
Article
Chemistry, Physical
Lai Fan Choong, Kuan Yew Cheong, Sivakumar Ramakrishnan, Ahmad Faiz Roslan
Summary: The strong adhesion between epoxy and silicone is crucial for optoelectronic packaging and can be enhanced by microwave plasma treatment. Epoxy treated with 300 W plasma exhibited the highest shear strength, with factors contributing to the improvement identified.
APPLIED SURFACE SCIENCE
(2021)
Review
Engineering, Multidisciplinary
Michael Raj Marks, Kuan Yew Cheong, Zainuriah Hassan
Summary: This article reviews the physics of laser-material interaction in Si wafer dicing, discussing the effects of laser settings, dicing parameters, and material factors on ablation rate and quality, as well as approaches to improve cutting methods.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Kuan Yew Cheong, Ilias Ait Tayeb, Feng Zhao, Jafri Malin Abdullah
Summary: Bio-organic material, a sustainable and bio-resorbable material, is used as an active thin film in producing resistive switching random access memory (RRAM). The memory characteristics of this nonvolatile memory are significantly affected by the resistive-switching mechanism. Studies have identified three types of mechanisms in governing the operation of bio-organic-based RRAM: electronic, electrochemical, and thermo-chemical.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Ilias A. Tayeb, Feng Zhao, Jafri M. Abdullah, Kuan Y. Cheong
Summary: The study demonstrates the potential of polymannose as a candidate material for environmentally friendly resistive-switching random access memory, showing competitive resistive switching characteristics with a READ window of 2.2 V. The optimal drying time of 7 hours provided high ON/OFF ratio and acceptable endurance cycles.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Proceedings Paper
Chemistry, Multidisciplinary
T. T. Tam, M. Todo, K. Y. Cheong, Z. A. Abdul Hamid
3RD INTERNATIONAL POSTGRADUATE CONFERENCE ON MATERIALS, MINERALS & POLYMER (MAMIP) 2019
(2020)
Article
Materials Science, Multidisciplinary
Z. X. Lim, I. A. Tayeb, Z. A. A. Hamid, M. F. Ain, A. M. Hashim, J. M. Abdullah, A. A. Sivkov, F. Zhao, K. Y. Cheong
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)