Article
Materials Science, Ceramics
Leodoro P. dos Santos Filho, de F. P. Maria P. Nascimento, Liziane Marcal, Katia J. Ciuffi, Marcio L. A. e Silva, Eduardo J. Nassar, Lucas A. Rocha
Summary: The sol-gel process is an interesting strategy to obtain hybrid materials, with mesoporous silica showing large specific area and pore volume, and demonstrating efficient antimicrobial properties. Mesoporous silica matrixes prepared via the sol-gel process using surfactants and copolymers as structure-driving agents showed the most significant effects in the study.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
J. J. Mikolei, D. Richter, R. Pardehkhorram, C. Helbrecht, S. Schabel, T. Meckel, M. Biesalski, M. Ceolin, A. Andrieu-Brunsen
Summary: Introduces the importance of mesopores in paper, which not only increase the specific surface area, but also have specific properties such as capillary fluid transport and ion specific pore accessibility. Investigates mesopore formation in paper using sol-gel chemistry and evaporation induced self-assembly, and discusses the influence of solvent evaporation rate and capillary fluid velocity on mesopore formation.
Article
Polymer Science
Dan Eduard Mihaiescu, Daniela Istrati, Alina Morosan, Maria Stanca, Bogdan Purcareanu, Rodica Cristescu, Bogdan Stefan Vasile, Roxana Doina Trusca
Summary: This research focuses on the study of cefotaxime absorption and desorption from different functionalized mesoporous silica supports to obtain new materials with sustained release properties. The MCM-41-type nanostructured mesoporous silica support was synthesized and characterized, showing good micro-structured homogeneity, high surface area, and high silanolic activity. Functionalization of the support was conducted to effectively link the cefotaxime compound. The release experiments revealed significant improved release capacity in the functionalized mesoporous silica support.
Article
Biochemistry & Molecular Biology
Xingzhong Guo, Zixiao Li, Wei Lei, Ronghua Ding, Yun Zhang, Hui Yang
Summary: The study focused on the preparation of mesoporous methylsilsesquioxane aerogels using microwave heating technology. It was found that low-power microwave heating accelerates gelation transition, while high-power microwave heating allows for the preparation of aerogels with high specific surface area and thermal stability.
Article
Materials Science, Ceramics
Qian Wu, Guo Feng, Feng Jiang, Lifeng Miao, Weihui Jiang, Jian Liang, Jianmin Liu, Jingang Tan, Xiaojun Zhang, Xinbin Lao
Summary: A petal-like MgAl2O4 spinel was successfully prepared through a novel sol-gel method with inorganic salt assistance, showing high uniformity in morphology and promising absorption capacity for anionic dyes like CR. Control of factors such as salt type and heat treatment temperature allows for effective regulation of the MgAl2O4 spinel's structure and morphology, demonstrating its potential for environmental remediation applications.
CERAMICS INTERNATIONAL
(2022)
Article
Biochemistry & Molecular Biology
Atheer Al Khudhair, Karim Bouchmella, Pierre Hubert Mutin, Vasile Hulea, Olinda Gimello, Ahmad Mehdi
Summary: The development of green and sustainable materials for use as heterogeneous catalysts is an emerging field of research in chemistry. This study prepared SiO2-Al2O3 mixed oxide catalysts with different Si/Al ratios using different methods and characterized their properties. The results showed that the Si/Al ratio of the catalysts influenced the texture and acidity of the mesoporous materials.
Article
Materials Science, Multidisciplinary
Raju Kumar Sharma, Gobinda Dey, Pritam Banerjee, Jyoti Prakash Maity, Chung-Ming Lu, Shau-Chun Wang, Yi-Hsun Huang, Pin-Yun Lin, Yung-Ping Chen, Chien-Yen Chen
Summary: This study investigated the synthesis of mesoporous silica nanoparticles using four different surfactants. The outcomes showed that Tween-80 and biosurfactant produced interesting results compared to CTAB and SDS-mediated silica nanoparticles.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Airi Tago, Masato Yanase, Noriko Yamauchi, Kouichi Nakashima, Daisuke Nagao, Yoshio Kobayashi
Summary: A simple method was developed to suppress the oxidation and aggregation of metallic particles by coating metallic nickel particles with silica shells. The coated particles exhibited controlled oxidation and aggregation behavior, as well as paramagnetic properties after annealing in air.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Ceramics
Zhonghao Li, Runxun Liao, Runping Jia, Yufeng Liu, Xiaowei Xu, Jun Shen, Xiaodong Wang, Guangming Wu, Qingsheng Wu, Jichao Shi
Summary: Silica aerogels are promising materials with outstanding properties, but their application is limited by high cost and complex production processes. This study introduces a novel combustion drying method (CDM) for the synthesis of superhydrophobic silica aerogels, which offers significant advantages in terms of efficiency and cost. The proposed mechanism based on organic solvents combustion could be meaningful for future aerogel material design and production.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Matjaz Kristl, Irena Ban, Saso Gyergyek, Uros Maver, Janja Stergar
Summary: The use of magnetic nanoparticles in biomedical applications, such as magnetic resonance imaging, drug delivery, and magnetic hyperthermia, is a topic of great interest. Nickel-copper nanoparticles with the formula Ni(x)Cu(1-x) are particularly attractive due to their simple synthesis, high magnetization, biocompatibility, and therapeutic Curie temperature (T-C). Coating the nanoparticles with silica improves their stability, biocompatibility, and allows for further functionalization or drug incorporation. In this study, Ni(67.5)Cu(32.5) nanoparticles were prepared using the sol-gel method and characterized for their potential in magnetic hyperthermia.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zhenqian Zhang, Yongzhou Lin, Fang Liu
Summary: The hybrid nanocrystals of cadmium sulfide (CdS) and bismuth tungstate (Bi2WO6) were successfully prepared in nanoreactors, showing excellent photocatalytic performance with superoxide ions and holes identified as the active species during the photocatalytic process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Patrick Ehi Imoisili, Emeka Charles Nwanna, Tien-Chien Jen
Summary: This study successfully prepares silica nanoparticles (SNPs) from South African fly ash using a sol-gel hydrothermal approach, providing a new idea for sourcing silica. The SNPs produced have an average diameter of about 60 nanometers according to scanning electron microscope and transition electron microscope studies. In wastewater treatment, SNPs demonstrate the potential to remove Cd2+.
Article
Materials Science, Multidisciplinary
A. Bordoni, M. Lombardo, A. Wolosiuk
Summary: In this study, the use of microwave radiation as a postsynthesis treatment for expanding the pore size of non-calcined SiO2-based mesoporous materials was analyzed. Compared to traditional hydrothermal treatments, microwave irradiation significantly reduces the processing time and is compatible with various surfactant pore templates. This approach allows for easy postprocessing of non-calcined templated siliceous materials and customization of their final pore dimensions.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Polymer Science
Quoc-Thai Pham, Zong-Han Yao, Yu-Ting Wu, Chia-Hao Hsu, Chorng-Shyan Chern
Summary: Raspberry-like hollow hybrid nanoparticles were prepared through simultaneous miniemulsion sol-gel reaction/free radical polymerization. MEMO played a crucial role in morphological control, while ST concentration affected particle diameter and specific surface area.
Article
Chemistry, Physical
Adil Alshoaibi, Shumaila Islam
Summary: Sol-gel-based titania nanoparticles, Silica-titania nanocomposite, and zinc supported silica-titania nanocomposites were synthesized at low temperature. The study showed that zinc nanoparticles were homogeneously distributed in the silica-titania nanocomposite, and the doping of zinc enhanced the photocatalytic activity of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Correction
Chemistry, Multidisciplinary
Wenxin Wei, Francesca Mazzotta, Ingo Lieberwirth, Katharina Landfester, Calum T. J. Ferguson, Kai A. I. Zhang
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Julian Heuer, Thomas Kuckhoff, Rong Li, Katharina Landfester, Calum T. J. Ferguson
Summary: The production of photocatalytic self-assembled amphiphilic polymers enables selective control over reactions based on the substrate's physical properties. By polymerizing benzothiadiazole-based photocatalysts into hydrophilic or hydrophobic compartments, we achieved stark differences in reactivity for polar substrates but similar performance for hydrophobic substrates. Additionally, the use of secondary swelling solvents led to a significant increase in conversion for a radical carbon-carbon coupling reaction.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Cyrine Ayed, Jie Yin, Katharina Landfester, Kai A. I. Zhang
Summary: Using photocatalytic oxidation to convert basic chemicals into high value compounds in environmentally benign reaction media is a current focus in catalytic research. The challenge of gaining controllability over product formation selectivity was addressed by designing covalent triazine frameworks as recyclable photocatalysts. Controlled selectivity was achieved by activating or deactivating specific photogenerated oxygen species. This study demonstrates a promising approach for achieving switchable product formation selectivity for challenging oxidation reactions in pure water.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Shoupeng Cao, Tsvetomir Ivanov, Marina de Souza Melchiors, Katharina Landfester, Lucas Caire da Silva
Summary: The article discusses the importance of polymersome-based biomimetic nanoreactors (PBNs) in nanomedicine and cell mimicry. It highlights the state of the art in functional polymersomes as biomimetic nanoreactors with membrane-controlled transport.
Correction
Chemistry, Multidisciplinary
Wenxin Wei, Francesca Mazzotta, Ingo Lieberwirth, Katharina Landfester, Calum T. J. Ferguson, Kai A. I. Zhang
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Susanne Sihler, Markus Kraemer, Felicitas Schmitt, Patrizia Favella, Laura Muetzel, Jennifer Baatz, Frank Rosenau, Ulrich Ziener
Summary: BSA nanogels are efficiently prepared from inverse nanoemulsions using a reproducible process. The nanoreactors in the nanoemulsions allow high protein concentrations in the system. The nanogels can be loaded with various cargos and used as carriers for staining and transfection of cells.
Article
Pharmacology & Pharmacy
Loris Busch, Anna Maria Hanuschik, Yuri Avlasevich, Katrin Darm, Elisa F. F. Hochheiser, Christian Kohler, Evgeny A. A. Idelevich, Karsten Becker, Peter Rotsch, Katharina Landfester, Maxim E. E. Darvin, Martina C. C. Meinke, Cornelia M. M. Keck, Axel Kramer, Paula Zwicker
Summary: Hair follicles are important drug delivery targets for skin antisepsis due to their high concentration of skin microbiome. Nanoparticles can penetrate deeply into hair follicles and can be triggered to release drugs through various mechanisms. The study introduces UV-responsive nanocapsules containing hydroxyethyl starch, which demonstrated efficient release of ethanol and a strong reduction in microbial load on porcine ear skin. The findings suggest the potential for advanced skin antisepsis using UVA-responsive nanocapsules.
Article
Materials Science, Multidisciplinary
Lutong Zhao, Xinlei Wu, Xiangkai Hu, Sijia Zheng, Zhihai Cao
Summary: Phase change microcapsules (PCMCs) with paraffin as the core material were synthesized through in situ polymerization. The melamine-formaldehyde (MF) polymer shell of PCMCs was modified with boron nitride/graphene oxide composite sheets (BN/GO CSs) to enhance the thermal conductivity. The optimized CPCMCs exhibited a significantly increased thermal conductivity of about 190% compared to pure paraffin. The incorporation of BN/GO CSs had no significant influence on the encapsulation process and allowed for high encapsulation rate (>93%) and high phase change enthalpy (approximately 200 J center dot g-1). This research provides valuable insights into incorporating multiple fillers in PCMCs and demonstrates the synergistic effect of BN/GO CSs in improving thermal conductivity without compromising heat storage capacity.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Tsvetomir Ivanov, Shoupeng Cao, Nitin Bohra, Marina de Souza Melchiors, Lucas Caire da Silva, Katharina Landfester
Summary: We have developed a fully polymeric microreactor with a coacervate-in-vesicle architecture that exhibits an adaptive response to pH. The microreactor allows for the dynamic modulation of internal subcompartments, resulting in the sequestration and localization of enzymes and reaction products driven by environmental cues.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Sijia Zheng, Haiyan Xue, Jun Yao, Yang Chen, Michael A. Brook, Muhammad Ebad Noman, Zhihai Cao
Summary: The development of high-performance thermally conductive interface materials is crucial for addressing the heat dispersion problem in modern microelectronics. However, existing methods have limitations in terms of physical traits and processability. In this study, we propose a novel approach using malleable silicone matrices based on α-lipoic acid cross-linker to create highly efficient thermal conductive composites. These composites have a 3D interconnecting, thermally conductive network and show great potential in advanced electronics, as demonstrated by applications in LEDs and CPUs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ran Wang, Yingjie Yu, Meiyu Gai, Ana Mateos-Maroto, Svenja Morsbach, Xiang Xia, Maomao He, Jiangli Fan, Xiaojun Peng, Katharina Landfester, Shuai Jiang, Wen Sun
Summary: Enzymatic reactions can effectively inhibit tumor growth by consuming tumor nutrients and producing cytotoxic species. Liposomal nanoreactors that perform enzymatic cascade reactions have been developed, increasing the overall efficiency of the reaction. This biomimetic approach provides a promising direction for developing catalytic nanomedicines in antitumor therapy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Felix D. Goll, Andreas Schelhorn, Dziugas Litvinas, Francisco Tenopala-Carmona, Lev Kazak, Fedor Jelezko, Christoph Lambert, Malte C. Gather, Alexander J. C. Kuehne, Ulrich Ziener
Summary: This study presents a new carbazole-substituted bisterpyridine with pronounced delayed fluorescence. Various photophysical characterizations, OLED characteristics, temperature-dependent NMR spectroscopy, and DFT calculations suggest that the delayed emission is caused by rotational vibrational modes, rather than triplet states. These results have general applicability in the field of organic light emitting materials.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Mareike F. S. Deuker, Volker Mailaender, Svenja Morsbach, Katharina Landfester
Summary: Poly(ethylene glycol) (PEG) is commonly used to reduce unspecific protein adsorption and prolong nanocarrier circulation time, but the presence of anti-PEG antibodies in the bloodstream can counteract its stealth effect. This study found a high concentration and prevalence of anti-PEG antibodies in the German population, which led to higher uptake in macrophages and accelerated blood clearance of PEGylated nanocarriers.
NANOSCALE HORIZONS
(2023)
Article
Cell Biology
Laura Dietz, Jennifer Oberlaender, Ana Mateos-Maroto, Jenny Schunke, Michael Fichter, Eva-Maria Kraemer-Albers, Katharina Landfester, Volker Mailaender
Summary: This study analyzed the protein composition of extracellular vesicles (EVs) and the protein corona around EVs in human blood plasma using a proteomic approach. The influence of the protein corona on the uptake of EVs by human monocytes was then compared with the uptake of engineered liposomes. The results showed that the presence of a protein corona increased the uptake of EVs in human monocytes, indicating a clear difference between EVs and liposomes as nanocarriers.
JOURNAL OF EXTRACELLULAR VESICLES
(2023)
Article
Chemistry, Multidisciplinary
Tsvetomir Ivanov, Shoupeng Cao, Thao P. Doan-Nguyen, Heloisa Bremm Madalosso, Lucas Caire da Silva, Katharina Landfester
Summary: There is an increasing interest in multi-compartment systems that mimic the structure and function of biological cells. Droplet-based microfluidics (DBM) has emerged as a powerful technique for creating cell-like systems with multi-compartment architectures and biomimetic functionality. DBM has proven to be a reliable method for generating populations of cell-mimics with a compartment-in-compartment structure, some of which have adaptable properties that resemble the dynamic properties of natural cells. This review highlights the progress made in the construction of hierarchical cell-mimics using DBM methods.