Article
Chemistry, Multidisciplinary
O. Norvilaite, C. Lindsay, P. Taylor, S. P. Armes
Summary: A series of silica-coated micrometer-sized poly(methyl methacrylate) latex particles is prepared using a Sto''ber silica deposition protocol. Physical adsorption of chitosan onto the latex particles minimizes secondary nucleation and promotes the formation of silica shells. Thermogravimetry studies indicate that silica formation is complete within a few hours regardless of the presence or absence of chitosan.
Article
Chemistry, Multidisciplinary
Chang Li, Yafeng Yu, Huizeng Li, Jingxuan Tian, Wei Guo, Yanting Shen, Huanqing Cui, Yi Pan, Yanlin Song, Ho Cheung Shum
Summary: In this study, dual color domes with unique structural colors were successfully constructed using a one-pot strategy based on phase-separation-assisted nonuniform self-assembly. The colors of the domes were programmable by regulating the assembly conditions, and encrypted patterns with high content volume were designed, showing promising applications in information delivery.
Article
Chemistry, Multidisciplinary
Chenyang Wang, Shujuan Ma, Yinmao Wei, Junjie Ou
Summary: The study focuses on the use of cationic surfactant hexadecyl trimethyl ammonium bromide and co-surfactant octadecylamine to improve the stability of Pickering emulsions and arrange micron-sized silica particles at the toluene-water interface through electrostatic interaction. Organosilane reagents are also added to construct asymmetric hydrophilic or hydrophobic mesoporous onto the silica particles surface. The cation surfactant-assisted Pickering emulsion method is simple and effective, making it applicable for the synthesis of dual Janus silica particles for specific applications.
Article
Chemistry, Multidisciplinary
Shian Fei, Yaheng Zhang, Jie Zhang, Zhiyong Tang, Qing Wu
Summary: This study presents a robust and scalable method for synthesizing continuously the silica microspheres via the Stober method, achieving satisfactory morphology and mono-dispersity. The addition of surfactant improved the reliability and efficiency of the synthesis process, enabling the production of microspheres with diameters over 1 μm within a shorter residence time. Increasing the gas/liquid ratio in segmented flow further improved the mono-dispersity of silica microspheres through intensified mixing in liquid segments.
JOURNAL OF FLOW CHEMISTRY
(2021)
Article
Physics, Applied
Hao Zhang, Jishen Zhang, Shengduo Xu, Dingxin Liu, Li Guo, Hua Li
Summary: This study proposed a 7 μm micro-plasma jet device and evaluated its anticancer effects on three-dimensional bladder micro-tumor spheroids (T24 cell line) constructed in vitro. The experimental results showed that the device can effectively inactivate micro-tumors with diameters ranging from 50 to 300 μm, providing a new approach for precise micro-tumor therapy in clinical medicine.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Biotechnology & Applied Microbiology
Baranya Murugan, Uma Maheswari Krishnan
Summary: Thiol-functionalized small mesoporous silica nanocarriers showed greater chemoresponsive release and cytotoxicity to cancer cells, while large carriers mainly altered membrane-associated pathways.
Article
Chemistry, Physical
Brunna Mota Ferrairo, Victor Mosquim, Lucas Jose de Azevedo-Silva, Luara Aline Pires, David Santos Souza Padovini, Aroldo Geraldo Magdalena, Carlos Alberto Fortulan, Paulo Noronha Lisboa-Filho, Jose Henrique Rubo, Ana Flavia Sanches Borges
Summary: The purpose of this study was to produce an experimental dense silica-based bioceramic composite added with nano-sized hydroxyapatite (HA) for biomedical application. The firing temperature and the amount of binder, polyvinyl butyral (PVB), were varied to characterize the material physicochemically and microstructurally. The results showed that sintering the sample at 1200℃ resulted in enhanced chemical bonds without degradation of HA, and the addition of PVB improved compaction and reduced the presence of pores or cracks.
Article
Biochemical Research Methods
Jiangqi Bai, Qiuyan Zhu, Changwei Tang, Jiawei Liu, Yukun Yi, Quan Bai
Summary: This paper presents an effective and facile approach to prepare monodisperse porous silica microspheres (MPSMs) with controllable particle size and pore size for high-performance liquid chromatography (HPLC) by using porous polymer microspheres as templates. The obtained MPSMs retained the original size of the polymer templating particles and showed tunable pore sizes. The prepared MPSMs were further modified and demonstrated promising potential applicability in HPLC.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Engineering, Chemical
Tae Hyoung Kim, Ki Chang Song
Summary: Increasing the size and content of silica particles leads to an increase in haze values but a decrease in visible light transmittance in the coating films; stirring time has little effect on haze values and transmittance; increasing the mixing ratio of large-sized silica particles results in higher haze values but lower visible light transmittance.
KOREAN CHEMICAL ENGINEERING RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Jun Kanazawa, Tsuyoshi Kanamori, Masaki Sato, Haruyuki Ishii, Mikio Konno, Daisuke Nagao
JOURNAL OF NANOPARTICLE RESEARCH
(2018)
Article
Materials Science, Ceramics
Haruyuki Ishii, Mitsunobu Nara, Yuri Hashimoto, Arata Kanno, Shunho Ishikawa, Daisuke Nagao, Mikio Konno
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2018)
Article
Materials Science, Multidisciplinary
Haruyuki Ishii, Yohei Ishikawa, Daisuke Nagao, Mikio Konno
Article
Chemistry, Physical
Kanako Watanabe, Yui Tajima, Takuya Shimura, Haruyuki Ishii, Daisuke Nagao
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Chemistry, Physical
Natsuki Kohama, Chika Suwabe, Haruyuki Ishii, Kumiko Hayashi, Daisuke Nagao
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2019)
Article
Chemistry, Multidisciplinary
Michinari Kohri, Yuki Tamai, Ayaka Kawamura, Keita Jido, Mikiya Yamamoto, Tatsuo Taniguchi, Keiki Kishikawa, Syuji Fujii, Naozumi Teramoto, Haruyuki Ishii, Daisuke Nagao
Article
Engineering, Chemical
Ayumi Yahata, Haruyuki Ishii, Kosuke Nakamura, Kanako Watanabe, Daisuke Nagao
ADVANCED POWDER TECHNOLOGY
(2019)
Article
Chemistry, Physical
Kanako Watanabe, Tom A. J. Welling, Sina Sadighikia, Haruyuki Ishii, Arnout Imhof, Marijn A. van Huis, Alfons van Blaaderen, Daisuke Nagao
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2020)
Article
Chemistry, Physical
Tom A. J. Welling, Sina Sadighikia, Kanako Watanabe, Albert Grau-Carbonell, Maarten Bransen, Daisuke Nagao, Alfons van Blaaderen, Marijn A. van Huis
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2020)
Article
Chemistry, Physical
Hikaru Namigata, Kanako Watanabe, Saya Okubo, Daisuke Nagao
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Chemistry, Physical
Hikaru Namigata, Kanako Watanabe, Saya Okubo, Masashi Hasegawa, Keishi Suga, Daisuke Nagao
Summary: The study explores the immobilization of photocatalytic particles in a continuous flowing system using double inverse-opal (DIO) structures. Increasing macropore size enhances the decomposition rate of organic dye due to high diffusion rate, but excessive increase can lower the rate due to light attenuation. These novel immobilized photocatalytic DIO-structured particles can be used by tuning particle size, macropore size, and DIO thickness.
Article
Chemistry, Multidisciplinary
Kanako Watanabe, Takuya Shimura, Akira Nagasawa, Daisuke Nagao
Summary: The multipoint lock-and-key particle assembly methodology creates rigid colloidal molecules mimicking rigid polymers by connecting lock particles with anisotropic dents to rod-shaped key particles in the presence of depletants. This assembly technique lowers particle diffusion significantly, suggesting its potential as a promising colloidal model for studying atomic-scale polymers associated with micro Brownian motion.
Article
Chemistry, Multidisciplinary
Kota Fujimoto, Shunho Ishikawa, Kanako Watanabe, Haruyuki Ishii, Keishi Suga, Daisuke Nagao
Summary: The study investigated the mechanism of forming mesoporous silica shells on nonporous spherical silica cores, and found that using sodium bromide as an electrolyte can suppress the generation of secondary particles to form a uniform mesoporous shell. The results suggest that controlling the ionic strength of the silica coating is an effective approach to suppress the generation of secondary particles, which is important for designing mesoporous shells suitable for high-performance liquid chromatography column packing materials.
Article
Nanoscience & Nanotechnology
Ryota Kameda, Taisei Suzuki, Ikumi Kato, Keishi Suga, Kanako Watanabe, Kimiko Nagino, Kumiko Hayashi, Satoshi Arai, Daisuke Nagao
Summary: In recent years, many photothermal materials have been developed for efficient photothermal therapy. However, upsizing these materials for better performance hampers cellular uptake. To overcome this, an active control system was proposed to manipulate the assembly of magnetic composite particles (MCPs) at the cellular level. Different-sized MCPs were synthesized and their surfaces were modified, showing improved dispersibility and cellular uptake. The assembly and redispersal of MCPs were controlled using a direct current magnetic field (DCMF), leading to improved cytotoxicity under near-infrared laser irradiation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Keishi Suga, Makina Murakami, Shota Nakayama, Kanako Watanabe, Sayuri Yamada, Toshikazu Tsuji, Daisuke Nagao
Summary: Polymer nanoparticles, specifically cationic polystyrene (PSt) nanoparticles synthesized via soap-free emulsion polymerization, were investigated for their surface properties and antibacterial activity. It was found that PSt nanoparticles with larger affinity values (K) exhibited antibacterial activity against Staphylococcus epidermidis. These nanoparticles disrupted the bilayer structure of model membranes, indicating their potential as contact-killing antibacterial agents.
ACS APPLIED BIO MATERIALS
(2022)
