Article
Materials Science, Multidisciplinary
E. A. Dawi, E. Mustafa, T. Siahaan
Summary: This study investigates the anisotropic deformation of colloidal particles under ion irradiation and finds that the ion beam irradiation leads to significant anisotropic deformation and a shift in surface plasmon resonance.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Chemical
Tsaone Gosiamemang, Jerry Y. Y. Heng
Summary: Sodium hydroxide (NaOH) plays an important role in the nucleation of silica nano-particles (SNPs), but little is known about the physicochemical properties and surface modification of the resulting SNPs. By treating SNPs with hydrochloric acid, the sodium ions can be removed and the thermal stability of SNPs can be significantly improved. The surface chemistry of SNPs can be easily modified with octyltrimethoxysilane and octadecyltrimethoxysilane, resulting in super-hydrophobicity and reduced moisture sorption.
Article
Chemistry, Physical
Nicolas Debons, Dounia Dems, Christophe Methivier, Christophe Calers, Antoine Miche, Thibaud Coradin, Carole Aime
Summary: Functionalization of nanomaterial surfaces is crucial for improving stability, tuning reactivity, and introducing specific properties. Mapping functional groups at nanometer scale is challenging, especially for organic groups and non-planar objects like nanoparticles. A strategy using chemically-modified gold colloids to map amine groups on silica particle surfaces is presented, showing correlation between spatial distribution of gold colloids and chemical state of silica particles as revealed by X-ray photoelectron spectroscopy. The strategy's potential for mapping organic groups at nanomaterial interfaces and its implications for biofunctional nano-objects are discussed.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Yu-Jen Hsu, Hsing-Yu Wu, Wei-Che Chang, Yung-Tang Nien
Summary: Machining fused silica surfaces using continuous-wave CO2 laser beams resulted in U-shaped grooves with porous microstructures in the center and uneven solidified films at the edges. XPS results indicated a higher oxidation state for Si4+ and the presence of absorbed oxygen or hydroxides on nanostructured silica after CO2 laser machining.
Article
Biochemistry & Molecular Biology
Magdalena Laskowska, Agnieszka Karczmarska, Mateusz Schabikowski, Michal Adamek, Alexey Maximenko, Katarzyna Pawlik, Oliwia Kowalska, Zbigniew Olejniczak, Lukasz Laskowski
Summary: The effects of synthesis conditions on the size and structure of synthetic opals were investigated using the Stober process. The internal hierarchical structure of the resulting silica particles was confirmed, and the study showed no dependence on the concentration of reagents and the size of the particles. This research is significant for the synthesis and application of synthetic opals.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Multidisciplinary Sciences
Dan Cheng, Jun Zhang, Jianye Fu, Hao Song, Chengzhong Yu
Summary: This study presents a hierarchical spatial assembly strategy for fabricating silica-polymer composites and obtaining silica and carbon nanoparticles with unprecedented structures. Through a deeper understanding of the hierarchical spatial assembly mechanism, precise regulation of the structures of nanoparticles is achieved.
Article
Pharmacology & Pharmacy
Snehashis Nandi, Luis Padrela, Lidia Tajber, Alain Collas
Summary: This study demonstrates the operational feasibility of generating and stabilizing long-acting injectable suspensions of a practically insoluble drug, itraconazole, using continuous liquid antisolvent crystallization and downstream processing. The optimized microchannel reactor-based bottom-up crystallization setup and selection of suitable solvent and stabilizer resulted in a stable suspension with desired particle size distribution and solid concentration.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Multidisciplinary
Marius Schoettle, Tobias Lauster, Lukas J. Roemling, Nicolas Vogel, Markus Retsch
Summary: Researchers have developed a general synthetic approach to creating continuous size gradient colloidal ensembles. By synthesizing a dispersion with a specifically designed gradual particle size distribution and then allowing self-assembly, they obtained a photonic colloidal glass with a continuous size gradient. Characterization methods demonstrated the potential of this mesostructure, including vivid structural colors and superior light scattering across the gradient.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Jacek J. Walkowiak, Casper van Duijnhoven, Pia Boeschen, Nadja A. Wolter, Joanna Michalska-Walkowiak, Martin Dulle, Andrij Pich
Summary: Raspberry-like poly(oligoethylene methacrylate-b-N-vinylcaprolactam)/polystyrene (POEGMA-b-PVCL/PS) patchy particles (PPs) and complex colloidal particle clusters (CCPCs) were successfully fabricated using a two-step or one-step cascade flow process. The internal structure and surface morphology of the particles were studied under different polymerization conditions. The use of a tubular flow reactor for photo-initiated reversible addition-fragmentation transfer precipitation polymerization (Photo-RPP) provided advantages over heat dissipation and homogeneous light distribution.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Gozde Gecim, Sinan Donmez, Ertugrul Erkoc
Summary: This study successfully precipitated calcium deficient hydroxyapatite nanoparticles using only dilute solutions of calcium hydroxide and phosphoric acid without pH adjustment or additional chemicals. By changing the production system and hydrodynamics, pure phase hydroxyapatite nanoparticles in desired morphologies were produced, demonstrating the possibility of controlling particle characteristics without the need for additives. The vortex reactor (VR) and semi-batch reactor (SBR) produced rod-like and spherical particles, respectively, with different crystallite sizes.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Wenjie Zhou, Yein Lim, Haixin Lin, Sangmin Lee, Yuanwei Li, Ziyin Huang, Jingshan S. Du, Byeongdu Lee, Shunzhi Wang, Ana Sanchez-Iglesias, Marek Grzelczak, Luis M. Liz-Marzan, Sharon C. Glotzer, Chad A. Mirkin
Summary: This study successfully assembled colloidal quasicrystals by exploiting the geometry of nanoscale decahedra and the programmable bonding characteristics of DNA immobilized on their facets. The process is enthalpy-driven, works over a range of particle sizes and DNA lengths, and is made possible by the energetic preference of the system to maximize DNA duplex formation and favor facet alignment. The resulting colloidal quasicrystals exhibit specific structures with stacking disorder providing thermodynamic stability.
Article
Chemistry, Multidisciplinary
Cheng-Kun Wu, Jin-Zheng Wang, Cheng-Hai Yan, Can-Yang Shi, Huan Chen, Sheng Sheng, Shuai You, Fu-An Wu, Jun Wang
Summary: A novel strategy combining magnetic response immobilized lipase and continuous-flow microchannel reactor was proposed to modify silkworm pupae oil, resulting in improved absorption of unsaturated fatty acids and enhanced nutritional value of the oil.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Engineering, Chemical
Nasim Barati, Maen M. Husein, Jalel Azaiez
Summary: This study utilized in-situ generated iron oxide nanoparticles to alleviate membrane fouling caused by the combined effect of organic-inorganic substances. Modified membranes displayed significantly enhanced antifouling characteristics compared to pristine membranes, with up to 60% lower flux decline and 22% reduction in irreversible fouling. The study provides insights into the fouling mechanisms and suggests effective and inexpensive membrane modification techniques for fouling mitigation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Maasa Yokomori, Hayato Suzuki, Akiyoshi Nakamura, Shigeo S. Sugano, Miho Tagawa
Summary: This study developed DNA-AuNP crystals for molecular encapsulation, demonstrating the efficacy of biotin modification in retaining molecules and successfully encapsulating CRISPR/Cas9 ribonucleoproteins into the crystals.
Article
Engineering, Chemical
Ali Monavari, Jafar Jamaati, Mehdi Bahiraei
Summary: The study investigates the effects of different particle shapes on the thermohydraulic performance of a boehmite nanofluid in a microchannel heat sink with various cross-sections. Results show that microchannels with triangular cross-sections exhibit the highest heat transfer coefficient and best temperature distribution, while nanofluids with platelet particles cause the highest pressure loss. Uniformity of temperature distribution and thermal resistance decrease with increasing Reynolds number, while heat transfer coefficient, pressure drop, and pumping power increase. Additionally, nanofluids with platelet particles demonstrate the highest heat transfer coefficient among all shapes tested.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)