Article
Chemistry, Physical
Elton L. Correia, Siddharth Thakur, Aanahita Ervin, Emma Shields, Sepideh Razavi
Summary: Mixed systems of nanoparticles and surfactants have a wide range of applications and their behavior is influenced by various factors such as surface charge, particle's wettability, surfactant solubility, and solution conditions. The previous studies mainly focused on systems with opposite charges, while the behavior of systems with like-charged species remains poorly understood. This study investigates the adsorption of surfactant onto negatively charged particles and provides valuable insights into this complex topic.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Review
Materials Science, Ceramics
Andressa da Cruz Schneid, Lindomar Jose Calumby Albuquerque, Gabriela Borba Mondo, Marcelo Ceolin, Agustin Silvio Picco, Mateus Borba Cardoso
Summary: This review article provides an overview of the common and promising strategies for generating colloidally stable silica nanoparticles (NPs) in simulated biological fluids, and highlights the latest advances in producing degradable silica-based structures. The article emphasizes the potential of silica NPs as versatile nano-platforms for imaging and disease treatment, while acknowledging the challenges arising from their colloidal stability loss and possible aggregation and degradation in biological fluids. Strategies to overcome these challenges, such as surface functionalization and chemical modification, are discussed. The article underscores the importance of understanding the behavior of silica NPs in body fluids for the approval of nanomedicines and calls for further research on the dynamics, thermodynamics, biological response, and structural parameters of silica-based NPs.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Uiseok Hwang, Junyoung Kim, Na-Yeon Kim, Kisuk Choi, June-Young Chung, Taesung Kim, Jonghwan Suhr, Jae-Do Nam
Summary: The study introduces a novel method for preparing hierarchical core-shell ceria/silica microspheres, which control the surface charge of particles by adjusting the thickness of the outer shell, enhancing product stability and utilization windows, showing great potential for various applications.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Anil Kumar, Smritilekha Bera, Man Singh, Dhananjoy Mondal
Summary: Surface functionalization of silica nanoparticles with biomolecules was performed through physical adsorption to produce f-SiNPs, and their structural and physicochemical properties were studied using various spectroscopic techniques. Different functionalized silica nanoparticles showed distinct properties in interaction with plant DNA, with some exhibiting strong intercalation properties while others leading to DNA denaturation or replication.
Article
Chemistry, Multidisciplinary
Nanji J. Hadia, Yeap Hung Ng, Ludger Paul Stubbs, Ole Torsaeter
Summary: Surface modification of nanoparticles using a combination of zwitterionic and hydrophilic silanes has been shown to improve stability under high salinity and high temperature conditions. Accelerated stability analysis predicts that the modified nanoparticles can remain stable for at least 6 months, with contact angle measurements indicating potential effectiveness in carbonate reservoirs.
Article
Physics, Multidisciplinary
Carolina van Baalen, Jacopo Vialetto, Lucio Isa
Summary: This study explores the control of crystallization of colloidal particles at oil-water interfaces using oil-soluble electrolytes. The results show that the repulsion among particles can be continuously tuned by introducing nanomolar amounts of an organic salt into the oil.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
Hyang Mi Lee, Yong Woo Kim, Eun Min Go, Chetan Revadekar, Kyu Hwan Choi, Yumi Cho, Sang Kyu Kwak, Bum Jun Park
Summary: Lee et al. design a like-charged colloidal model and characterize the Debye interaction for the first time at the water-oil interface. The Debye interaction plays an important role in self-assembling processes in materials.
NATURE COMMUNICATIONS
(2023)
Article
Energy & Fuels
Yan Xin, Zhaomin Li, Yongpeng Sun, Mengyuan Zhang, Binfei Li, Caili Dai
Summary: In this study, the effects of different factors on flow resistance reduction performance of ultralow permeability reservoirs were investigated. The results showed that the nanofluid, with specific matching coefficient, content, injection volume, and adsorption time, can effectively reduce water flow resistance. The nanoparticle adsorption on the core pore surface resulted in a decrease in surface roughness, change in surface hydrophobicity, and a hydrophobic sliding effect, which effectively reduced water flow resistance.
Article
Chemistry, Multidisciplinary
Loredana Amigoni, Lucia Salvioni, Barbara Sciandrone, Marco Giustra, Chiara Pacini, Paolo Tortora, Davide Prosperi, Miriam Colombo, Maria Elena Regonesi
Summary: Assessing toxic effects in living organisms is crucial for the development of safe nanomedicines, and using Caenorhabditis elegans as an alternative model for physiological functionality parameters associated with nanoparticles showed that both cationic and anionic groups in nanoparticles can optimize safety and potential applications in nanooncology.
Article
Chemistry, Physical
B. Oyku Alan, Murat Barisik
Summary: This study investigates the impact of temperature on the surface charge of silica nanoparticles (SNP) with different sizes and roughness, revealing a significant increase in surface charge with higher temperatures. The deviation from existing theory due to temperature variation is characterized, indicating a complex relationship between temperature, particle size, and surface charge regulation. A phenomenological model is proposed to predict surface charge of SNPs based on particle size, roughness, and temperature, offering important insights for nanoparticle characterization and potential applications involving temperature adjustments.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Marion Schvartz, Florent Saudrais, Stephanie Devineau, Stephane Chedin, Frederic Jamme, Jocelyne Leroy, Karol Rakotozandriny, Olivier Tache, Guillaume Brotons, Serge Pin, Yves Boulard, Jean-Philippe Renault
Summary: Microplastic particles of polyethylene and polypropylene are highly present in aquatic environments and can be stabilized by a protein corona formed by proteins in biological media. This stability depends on various factors such as the particle's properties and the quality of the protein corona. Controlling these factors with proteins can offer potential applications in microplastic pollution control and remediation.
Article
Multidisciplinary Sciences
Veronica Bastos, Parastu Oskoei, Elina Andresen, Maysoon Saleh, Bastian Ruehle, Ute Resch-Genger, Helena Oliveira
Summary: This study investigated the transformations and potential toxicity of UCNPs under physiological conditions, demonstrating the importance of surface chemistry in their stability, dissolution behavior, and cytotoxicity. The results highlight the biocompatibility of certain surface modifications and the protective role of a sufficiently thick silica shell in preventing UCNP dissolution and release of cytotoxic ions.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
An Cao, Jingyi Tan, Dilong Liu, Zhiming Chen, Liguang Dou, Zhiqiang Liu, Yue Li
Summary: This study investigates the migration velocity differences of plasmonic nanoparticle oligomers in gel electrophoresis and finds that the mass property plays a crucial role. Theoretical simulations reveal that random inelastic collisions contribute to the mass-determining role. Guided by this role, direct electrophoretic separation of hetero-structured plasmonic dimers with high purity and yield can be easily achieved.
Article
Chemistry, Physical
Nicholas C. Starvaggi, B. Jack Bradford, Cameron D. L. Taylor, Emily B. Pentzer
Summary: In this study, we report a class of wettability tuned silica-based Pickering emulsifiers that can stabilize different fluid interfaces and be used for the preparation of microcapsules. Tailored wettability and interfacial activity at different interfaces can be achieved by modifying silica particles, allowing for the fabrication of hybrid architectures.
Article
Pharmacology & Pharmacy
Fatemeh Heidari, Seid Mahdi Jafari, Aman Mohammad Ziaiifar, Nicolas Anton
Summary: In this study, oil-in-water Pickering emulsions were prepared using modified silica nanoparticles and cetyltrimethylammonium bromide. The effects of different conditions on the physicochemical properties and stability of the emulsions were investigated. Results showed that temperature plays the most important role in the treatment of silica nanoparticles and determining the optimal experimental conditions.
Article
Chemistry, Inorganic & Nuclear
Rosalynn Nankya, David O. Opar, Min-Jae Kim, Seung-Min Paek, Hyun Jung
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Songa Choi, Jongsik Park, Mrinal Kanti Kabiraz, Youngmin Hong, Taehyun Kwon, Taekyung Kim, Aram Oh, Hionsuck Baik, Minseop Lee, Seung-Min Paek, Sang-Il Choi, Kwangyeol Lee
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Won-Jae Lee, Minseop Lee, Seung-Min Paek
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Ji-Hye Koo, Seung-Min Paek
Summary: A Ge/GeO2/graphene composite material was synthesized to address the volume expansion issue of germanium/germanium oxide nanoparticles during charge/discharge cycles. The material showed superior cycling stability by trapping Ge/GeO2 nanoparticles between graphene nanosheets to offset the volume expansion effect. Transmission electron microscopy images confirmed the distribution of Ge/GeO2 nanoparticles on graphene nanosheets.
Article
Chemistry, Multidisciplinary
Do-Gak Jeung, Minseop Lee, Seung-Min Paek, Jae-Min Oh
Summary: Silver oxide nanoparticles with controlled particle size were successfully obtained using citrate-intercalated layered double hydroxide as a substrate. The size, homogeneity, and purity of the silver oxide were influenced by the stoichiometric ratio of Ag/Al, with a higher Ag/Al ratio tending to produce silver oxide with a complex silver environment. The small particle size and homogeneous distribution of silver oxide showed advantages in antibacterial efficacy compared with bulk silver oxide.
Article
Chemistry, Multidisciplinary
Su-Bin Lee, Seung-Min Paek, Jae-Min Oh
Summary: The research proposed a method to immobilize AgNP on metal oxide for enhanced SERS activity. Characterization and SERS tests showed that the sample prepared at 600 degrees C exhibited the best performance.
Article
Chemistry, Multidisciplinary
Minseop Lee, Min-Sung Kim, Jae-Min Oh, Jin Kuen Park, Seung-Min Paek
Summary: The effect of electrical conductivity on the energy-storage characteristics of anode materials in sodium-ion batteries was investigated by hybridizing covalent organic nanosheets with highly conductive graphene nanosheets. The results showed that enhancing the electrical conductivity by forming a well-overlapped structure between CONs and GNs significantly improved the energy-storage properties of the hybrids. The potential for high-performance anodes for Na-ion batteries using this synthetic methodology was also highlighted.
Article
Chemistry, Inorganic & Nuclear
Jaegyeom Kim, Jinho Shin, Seung-Min Paek, Dae Sung Park, Seung-Joo Kim
Summary: The thermal redox reactions of a Ca-Cr-O system were studied under different atmospheric conditions using cyclic thermodiffractometry and thermogravimetry. The study revealed that the redox reaction could proceed reversibly under controlled atmosphere. Additionally, the crystal structure of delta-CaCr2O4 was determined for the first time in this study.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Crystallography
Jing Xie, Gyeong-Hyeon Gwak, Minseop Lee, Seung-Min Paek, Jae-Min Oh
Summary: Hydrocalumite structured layered double hydroxides (LDHs) with various Fe3+ ratios were prepared through a coprecipitation method, with the Fe3+ content controlled by applying Al3+; X-ray diffraction pattern showed only specific Ca/Fe ratios resulted in LDH formation; ternary LDHs with Ca-Al-Fe composition were successfully synthesized by controlling the Fe3+ content with Al, with Al increasing crystallinity. UV-vis and X-ray absorption spectroscopies revealed slight local distortion in coordination induced by Al but overall crystal stabilization in the LDH structure.
Article
Chemistry, Physical
Mrinal Kanti Kabiraz, Bibi Ruqia, Jeonghyeon Kim, Haesol Kim, Hee Jin Kim, Youngmin Hong, Mi Ji Kim, Young Kyoung Kim, Chan Kim, Won-Jae Lee, Wonkyun Lee, Gyo Hyun Hwang, Hyeong Cheol Ri, Hionsuck Baik, Hyung-Suk Oh, Young Wook Lee, Lei Gao, Hongwen Huang, Seung Min Paek, Youn-Jung Jo, Chang Hyuck Choi, Sang Woo Han, Sang-Il Choi
Summary: Grain boundaries have adverse effects on bimetallic platinum-cobalt (Pt-Co) nanocatalysts in the oxygen reduction reaction (ORR), as they promote cobalt leaching and cause changes in the surface composition, leading to reduced catalytic activity.
Article
Biochemistry & Molecular Biology
Jeong-Hun Jang, Minseop Lee, Ji-Hye Koo, Seung-Min Paek
Summary: In this study, Ge/RuO2 nanocomposites were successfully fabricated as anode materials for lithium-ion batteries. The well-dispersed Ge nanoparticles within the rutile-type RuO2 matrices enhanced the cycle stability and capacity retention of the anode material, resulting in higher discharge capacities and better capacity retention compared to Ge/GeO2 nanoparticles.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Minseop Lee, Min-Sung Kim, Jae-Min Oh, Jin Kuen Park, Seung-Min Paek
Summary: The research found that by hybridizing layered titanium oxides with covalent organic nanosheets (CONs), the resulting composite material exhibited improved electrical and ionic conductivity, making it a suitable anode material for sodium-ion batteries (SIBs). Additionally, the use of a hollow sphere morphology further enhanced the ionic conductivity by increasing the accessible area for sodium ions. The hybrid material demonstrated enhanced and stable electrochemical performance, outperforming the composite without CONs.
Article
Engineering, Environmental
Jeong-Hun Jang, Jae-Deok Seo, Seung-Min Paek, Man Park
Summary: Sulfide-occluded zeolites can simultaneously perform adsorption and precipitation reactions, resulting in synergistic effects on the removal of toxic cationic heavy metals from aqueous systems. We demonstrated that near complete decontamination of aqueous Hg cations to below the WHO guideline level of 1 ppb could be achieved with sulfide-occluded zeolites. Interestingly, the adsorption of cationic Hg species led to the formation of discrete HgS crusts on the surfaces of the zeolite crystals, which played a crucial role in preventing back-release of adsorbed Hg species and scavenging residual aqueous Hg species. Therefore, the in-situ cooperation of adsorption and precipitation reactions by sulfide-occluded zeolites can be applied for reliable and safe Hg decontamination of aqueous systems.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Jeong-Hun Jang, Minseop Lee, Soohyeon Park, Jae-Min Oh, Jin Kuen Park, Seung-Min Paek
Summary: This study proposes a new hybridization strategy of SnS2 and covalent organic nanosheets (CONs) to enhance the electrochemical performance of SnS2 materials. The CONs provide reaction sites for the growth of SnS2 nanoparticles, resulting in the formation of ultrathin SnS2 nanoplates on the CON nanosheets. The resulting SnS2-based CON exhibits outstanding cyclic stability and improved electrical and ionic conductivities in the lithium ion battery system.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Min-Sung Kim, Minseop Lee, Min-Jae Kim, Young Kyu Jeong, Jin Kuen Park, Seung-Min Paek
JOURNAL OF MATERIALS CHEMISTRY A
(2020)