ChemNanoMat最新文献

{"title":"Front Cover: (ChemNanoMat 3/2025)","authors":"","doi":"10.1002/cnma.202580301","DOIUrl":"https://doi.org/10.1002/cnma.202580301","url":null,"abstract":"<p>Cover image provided courtesy of Kazutaka Akiyoshi and co-workers.\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202580301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plasmonic Enhancement of Photothermal Conversion Efficiency in Gold-Nanoparticle Hydrogels","authors":"Mai S. Rashwan,&nbsp;Abed M. Al-Sheikh,&nbsp;Harihara Baskaran,&nbsp;Clemens Burda","doi":"10.1002/cnma.202400636","DOIUrl":"https://doi.org/10.1002/cnma.202400636","url":null,"abstract":"<p>This study investigates the photothermal properties of citrate-capped gold nanoparticles (Au NPs) dispersed in agarose gel, examining various sizes and concentrations, particularly within a low-concentration range (0.2–2.5 nM). Heat transfer measurements are conducted on Au NP hydrogels using laser-light induced heating, revealing a size- and concentration-dependent temperature increase compared to the plain agarose gel matrix. Experimental data, combined with finite-element analysis, demonstrate that photothermal energy conversion efficiencies are dependent on NP size and concentration, while the thermal conductivity (TC) of all Au NP hydrogels remains constant and independent of these parameters within the tested concentration range. UV-visible spectroscopy indicates that the observed photothermal heating arises from light absorption and scattering within the Au NP hydrogels. This work highlights the interplay between plasmonic Au NPs of varying sizes and hydrogels as host matrices, significantly impacting photothermal energy conversion properties. The findings herein aim to provide valuable insights for advancements in biomedical and energy-related applications.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400636","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid and Sensitive Glutathione Detection Using Water-Soluble Fluorescent Bimetallic Nanoparticles","authors":"Aditi Mahanty,&nbsp;Amit Akhuli,&nbsp;Chinmayee Patra,&nbsp;Joyoti Ghosh,&nbsp;Moloy Sarkar","doi":"10.1002/cnma.202400642","DOIUrl":"https://doi.org/10.1002/cnma.202400642","url":null,"abstract":"<p>This work aims to design and develop a simple but effective strategy for the selective and sensitive detection of glutathione (GSH) in aqueous medium by exploiting fluorescent bimetallic nanoparticles. To achieve this, water-soluble, fluorescent silver-capped gold nanoparticles (F−AgAu) has been synthesized and characterized through conventional methods. The sensing behaviour of the F−AgAu for several analytes of interest has been investigated by employing steady state and time-resolved spectroscopic techniques. Signaling strategy has been conceptualized by exploiting both “turn-on” and “turn-off” condition of the fluorescent nanoparticles against specific analytes in sequential manner. The method is based on the F−AgAu/Hg²⁺ system, where the initial fluorescence from F−AgAu is quenched (“turn-off”) by Hg²⁺. Time-resolved fluorescence studies have revealed that a photoinduced electron transfer (PET) process from nanoparticle to Hg²⁺ is primarily responsible for the fluorescence quenching behavior. Interestingly, in the presence of GSH, the fluorescence of the nanoparticle is found to be recovered (“on” state). The fluorescence “on” state of the nanoparticles is attributed to the competitive affinity of Hg²⁺ for thesurface ligand, GSH. More interestingly, it has been demonstrated that the present signaling strategy is quite effective in detecting GSH in various fruits and food samples at low concentration levels.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plasma-Assisted Hydroxyapatite/Chitosan Bionanocomposite Films with Improved Thermal Stability, Biomineralization and Optical Absorption Properties","authors":"Mazeyar Parvinzadeh Gashti,&nbsp;Sabrina Farch,&nbsp;Mahyar Parvinzadeh Gashti,&nbsp;Mohammad Pousti,&nbsp;Esfandiar Pakdel,&nbsp;Alessandro Francisco Martins,&nbsp;Khamis Siam","doi":"10.1002/cnma.202400577","DOIUrl":"https://doi.org/10.1002/cnma.202400577","url":null,"abstract":"<p>Hydroxyapatite (HAp) is a well-known precursor for synthesizing different bionanocomposite products for biomedical applications. For the first time, we aimed to evaluate the effects of plasma surface functionalization of HAp nanoparticles (NPs) on the chemical, physical, and bio-functional properties of chitosan films using experimental and computational evaluations. Atmospheric air plasma process was conducted on HAp NPs at two different air pressures (650 and 1300 mTorr) and four different exposure times (1, 3, 6, and 9 min), followed by fabrication of HAp/chitosan bionanocomposites. Fourier transform infrared (FTIR) spectra proved that the position of bands at 1639 and 1037 cm⁻¹ were shifted to 1635 and 1031 cm⁻¹ due to the interaction between chitosan amine groups and HAp phosphate groups. Quantum mechanical and molecular dynamic (MD) simulations were used to understand the interactions between chitosan and HAp. Density functional theory (DFT) calculations were used to explore the electronic properties of untreated and plasma-treated HAp (T-HAp). MD simulations using the PCFF force field were used to investigate the interactions of HAp/chitosan and T-HAp/chitosan bionanocomposites. According to the results from thermal gravimetric analysis (TGA), the duration of HAp NP plasma treatment is a significant factor in the weight loss properties for the resultant HAp/chitosan bionanocomposites. The overall reflectance % properties of films prepared with T-HAp NP samples decreased, confirming the potential applications for skin tissue protection against solar UV radiation. The bioactivity of the bionanocomposite films was also studied by examining the HAp formation by incubating in simulated body fluid.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cobalt Bis(Pyridinethiolate N-Oxide) as a Precursor for HER Active Co Nanoparticles and Particle Size-Dependent Electrocatalytic Properties","authors":"Esmee DenOtter,&nbsp;Virginia A. Larson,&nbsp;Nicolai Lehnert","doi":"10.1002/cnma.202400612","DOIUrl":"https://doi.org/10.1002/cnma.202400612","url":null,"abstract":"<p>The hydrogen evolution reaction (HER) produces (di)hydrogen (H₂), a clean energy carrier, through the cathodic side of the water splitting reaction. Specifically, this method of producing hydrogen is applicable to converting clean electricity and/or solar energy into a chemical fuel. Herein, a cobalt(pyridinethiolate N-oxide)₂ complex was synthesized through the reaction of cobalt sulfate with the aforementioned ligand and shown to be a four coordinate paramagnetic cobalt complex using paramagnetic nuclear magnetic resonance (NMR) spectroscopy, elemental analysis, and mass spectrometry. This complex was then tested for HER activity in homogeneous phase and embedded into reduced graphene oxide thin films and physisorbed onto a graphite rod electrode. Despite its similarity to other highly active molecular catalysts for HER, surprisingly, this complex did not show any reliable HER activity. Instead, in acidic DMF, HER active nanoparticles were reductively deposited onto a glassy carbon electrode. This is the first example, to the best of our knowledge, of a molecular cobalt thiolate complex that decomposes to make nanoparticles upon electrolysis rather than acting as a molecular catalyst for HER. The ellipsoidal Co nanoparticles were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), SEM energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma mass spectrometry (ICP-MS). The amount of deposited material, and the size and number of nanoparticles, was shown to increase with the number of deposition scans. Cyclic voltammetry scans showed that the onset potential for HER decreases and the catalytic current increases with the diameter of the nanoparticles. A drop-cast Nafion thin film improved the durability of the nanoparticle-covered electrodes, allowing for HER for at least 8 hrs. These electrodes have a Faradaic efficiency of 100±3 %, and produce 14.1 mmol H₂ per gram Co per second, at pH 1. The complex cobalt bis(mpo) is thus identified as an ideal precursor for the controlled electrodeposition of metallic Co nanoparticles with a defined size and shape.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400612","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Front Cover: Enhancing Epoxy Composites with Graphene and Graphene Oxide: Thermal and Mechanical Insights (ChemNanoMat 2/2025)","authors":"Sławomir Wilczewski,&nbsp;Zdzisław Nowak,&nbsp;Michał Maj,&nbsp;Magdalena Osial,&nbsp;PhD Roman Minikayev,&nbsp;Michael Giersig","doi":"10.1002/cnma.202580201","DOIUrl":"https://doi.org/10.1002/cnma.202580201","url":null,"abstract":"<p>The main objective of study is a comprehensive investigation of the mechanical properties of <b>epoxy polymer nanocomposites</b> infused with graphene-based nanoflakes, ranging from neat epoxy production to the characterization of nanoflakes and subsequent mechanical testing. However, besides the thermal and mechanical aspects, the improvement of the stability of the suspension during cross-linking with the graphene oxide is studied. More information can be found in the Research Article by Zdzisław Nowak, Michael Giersig, and co-workers.\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202580201","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Etching Time, Temperature of Metal Salts in Surface-texturized Silicon Fabricated Through One-Step Metal-Assisted Chemical Etching","authors":"A. A. Khairul Azri,&nbsp;S. F. Wan Muhamad Hatta,&nbsp;Y. Abdul Wahab,&nbsp;P. J. Ker,&nbsp;S. Mekhilef,&nbsp;M. A. Islam","doi":"10.1002/cnma.202400461","DOIUrl":"https://doi.org/10.1002/cnma.202400461","url":null,"abstract":"<p>This study delves into the Metal-Assisted Chemical Etching (MACE) of p-type monocrystalline silicon wafers, with a focus on tailoring surface morphology for heightened performance as thermal absorbers. Employing diverse metal catalysts—specifically, nickel nitrate hexahydrate and silver nitrate salts—the investigation systematically explores the impact of catalyst type, etching time and temperature on nanostructure formation. One of the objectives was to maintain the etching temperature to be as low as possible through the application of the metal catalysts. Achieving &gt;2 of thermal energy absorbance in the UV-Vis-NIR range required immersing samples in a nickel nitrate salt solution at room temperature for 60 minutes. Characterization through UV-Vis-NIR spectroscopy revealed reflectance and absorbance spectra, with silver nitrate salt-etched samples demonstrating exceptional performance, achieving the lowest reflectance values within the critical wavelength range of 300–1800 nm. Notably, after 60 minutes of etching, silver nitrate salt-etched samples produced reflectance values ranging from 0.19 % to 3.45 %. Optimized parameters for nickel nitrate salt-etched samples were identified at 30 minutes of etching and 50 °C, showcasing an average reflectance of 1.54 %. The consideration of energy conservation was paramount, prompting the initial observation of each catalyst's performance during the etching process with no heating at room temperature. Subsequently, in the extended phase of the study, the etching temperature was gradually increased. Raising the etching temperature served as a method of varying the process parameter to observe its impact on the formation of surface nanostructures and absorbing performance. The study concludes with recommendations for future research, advocating for the exploration of additional metal catalysts and investigation of combined catalysts.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Super Resolved Structural Imaging of Mitochondrial Network using Orange Emissive Carbon Nanodots as Fluorescent Probe","authors":"Richa Garg,&nbsp;Runmi Kundu,&nbsp;Kush Kaushik,&nbsp;Abdul Salam,&nbsp;Chayan Kanti Nandi","doi":"10.1002/cnma.202400638","DOIUrl":"https://doi.org/10.1002/cnma.202400638","url":null,"abstract":"<p>Super-resolution microscopy (SRM), coupled with appropriate small and photostable fluorescent probes, has revolutionized the ability to study organelle dynamics with unprecedented spatial and temporal resolution. An increasing trend of designing nanomaterial probes that have unprecedented advantages over organic molecular probes has become the frontier in SRM based imaging of subcellular organelles. Herein, we report the development of orange-emissive fluorescent carbon nanodots (CNDs) via a one-pot synthesis that has excellent capabilities to target mitochondria. Spectroscopic analysis confirms the presence of guanidine on the surface of CNDs, thus facilitating its ability to selectively target mitochondria. The CNDs were highly capable for the super-resolution radial fluctuation (SRRF) imaging of the mitochondrial network and the morphology. The synthesized CNDs exhibited high photostability, biocompatibility, and non-toxicity, which could be used for their application in mitochondria-based imaging modalities.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microfluidic Generation of Calcium Alginate Hydrogel Beads using External Gelation for Microalgae Cultivation","authors":"Du Tuan Tran,&nbsp;Fariba Malekpour Galogahi,&nbsp;Nhat-Khuong Nguyen,&nbsp;Uditha Roshan,&nbsp;Ajeet Singh Yadav,&nbsp;Kamalalayam Rajan Sreejith,&nbsp;Nam-Trung Nguyen","doi":"10.1002/cnma.202400549","DOIUrl":"https://doi.org/10.1002/cnma.202400549","url":null,"abstract":"<p>Calcium alginate hydrogel beads are spherical polymeric particles with highly crosslinked network structures, known for their excellent monodispersity and retention capabilities. These beads, produced by high-throughput droplet-based microfluidic techniques, are widely used for encapsulating and cultivating various microscopic particles such as cells. While internal gelation has been commonly utilized for crosslinking of calcium alginate hydrogel beads in microalgae encapsulation, the use of external gelation remains underexplored. This study utilized droplet-based microfluidic technology combined with external gelation to produce calcium alginate hydrogel beads for encapsulating the microalgal strain <i>Chlorella vulgaris</i>. Emulsions containing emulsified calcium ions served as the crosslinking phase. Initial geometrical analysis indicated that beads crosslinked with a high concentration of calcium ions (1 g/mL) achieve superior size uniformity and shape consistency. Microalgae cultivation experiments using these beads demonstrated steady growth of <i>Chlorella vulgaris</i> over a 5-day period, with the beads maintaining their geometric stability until the final day when minor cell leakage was observed. These results provide a foundation for future molecular-level studies on microalgae cultivation in hydrogel beads and suggest potential applications in fields requiring precisely controlled microalgae growth.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cnma.202400549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced the Long-Cycle Performance of SiOx/C Anode Materials Via Ti and Sn Bimetallic Doping Strategy","authors":"Baoguo Yang,&nbsp;Zhe Bai,&nbsp;Qian Luo,&nbsp;Zhenyuan Tang,&nbsp;Jun Li","doi":"10.1002/cnma.202400637","DOIUrl":"https://doi.org/10.1002/cnma.202400637","url":null,"abstract":"<p>Silicon oxide (SiO_x), due to its significant reversible capacity and significantly reduced volume expansion compared to pure silicon, holds promise as a candidate for high-performance lithium-ion battery anode materials. Unfortunately, SiO_x still faces challenges for commercialization due to its volume expansion exceeding 160 %, low initial coulombic efficiency, and low electrical conductivity. In this study, we employed metal oxides containing Ti and Sn to dope SiO_x/C materials, utilizing a sol-gel method to prepare SiO_x/TiO₂/SnO₂/C composite anode materials. Furthermore, we adjusted the doping ratios of Sn and Ti to explore the optimal amount for improving the electrochemical performance of the material. Ultimately, it was found that the SiO_x/TiO₂/SnO₂/C composite material prepared with a molar ratio of silicon, titanium, and tin at 10 : 0.7 : 0.3 exhibited the best performance, achieving an initial discharge capacity of 1845.33 mAh ⋅ g⁻¹ at a current density of 100 mA ⋅ g⁻¹ and maintaining a reversible capacity of 843.41 mAh ⋅ g⁻¹ after 100 cycles, with a capacity retention rate of 75.9 %. This work provides a relatively simple method to composite Ti and Sn metal oxides with SiO_x, introducing additional conductive pathways to enhance the material‘s conductivity.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 3","pages":""},"PeriodicalIF":2.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}