Article
Chemistry, Multidisciplinary
Yongjun Lim, Seung-hyun Noh, Tae-Hyun Shin, Jung-uk Lee, Dominik Lungerich, Jae-Hyun Lee, Jinwoo Cheon
Summary: A single nanoparticle coating method is reported to form 1 nm polymeric shells with various chemical functional groups and surface charges. Nanosecond thermal energy pulses triggered polymerization in the region only a few nanometers from the surface of magnetic nanoparticles under exposure to alternating magnetic field. Modular coatings with different functional groups and surface charges can be achieved by selecting appropriate monomers.
Article
Chemistry, Physical
Tae Hyeon Jeong, Kyung Bin Kim, Su Yeon Kim, Yu Ra Kim, Jong Hoon Kim, Thi Minh Thu Pham, Tae Hwan Ha, Sang Jung Ahn, Moon-Deock Kim, Young Heon Kim
Summary: The behavior of AgNPs in simulated gastric fluids with and without pepsin was studied, showing dissolution at the initial stage, particle growth, and aggregation in the absence of pepsin. When pepsin was introduced, individual AgNPs were protected by the formation of a protein corona while still undergoing aggregation. This suggests that both individual NPs and their congregative characteristics should be considered for the evaluation of nanometer-scale materials' safety and toxicity.
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2021)
Article
Biophysics
Paulina Teper, Natalia Oleszko-Torbus, Marcelina Bochenek, Barbara Hajduk, Jerzy Kubacki, Lukasz Jalowiecki, Grazyna Plaza, Agnieszka Kowalczuk, Barbara Mendrek
Summary: This study successfully obtained stable star polymer layers with incorporated silver nanoparticles (AgNPs) and evaluated their antimicrobial activity. The synthesis of AgNPs directly by the star polymer layer was achieved by covalently binding polymeric stars with solid supports. The formation of AgNPs using only amine groups of the star arms and their efficacy were confirmed through analysis of layer thickness, water affinity, and silver incorporation. The prepared nanolayers demonstrated high antibacterial effectiveness against both gram-positive and gram-negative bacteria strains.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Agnieszka Krogul-Sobczak, Natalia Pisarek, Piotr Cieciorski, Elzbieta Megiel
Summary: This paper presents a successful application of densely grafted silver nanostructures with stable nitroxide radicals as an effective catalyst for the selective oxidation of alcohols. The fabricated ultra-small and narrow dispersive silver nanoparticles have been fully characterized and shown to work efficiently under mild conditions. The high selectivity and recyclability make this catalyst a promising choice for green oxidation processes.
Article
Chemistry, Multidisciplinary
Dorota Puchowicz, Alicja Nejman, Irena Kaminska, Malgorzata Cieslak
Summary: This study characterizes cotton and wool fabrics modified by silver nanowires, finding that the presence of dye significantly affects the surface modification with AgNWs, with the amount of nanowires deposited on wool increasing with higher dye contents. Surface-enhanced Raman spectroscopy effect was observed on both fabrics following AgNW modification.
Article
Polymer Science
Natalia Rivoli Rossi, Beatriz Rossi Canuto de Menezes, Aline da Graca Sampaio, Diego Morais da Silva, Cristiane Yumi Koga-Ito, Gilmar Patrocinio Thim, Tarcisio Jose de Arruda Paes-Junior
Summary: This study evaluated the antimicrobial effect of silver-coated silica nanoparticles in a glaze and soft reliner. The functionalized nanoparticles showed inhibition of fungal growth. However, further research is needed to improve the release of silver and enhance the antifungal potential of the nanoparticles.
Article
Multidisciplinary Sciences
Ahmed A. H. Abdellatif, Hamad N. H. Alturki, Hesham M. Tawfeek
Summary: The study investigated the use of cellulosic polymers as stabilizers in the formulation of silver nanoparticles with antioxidant and antibacterial activities. Results showed that AgNPs formulated using ethylcellulose and hydroxypropyl methylcellulose had significant antibacterial activities and were more internalized in Escherichia coli cells compared to other formulations.
SCIENTIFIC REPORTS
(2021)
Article
Biochemistry & Molecular Biology
Fozia Iram, Abida Yasmeen, Shazma Massey, Mohammad S. Iqbal, Sumreen Asim, Misbah Irshad, Hina Zahid, Athar Y. Khan, Syed G. T. Kazimi
Summary: Gold and silver nanoparticles were successfully synthesized using arabinoglucan from Lallemantia royleana seeds, showing high stability without the need for additional reducing or stabilizing agents. The nanoparticles exhibited excellent optical properties, with potential applications in surface-enhanced Raman spectroscopy. Silver nanoparticles demonstrated dose-dependent biological activities, including cytotoxicity against brine shrimps, HeLa cell lines, and tumors caused by A. tumefaciens.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Materials Science, Ceramics
Eva Krakor, Sven Saniternik, Isabel Gessner, Robert Frohnhoven, Michael Wilhelm, Marco Drexelius, Nurgul Tosun, Ines Neundorf, Sanjay Mathur
Summary: Intensive and overuse of antibiotics have led to a rise in antibiotic resistance globally, creating a demand for alternative treatments. Metal ions like copper, silver, and zinc have been used to inhibit microorganism growth for centuries. This study focuses on the synthesis of metal and oxide nanoparticles immobilized on hollow mesoporous silica capsules (HMSCs) for efficient antimicrobial effects against both Gram-positive and Gram-negative bacteria. The results show promising potential for metal-loaded capsules as antibacterial delivery vehicles, providing sustained bacterial inhibition over several hours.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Applied
Yang Cai, Wenyu Cheng, Chendong Ji, Zhiqiang Su, Meizhen Yin
Summary: This study presents a dye template strategy to construct silver nanohybrids with visible-light photocatalysis enhanced antibacterial effect. The nanohybrids exhibit efficient antibacterial performance against Staphylococcus aureus and Escherichia coli through a synergistic mechanism of Ag+ release and photocatalytic damage.
Article
Chemistry, Applied
Victor H. Pino-Ramos, Jessica C. Audifred-Aguilar, R. Sanchez-Obregon, Emilio Bucio
Summary: Tecoflex (R) polyurethane catheters were modified with acrylic acid to enhance hydrophilicity and antimicrobial properties. The modified catheters were able to load silver nanoparticles, displaying significant inhibition of Escherichia coli and Staphylococcus aureus bacteria growth with up to 80% eradication in killing tests.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Chemistry, Physical
Carin C. S. Batista, Alessandro Jager, Brunno L. Albuquerque, Ewa Pavlova, Petr Stepanek, Fernando C. Giacomelli
Summary: This study successfully synthesized polymer-stabilized silver nanoparticles (AgNPs) using microfluidic devices, resulting in nanoparticles with improved homogeneity. By adjusting the concentrations of the silver precursor and reducing agent, the size and polydispersity of the nanoparticles can be controlled. The use of the block copolymer PEO-b-P2VP as a stabilizer led to larger nanoparticles compared to those stabilized by PVP.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Biochemistry & Molecular Biology
Aoqiong Zeng, Ruijin Yang, Yanjun Tong, Wei Zhao
Summary: This study explored a direct biosynthetic method using microbial metabolism to prepare D-Saccharic acid potassium salt (SA)-grafted bacterial cellulose (SABC). Silver nanoparticles (AgNPs) with a diameter of approximately 25.2 nm were synthesized on SABC nanofiber surfaces through thermal reduction. SABC/AgNPs films exhibited high-efficiency bacteria-killing performance against Escherichia coli and Staphylococcus aureus. This work proposed a new method for preparing cellulose films with functional groups and demonstrated the potential of antimicrobial films containing AgNPs in wound healing treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Songlin Zhang, Yibing Deng, Alberto Libanori, Yihao Zhou, Jiachen Yang, Trinny Tat, Lin Yang, Wanxin Sun, Peng Zheng, You-Liang Zhu, Jun Chen, Swee Ching Tan
Summary: This article reports a method of creating a single homogeneous material platform using a silver-polymer framework, thus achieving seamless sensing-actuation unification. The SPF-based pneumatic actuator has multimodal sensing capability, enabling self-sensing deformations and perception of external stimuli.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Korath Shivan Sugi, Amritha P. P. Sandra, Nonappa, Debasmita Ghosh, Jyoti Sarita Mohanty, Murugesan Paulthangam Kannan, B. S. Sooraj, Pillalamarri Srikrishnarka, Jayoti Roy, Wakeel Ahmed Dar, Thalappil Pradeep
Summary: Orthogonal self-assembly is used to create complex superstructures from atomically precise silver nanoclusters, and the process is tunable by controlling the molar ratio of the ligand. The resulting nanostructures exhibit enhanced NIR emission due to restricted intramolecular motion.
Article
Engineering, Biomedical
Lourdes Albina Nirupa Julius, Lukas Matter, Nils Schuergers, Johannes Luetzenkirchen, Vanessa Trouillet, Teba Gil-Diaz, Emil R. Mamleyev, Annegret Wilde, Vlad Badilita, Jan G. Korvink
Summary: This study investigated different substrates for studying phototactic twitching motility of cyanobacteria and found that surfaces with a water contact angle of 80 degrees showed increased cell motility compared to a reference glass surface. Plasma-treated PDMS surfaces exhibited similar motility to glass surfaces, while untreated PDMS surfaces showed close to zero motility.
ACTA BIOMATERIALIA
(2023)
Article
Polymer Science
Jan Hobich, Eva Blasco, Martin Wegener, Hatice Mutlu, Christopher Barner-Kowollik
Summary: 3D printing techniques often use a single color light, but introducing a second color light can enhance control and open up new possibilities. Recently, printing techniques with two colors of light have emerged, showing great potential for development.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Vincent Hahn, N. Maximilian Bojanowski, Pascal Rietz, Florian Feist, Mariana Kozlowska, Wolfgang Wenzel, Eva Blasco, Stefan Braese, Christopher Barner-Kowollik, Martin Wegener
Summary: Most light-based 3D printing methods rely on optical or chemical nonlinearities for polymerization reactions. Two-photon absorption is commonly used in 3D micro-and nanoprinting, but this article reviews three emerging processes that allow for quadratic nonlinearity without relying on two-photon absorption, namely upconversion luminescence, two-step absorption, and triplet-triplet annihilation. These (1 + 1)-photon absorption processes enable the use of continuous-wave lasers at lower peak powers and cost compared to two-photon absorption. The article discusses recent progress, challenges, and future perspectives.
Article
Polymer Science
Philipp Neidinger, Dominik Voll, Sarah L. Walden, Andreas-Neil Unterreiner, Christopher Barner-Kowollik
Summary: This paper introduces the 800 nm two-photon pulsed laser polymerization (PLP) and demonstrates its working principle through biological tissue. The reliability of 2P PLP in determining propagation rate coefficients is shown using the example of the free radical polymerization of methyl methacrylate (MMA) at frequencies ranging from 10 to 100 Hz.
Article
Chemistry, Multidisciplinary
Irene Wacker, Ronald Curticean, Daniel Ryklin, Britta Weidinger, Frederik Mayer, Li-Yu Huang, Julian Hoffmann, Monsur Islam, Nadine von Coelln, Tanja Schmitt, Christian Huck, Petra Tegeder, Florian Feist, Jochen A. Kammerer, Christopher Barner-Kowollik, Martin Wegener, Eva Blasco, Ulrich Gengenbach, Rasmus R. Schroder
Summary: With the rapid progress in additive manufacturing, there is a demand for nanoscale characterization of micro-patterned heterostructures of soft materials. Advanced function-structure relationships can be achieved through direct 3D structuring, which requires morphological and spectroscopical imaging at nanometer resolution. This article demonstrates the use of serial ultramicrotomy to access the interior of 3D objects and highlights the power of correlative imaging and spectroscopy techniques for understanding emerging functions from nanoscopic structuring of carbon-based materials in 3D.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Salma Begum, Ksenia Kutonova, Anna Mauri, Meike Koenig, Ka Chun Chan, Christian Sprau, Christian Dolle, Vanessa Trouillet, Zahid Hassan, Tobias Leonhard, Stefan Heissler, Yolita M. Eggeler, Wolfgang Wenzel, Mariana Kozlowska, Stefan Braese
Summary: This study reports a distinct synthetic approach to develop disulfide-bridged 2D polymeric C3N3S3 triazine thin-films by interfacial thiol-disulfide dynamic exchange process. The resulting polymeric thin-films are covalently cross-linked, dynamic in nature, and feature tunable thickness and significant morphological variations. The thin films exhibit high reflectance transmittance, high refractive indices, and optical anisotropy.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tugce Nur Eren, Florian Feist, Katharina Ehrmann, Christopher Barner-Kowollik
Summary: Independently addressing photoreactive sites within one molecule with two colours of light is a daunting task. In this study, we combine two sequence independent and λ-orthogonal chromophores in one heterotelechelic dilinker molecule, utilizing the same reaction partner, a maleimide-containing polymer, to exploit their distinct reactivity. We demonstrate that polymer network formation can only occur when two colours of light are employed. Linker-decorated post-functionalized polymers are generated at either wavelength and in either sequence upon single colour irradiation. However, network formation is achieved only through sequential or simultaneous irradiation with two colours of light. The introduced photoreactive system highlights the power of wavelength orthogonal chemistry in macromolecular synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Steven C. Gauci, Filip E. Du Prez, Joshua O. Holloway, Hannes A. Houck, Christopher Barner-Kowollik
Summary: This study demonstrates the power of photochemical action plots in understanding the wavelength-resolved photochemistry of two triazolinedione (TAD) substrates. Despite having similar absorption spectra, the TAD substrates exhibit vastly different photoreactivity. By designing a 'hybrid' bisfunctional TAD molecule, the exceptional and site-selective (photo)chemical behavior of both substrates is demonstrated within a single small molecule.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Patrick H. Maag, Florian Feist, Vinh X. Truong, Hendrik Frisch, Peter W. Roesky, Christopher Barner-Kowollik
Summary: We introduce a class of single-chain nanoparticles (SCNPs) that can unfold completely in response to visible light (λ(max)=415 nm). The initial folding is achieved through a simple esterification reaction of the polymer backbone, introducing bimane moieties, which allow for light-driven unfolding by reversing the ester-bond formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Lena Witzdam, Berlind Vosberg, Katharina Grosse-Berkenbusch, Sandra Stoppelkamp, Hans Peter Wendel, Cesar Rodriguez-Emmenegger
Summary: In this study, a modulatory coating system based on C1-esterase inhibitor (C1INH) was proposed to effectively regulate the activation of FXII, improving the hemocompatibility of medical device surfaces without interfering with the overall hemostasis process.
MACROMOLECULAR BIOSCIENCE
(2023)
Article
Polymer Science
Jenny Englert, Lena Witzdam, Dominik Soeder, Manuela Garay-Sarmiento, Anton Joseph, Anna M. Wagner, Cesar Rodriguez-Emmenegger
Summary: This research presents a bioinspired strategy to immobilize vesicles without prior modification, using antifouling diblock copolymers and ultrathin surface-attached hydrogels. The method combines long-range attraction and short-range repulsion to capture and protect vesicles at the surface, and shows potential for a wide range of biomedical applications.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Sarah Walden, Joshua Carroll, Andreas-Neil Unterreiner, Christopher Barner-Kowollik
Summary: This article reveals a fundamental mismatch between the absorption spectrum of a chromophore and its photochemical reactivity, highlighting the limitations of the assumption that effective photochemical reactions require strong overlap between the absorption spectrum and the excitation wavelength. The article proposes future directions for understanding action plots and explores the importance of action plots in designing precise photochemical applications.
Review
Chemistry, Multidisciplinary
Xingyu Wu, Christopher Barner-Kowollik
Summary: The development of synthetic macromolecular chemistry has made significant progress in controlling the properties of soft matter materials with molecular precision. Fluorescence-based techniques have emerged as a powerful tool for macromolecular characterization, providing detailed information and deeper insights beyond commonly used analytical methods. This article critically examines the applications of fluorescence phenomena, principles, and techniques in characterizing macromolecules and soft matter materials, highlighting recent advances and discussing future opportunities and challenges.
Article
Chemistry, Multidisciplinary
Steven C. Gauci, Filip E. Du Prez, Joshua O. Holloway, Hannes A. Houck, Christopher Barner-Kowollik
Summary: This study demonstrates the power of photochemical action plots by investigating two TAD substrates with similar absorption spectra but vastly different photoreactivity. The design of a hybrid TAD molecule enables the formation of a dual-gated reaction system, showcasing exceptional and site-selective (photo)chemical behavior within a single small molecule.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Zizhen Ding, Travis Klein, Christopher Barner-Kowollik, Mohammad Mirkhalaf
Summary: This article systematically and critically reviews the fabrication, mechanics, and multi-functionality of nacre-like materials over the past three years. It discusses different fabrication techniques, evaluates the mechanical properties and multifunctionality of the materials, and provides suggestions for future research.
MATERIALS HORIZONS
(2023)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
