Article
Materials Science, Biomaterials
Mingjie Jia, Xinyu Yang, Yanan Chen, Meie He, Weixiu Zhou, Jiaomin Lin, Lu An, Shiping Yang
Summary: By employing a geometric confinement strategy, Gd chelates are restricted within the channels of a porous metal-organic framework material (MOF-808) to increase their longitudinal relaxivity. This approach resulted in a highly efficient T-1-weighted contrast agent with potential for use in MRI-guided photothermal therapy.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Chemistry, Multidisciplinary
Johar Amin Ahmed Abdullah, Mercedes Jimenez Rosado, Antonio Guerrero, Alberto Romero
Summary: This study aims to investigate the green synthesis of ZnO-NPs using a polyphenol-rich extract from Phoenix dactylifera L. as a reducing agent. The effects of precursor and reducing agent concentration were evaluated, and it was found that using a green reducing agent resulted in ZnO-NPs with a particle size ranging from 18.1 to 61.6 nm. The synthesized nanoparticles demonstrated antioxidant and antibacterial activities. Therefore, this method could be a suitable alternative to toxic methods for metallic nanoparticle synthesis.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Biomedical
Isadora Martini Garcia, Abdulrahman A. Balhaddad, Yucheng Lan, Andressa Simionato, Maria Salem Ibrahim, Michael D. Weir, Radi Masri, Hockin H. K. Xu, Fabricio Mezzomo Collares, Mary Anne Samapio Melo
Summary: This study developed dental adhesives containing superparamagnetic iron oxide nanoparticles (SPIONs) to enhance penetrability into dentin guided by a magnetic field. The adhesives were tested for physical, chemical, antibacterial properties, and cytotoxicity. By simulating pulpal pressure concurrently with a magnetic field, it was shown to be feasible to overcome the jeopardization on bond strength caused by pulpal pressure. The magnetic-responsive adhesives showed great potential to improve bond strength, presenting a promising strategy to enhance resin-based restorations' longevity without affecting biological properties of adhesives.
ACTA BIOMATERIALIA
(2021)
Article
Dentistry, Oral Surgery & Medicine
Heitor Ceolin Araujo, Juliano Pelim Pessan, Anne Caroline Morais Caldeira, Caio Sampaio, Marcelo Jose dos Santos Oliveira, Douglas Henrique Sales, Silvio Rainho Teixeira, Carlos Jose Leopoldo Constantino, Alberto Carlos Botazzo Delbem, Sandra Helena Penha Oliveira, Gordon Ramage, Douglas Roberto Monteiro
Summary: This study developed and characterized a dual nanocarrier of chlorhexidine and fluconazole, and evaluated its antibiofilm and cytotoxic effects. The results showed that the dual nanocarrier had superior antibiofilm effects compared to the combination of chlorhexidine and fluconazole, without increasing cytotoxicity.
JOURNAL OF DENTISTRY
(2023)
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
Enrico Bianchetti, Cristiana Di Valentin
Summary: Through density functional theory calculations, it has been found that using multidentate ligands can inhibit the process of spin-canting in nanoparticles, and the presence of anchoring organic acids can also interfere with structural disorder.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Oksana Petrichenko, Aiva Plotniece, Karlis Pajuste, Martins Rucins, Pavels Dimitrijevs, Arkadij Sobolev, Einars Sprugis, Andrejs Cebers
Summary: The study focused on evaluating the impact of different substitutions and substitution positions on the physicochemical properties of 1,4-DHP molecules and the formation of magnetoliposomes. The results showed that alkyl chain length affects the thermal behavior of 1,4-DHP molecules, but variations in substitution positions had minimal influence on liposome properties.
Article
Electrochemistry
Abraham Sainz-Rosales, Leonardo D. Pedraza-Herrera, M. E. Cano, N. Casillas, Maximiliano Barcena-Soto, Erika Roxana Larios-Duran
Summary: This study presents a simple and innovative method to efficiently produce magnetite nanoparticles and selectively generate side products by controlling the dissolved oxygen in the reaction media.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Polymer Science
Tzer-Liang Hu, Guan-Yu Chen, Shih-Chen Shi, Jason Hsiao Chun Yang
Summary: A bioactive peptide has been successfully grafted onto nano-CuO impregnated Tencel membranes via a simple and rapid method, showing excellent antimicrobial properties and promoting fibroblast cell viability.
Article
Nanoscience & Nanotechnology
Quyen T. Nguyen, Elodie Rousset, Van T. H. Nguyen, Vincent Colliere, Pierre Lecante, Wantana Klysubun, Karine Philippot, Jerome Esvan, Marc Respaud, Gilles Lemercier, Phong D. Tran, Catherine Amiens
Summary: An efficient hybrid photocatalyst for water oxidation, composed of a ruthenium polypyridyl complex grafted onto core/shell Fe@FeOx nanoparticles through a phosphonic acid group, showed significantly improved performance compared to traditional photocatalysts. This enhancement is attributed to more efficient electron transfer resulting from the covalent link between the ruthenium photosensitizer and the Fe@FeOx catalyst.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Michel P. de Haan, Naveen Balakrishnan, Andriy R. Kuzmyn, Guanna Li, Hendra M. Willemen, Gunnar Seide, Goverdina C. H. Derksen, Bauke Albada, Han Zuilhof
Summary: By grafting alizarin onto ZnO nanoparticles, the thermal and photostability of the natural colorant were improved, allowing its application in the fabrication of polyamide fibers with minimal color changes and better performance.
Article
Chemistry, Physical
G. M. Ibrahim, Saad Melhi Alshahrani, Eid Hamed Alosaimi, Wafa A. Alshahrani, B. El-Gammal, A. Fawzy, Nada Alqarni, Habib Elhouichet, Hosam M. Safaa
Summary: Magnetite was chemically treated with an active compound to prepare TMSPT-FCMNPs with controlled morphology and stability. These nanoparticles showed low spin properties and high adsorption capacity for anionic dye CR under Freundlich isothermal conditions.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Chemistry, Physical
Idoia Castellanos-Rubio, Oihane Arriortua, Daniela Iglesias-Rojas, Ander Baron, Irati Rodrigo, Lourdes Marcano, Jose S. Garitaonandia, Inaki Orue, M. Luisa Fdez-Gubieda, Maite Insausti
Summary: Magnetite Fe3O4 is a preferred iron oxide phase for nanotechnological and biomedical applications, but its synthesis often faces challenges such as polydispersity and stoichiometry control. A systematic optimization of the iron oleate decomposition method has been proposed to obtain Fe3O4 single nanocrystals, addressing issues of complexity and inefficiency while enhancing hyperthermia performance.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kyle M. Kirkpatrick, Benjamin H. Zhou, Philip C. Bunting, Jeffrey D. Rinehart
Summary: Magnetization is a measurable property of materials that provides information about their electronic structure, phase purity, and impurities. Superparamagnetism, a size-dependent property of magnetic materials, has been underexplored in the field of quantum materials. In this study, a statistical model is used to analyze a dataset of variable-size superparamagnetic Fe3O4 particles. The results show that parameters of the intrinsic probability distribution, such as the maximum susceptibility, are more suitable for describing the superparamagnetic behavior compared to standard measures like saturation magnetization. This analysis has potential applications in synthesis diagnostics and prediction of new properties and functionality.
Article
Chemistry, Multidisciplinary
Johar Amin Ahmed Abdullah, Alvaro Diaz-Garcia, Jia Yan Law, Alberto Romero, Victorino Franco, Antonio Guerrero
Summary: This study investigates the impact of pH levels and washing solvents on magnetism properties of chemical nanomagnetic iron oxide particles (CNMIOPs) synthesized through a chemical method. By employing different pH levels and washing solvents, the researchers found that pH and washing process significantly affect the properties of CNMIOPs, with higher pH levels resulting in smaller particles with higher crystallinity. Ethanol-washed CNMIOPs exhibit superior magnetic behavior, and higher pH levels show promising antioxidant activity.
Article
Chemistry, Analytical
Laurent Bouffier, Dodzi Zigah, Neso Sojic, Alexander Kuhn
Summary: This contribution reviews recent studies on the use of bipolar electrochemistry in analytical chemistry, highlighting the emergence of novel and original approaches in the past decade. The revival of interest in this approach demonstrates its exciting virtues and potential for tackling analytical challenges in unconventional ways. Integration of aspects of bipolar electrochemistry may lead to new ideas and unexpected directions in research.
ANNUAL REVIEW OF ANALYTICAL CHEMISTRY, VOL 14, 2021
(2021)
Article
Chemistry, Multidisciplinary
Gerardo Salinas, Kostiantyn Tieriekhov, Patrick Garrigue, Neso Sojic, Laurent Bouffier, Alexander Kuhn
Summary: A new mechanism for autonomous swimmers has been proposed, utilizing the synergy between ion flux and an external magnetic field to increase swimmer speed significantly; additionally, the magnetic field orientation adjustment can control the trajectory of the swimmer, resulting in predictable motion direction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Review
Chemistry, Multidisciplinary
Yiran Zhao, Laurent Bouffier, Guobao Xu, Gabriel Loget, Neso Sojic
Summary: This paper reviews the combination of electrochemiluminescence (ECL) with semiconductor (SC) materials, which has provided new applications and opportunities in (bio)sensing and imaging. The recent advances in generating ECL in original configurations are highlighted, from utilizing bulk SC as electrode materials to using SC nanocrystals or quantum dots as bright ECL nano-emitters. The challenges and future prospects in designing new detection strategies in (bio)analytical chemistry, light-addressable systems, imaging, and infrared devices are also discussed.
Review
Electrochemistry
Gerardo Salinas, Serena Arnaboldi, Laurent Bouffier, Alexander Kuhn
Summary: Bipolar electrochemistry provides an attractive alternative method for synthesizing and characterizing the properties of conducting polymers, featuring wireless and asymmetric characteristics. The synergy between bipolar electrochemistry and conducting polymers has been increasingly explored for controlled electrogeneration, surface modification, and characterization of various pi-conjugated polymers in recent years.
Article
Chemistry, Multidisciplinary
Pacharapon Kankla, Patraporn Luksirikul, Patrick Garrigue, Bertrand Goudeau, Laurent Bouffier, Alexander Kuhn
Summary: An innovative wireless approach is proposed for asymmetric site-selective deposition of gold clusters on graphene oxide microsheets by performing bipolar electrochemistry at the 3D air|liquid interface present in an assembly of bubbles constituting a foam. The exfoliated graphene oxide (EGO) microsheets are introduced into a bipolar electrochemical cell filled with foam composed of a nonionic surfactant, water, and a gold metal precursor, enabling successful site selective modification with gold clusters.
ADVANCED MATERIALS INTERFACES
(2022)
Review
Chemistry, Physical
Neso Sojic, Laurent Bouffier
Summary: This opinion article briefly reviews the different strategies developed to translate an electrochemical process into a luminescence signal. It also selects and comments on several key examples to highlight the key advantages of coupling electrochemistry with optical imaging, mainly fluorescence and electrochemiluminescence.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Gerardo Salinas, S. Mohsen Beladi-Mousavi, Liubov Gerasimova, Laurent Bouffier, Alexander Kuhn
Summary: Bipolar electrochemistry (BE) is a wireless electrochemical technique that utilizes an array of light-emitting diodes with different lengths to image the transient electrochemical activity of different redox species. The intensity of light emission allows differentiation of redox systems and evaluation of their diffusion behavior.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Hiu Mun Man, Ievgen Mazurenko, Hugo Le Guenno, Laurent Bouffier, Elisabeth Lojou, Anne de Poulpiquet
Summary: Understanding the effects of environmental factors on the efficiency and stability of bioelectrodes is crucial for the development of high-performance bioelectrochemical devices. This study investigates the influence of ionic strength on electro-enzymatic catalysis using fluorescence confocal microscopy and electrochemistry. The results demonstrate that both the activity and stability of the enzyme are maintained with an electrolyte concentration of up to 0.5 M. Furthermore, the study highlights the importance of a minimal electrolyte concentration for electro-enzymatic experiments to ensure the availability of charged substrates at the electrode surface.
ANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
Alice L. Dauphin, Jose Maria Andres Castan, Jing Yu, Philippe Blanchard, Neso Sojic, Hyun S. Ahn, Bright Walker, Clement Cabanetos, Laurent Bouffier
Summary: This study investigates the electrochemiluminescence (ECL) of the promising benzothioxanthene dicarboximide (BTXI) structure in acetonitrile solutions and compares it with a diphenylamine (DPA) derivative. Results show that BTXI exhibits ECL activity in both annihilation and co-reactant mechanisms. The efficiency of BTXI as an ECL emitter is influenced by its combination with co-reactants, where the green BTXI emitter is more effective due to a larger photoluminescence quantum yield. The involvement of the same excited states in the ECL and photoluminescence processes is observed. The chemical engineering of BTXI is shown to be an effective platform for achieving tunable ECL generation.
Review
Chemistry, Physical
Sara Knezevic, Laurent Bouffier, Baohong Liu, Dechen Jiang, Neso Sojic
Summary: Electrochemiluminescence (ECL) is a light-emitting phenomenon triggered by electrochemistry, which enables high-precision imaging of luminescent signals. The field of ECL is rapidly evolving from an analytical method widely used in biosensing to a novel microscopy technique. Improving electrode materials, luminophore/coreactant systems, and experimental configurations are the main focus of research.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Anne de Poulpiquet, Neso Sojic, Laurent Bouffier, Alexander Kuhn, Dodzi Zigah
Summary: Electrochemistry is an important topic taught in undergraduate chemistry programs, but students often find it difficult due to the combination of various physical concepts involved. Bipolar electrochemistry is of special interest for teaching purposes, as it has a simple setup and allows for the tuning of electrochemical reactions through manipulating the electric field. Basic experiments using a commercially available light emitting diode (LED) as a bipolar electrode are introduced here, illustrating the key parameters driving electrochemical reactions and providing an eye-catching introduction to general electrochemistry.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Chemistry, Physical
Ritu Toor, Lysandre Hourdin, Sharvina Shanmugathasan, Pauline Lefrancois, Stephane Arbault, Veronique Lapeyre, Laurent Bouffier, Jean-Paul Douliez, Valerie Ravaine, Adeline Perro
Summary: The design of enzymatic droplet-sized reactors is an important challenge with potential applications in medical diagnostics, water purification, bioengineering, and the food industry. This study demonstrates the construction of enzymatic reactors using coacervates formed by ampholyte polymer chains stabilized with agar. The coacervates can sequester and preserve the catalytic activity of enzymes such as glucose oxidase and catalase. The study investigates the enzymatic cascade reaction within the coacervates and provides new insights into the impact of proximity and confinement on enzymatic activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Editorial Material
Electrochemistry
Alice L. Dauphin, Jose Maria Andres Castan, Jing Yu, Philippe Blanchard, Neso Sojic, Hyun S. Ahn, Bright Walker, Clement Cabanetos, Laurent Bouffier
Article
Electrochemistry
Gerardo Salinas, Laurent Bouffier, Neso Sojic, Alexander Kuhn
Summary: Thermodynamics is an intriguing aspect of physical chemistry that is involved in various natural phenomena. The spontaneity of a chemical reaction is directly related to fundamental thermodynamic parameters such as the Gibbs free energy change. The visualization of electromotive force allows students to understand the underlying concepts of spontaneity in coupled reactions. This study introduces the thermodynamic concept of spontaneity to undergraduate students using the concepts of endogenous and exogenous bipolar electrochemistry. By encoding the chemical information of two coupled reactions through the light emission of a light-emitting diode used as a bipolar electrode, the thermodynamic information of the involved redox reactions can be directly read out.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
S. Mohsen Beladi-Mousavi, Gerardo Salinas, Laurent Bouffier, Neso Sojic, Alexander Kuhn
Summary: A study reports the generation of electrochemiluminescence (ECL) in confined free-standing 2D spaces, exemplified by surfactant-based air bubbles. By trapping graphene sheets as bipolar ECL-emitting electrodes in the ultrathin walls of the bubbles, the required potential for ECL generation is significantly reduced. This study highlights the key advantages of a 2D environment for wireless activation of ECL at low potentials.