Article
Biochemistry & Molecular Biology
Martha L. Jimenez-Gonzalez, Juan Pablo F. Rebolledo-Chavez, Marisela Cruz-Ramirez, Rene Antano, Angel Mendoza, Narayan S. Hosmane, Lena Ruiz-Azuara, Jose Luis Hernandez-Lopez, Luis Ortiz-Frade
Summary: In this work, an electrochemical study of the Boron cage monomercaptoundecahydro-closo-dodecaborate [B12H11SH](2-) in solution and in a self-assembled monolayer over a gold electrode was conducted. The study revealed the interaction between the boron cage and the gold surface, formation of a self-assembled monolayer, and the reduction of active sites on the gold surface due to the presence of the boron cage. Bulkier thiols were found to enhance charge accumulation at the electrode-solution interface.
Article
Nanoscience & Nanotechnology
Byung Min Jeon, Chan Ho Kim, Heeyeop Chae, Byungkwon Lim, Sung Min Cho
Summary: The role of self-assembled monolayer obtained by vacuum deposition of 4-aminopyridine (4-AP) as a metal nucleation inducer and adhesion promoter was verified. It was found that 4-AP effectively changed the substrate surface properties and improved the nucleation density of silver (Ag), resulting in a more transparent and low-resistance Ag thin film.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Marcin Gwiazda, Sheetal K. Bhardwaj, Ewa Kijenska-Gawronska, Wojciech Swieszkowski, Unni Sivasankaran, Ajeet Kaushik
Summary: This research presents an electrochemical immunosensor for collagen I detection using stable covalent immobilization of gold nanoparticles and enzymatically reduced antibodies, achieving high sensitivity in the range of pg/mL. The sensor's unique advantage lies in the appropriate orientation of antibodies onto the surface, good stability, and selectivity properties, with a detection range of 1 to 5 pg/mL.
Article
Nanoscience & Nanotechnology
Ayana Mizuno, Atsushi Ono
Summary: Plasmonic color modulation was demonstrated by controlling the interparticle distances in an assembled Ag nanocube monolayer, resulting in a transition from magenta to orange to yellow in transmitted light. This color modulation has the potential for applications in multispectral image sensors.
ACS APPLIED NANO MATERIALS
(2021)
Article
Optics
Zhengkun Wang, Haiyang Sha, Ke Yang, Yong Zhu, Jie Zhang
Summary: In this study, the plasmonic response of self-assembled monolayer silver nanoparticles was comprehensively investigated using various computational and experimental techniques. The Fano resonance and SERS application were studied, and it was found that the higher-energy antibonding mode is not only from the antibonding dipole-dipole mode, but also from the antibonding quadrupole-quadrupole mode and hybridized magnetic mode. The effects of dimer gap and size were discussed in detail, and a two coupled oscillators model was used to illustrate the mechanism of the Fano resonance.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Applied
Kishan Jayanand, Anupama B. Kaul
Summary: The study explores the plasmonic and excitonic interactions in two-dimensional (2D) semiconductors and zero-dimensional (0D) metal nanoparticles, revealing the tunability of the spectral response. The geometry of the hybrid structures affects the surface plasmon resonance (SPR) peaks, leading to a shift in the spectral response of the 2D semiconductor and influencing the carrier dynamics.
APPLIED PHYSICS LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Alan Stampini Benhame de Castro, Hauster Maximiler Campos de Paula, Yara Luiza Coelho, Eliara Acipreste Hudson, Ana Clarissa S. Pires, Luis Henrique M. da Silva
Summary: Understanding nonionic surfactant-protein interactions is crucial for both technological and scientific purposes, yet there is a lack of kinetic data. By using surface plasmon resonance (SPR), this study investigated the kinetic and thermodynamic parameters of bovine lactoferrin-Brij58 interactions at different temperatures under physiological conditions. The results showed that the adsorption process was accelerated with increasing temperature, leading to a more thermodynamically stable complex formation. The energetic parameters indicated that the potential energy barrier for complex formation primarily arises from the reduction in system entropy.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Multidisciplinary
Marko M. Petric, Malte Kremser, Matteo Barbone, Anna Nolinder, Anna Lyamkina, Andreas Stier, Michael Kaniber, Kai Mueller, Jonathan J. Finley
Summary: The combination of nanoplasmonic systems and optically active two-dimensional materials allows for the exploration and control of light-matter interactions at extreme subwavelength length scales. This study investigates the characteristics of a MoSe2 monolayer on individual gold dipole nanoantennas at room and cryogenic temperatures. The results reveal tuning of the dipolar resonance relative to the exciton and a coupling constant between exciton and plasmon, demonstrating active control of the coupling by varying the excitation light polarization.
Article
Materials Science, Multidisciplinary
Yifan Wu, Pinggen Cai, Qingmiao Nie, Chaojun Tang, Fanxin Liu, Mingwei Zhu
Summary: In this study, a novel approach is proposed to achieve ultra-narrowband, electrically switchable, and high-efficiency absorption in monolayer graphene. The approach involves sandwiching the monolayer graphene between a silica substrate and a square array of silver nanospheres, covered by a thick silica layer. The coupling between the dipolar plasmon resonance of the silver nanospheres and the zero-order diffraction wave at the Wood anomaly enhances the electromagnetic fields at the graphene surface, significantly improving near-infrared light absorption with a maximum efficiency of 45%. The proposed nanostructures also exhibit a modulation depth of nearly 100% for excellent switching properties.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Analytical
Cherrie May Olaya, Norihiko Hayazawa, Maria Vanessa Balois-Oguchi, Nathaniel Hermosa, Takuo Tanaka
Summary: The study demonstrates potential molecular monolayer detection through measurements of surface plasmon resonance and angular Goos-Hanchen shift. The presence of a benzenethiol self-assembled monolayer on a gold substrate enhances the Goos-Hanchen shift, dominated by angular shift.
Article
Engineering, Electrical & Electronic
Mengdi Lu, Haifeng Zhou, Wei Peng, Fang Wang, Ming Lin, Yang Zhang, Jijun Zhao, Jean-Francois Masson
Summary: In this study, a dual-mode electrochemical-surface plasmon resonance (EC-SPR) optical fiber sensor was developed for real-time quantitative investigation of heavy metal ions, offering high selectivity and sensitivity. The sensor exhibited good performance for monitoring Hg2+ and Cu2+ ions, even in the presence of other ions. The proposed fiber-based EC-SPR sensor showed advantages of real-time, miniaturized, and cost-effective sensing, paving the way for on-site environmental monitoring applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ruoqi Ai, Xinyue Xia, Han Zhang, Ka Kit Chui, Jianfang Wang
Summary: In this study, the coupling between individual asymmetric Au nanocups and excitons in WS2 monolayer and multilayer is investigated. The resonance coupling strength from weak to strong regimes is achieved by adjusting the orientation of the Au nanocups on WS2 monolayer. Different energy detunings are obtained by varying the size of the Au nanocup. A dependence of the coupling strength on the layer number is observed in the coupling between Au nanocups and WS2 multilayer. This research provides a promising approach for realizing different coupling regimes in a simple hybrid system.
Article
Optics
Jingwen Feng, Jinjuan Gao, Wen Yang, Runcheng Liu, Muhammad Shafi, Zhipeng Zha, Cong Liu, Shicai Xu, Tingyin Ning, Shouzhen Jiang
Summary: This paper presents the fabrication of a D-shaped plastic optical fiber (D-POF) LSPR sensor based on a monolayer graphene/gold nanoparticles (Gr(m)/Au NPs) three-dimensional (3D) hybrid structure. The number of plasmonic structure layers was found to be important for sensor performance, with the optimal electromagnetic field enhancement effect observed in a three-layer plasmonic structure. The sensor exhibited outstanding sensitivity, linearity, and reproducibility, and successfully detected the concentration of glucose, suggesting promising applications in medicine and biotechnology.
Article
Chemistry, Multidisciplinary
Bo Liu, Wenjing Yu, Zhendong Yan, Pinggen Cai, Fan Gao, Chaojun Tang, Ping Gu, Zhengqi Liu, Jing Chen
Summary: In this study, a physical mechanism to significantly enhance the light absorption efficiency of graphene monolayer is investigated. By utilizing the diffraction coupling of surface plasmon polariton resonances in a periodic array of metal nanoparticles, the electric fields on the graphene surface are greatly enhanced, leading to a remarkable improvement in the light absorption efficiency. The results provide important insights for the design of graphene-based photoelectric devices.
Article
Materials Science, Multidisciplinary
Valeri Lozovski, Christoph Lienau, Georgiy Tarasov, Zoryana Zhuchenko, Taras Vasyliev
Summary: The absorption of Si films covered with an array of ellipse-shaped metal nanoparticles (NPs) of identical orientation and shape is investigated theoretically. The results show that the morphology and material composition of NPs can affect their light absorption on ultrathin Si films.
RESULTS IN PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Kai Xu, Tero-Petri Ruoko, Morteza Shokrani, Dorothea Scheunemann, Hassan Abdalla, Hengda Sun, Chi-Yuan Yang, Yuttapoom Puttisong, Nagesh B. Kolhe, Jose Silvestre Mendoza Figueroa, Jonas O. Pedersen, Thomas Ederth, Weimin M. Chen, Magnus Berggren, Samson A. Jenekhe, Daniele Fazzi, Martijn Kemerink, Simone Fabiano
Summary: The polarity change of the Seebeck coefficient in highly doped polymers is found to be the result of filling and opening of a hard Coulomb gap in the density of states. The formation of multiply charged species and the opening of this hard Coulomb gap are responsible for the inversion of the Seebeck coefficient and the decrease in electrical conductivity. These findings have implications for the molecular design of next-generation conjugated polymers.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Applied
AliReza Rahimi, Morgan Murphy, Kinza Faiyaz, Shane J. Stafslien, Lyndsi Vanderwal, Madhura Pade, John A. Finlay, Anthony S. Clare, Dean C. Webster
Summary: This study demonstrates a new method to prepare self-stratified marine coatings with fouling-release properties. The performance of the coatings was influenced by factors such as molecular weight and ratio of hydrophobic and hydrophilic components. The prepared coatings showed promising performance compared to commercial marine coatings.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Bela Nagy, Mario Campana, Yury N. Khaydukov, Thomas Ederth
Summary: In this study, ampholytic polymer films were prepared using a self-initiated photografting and photopolymerization method. The films were characterized using ellipsometry, X-ray, and neutron reflectometry, and their swelling behavior was studied. The results showed that the polymer films had a stratified structure, with growth primarily occurring through grafting of solution-polymerized fragments to the surface. The study provides important insights into the SI-PGP grafting process and the formation of multilayer polymer films.
Article
Polymer Science
Lisa Schardt, Alejandro Martinez Guajardo, Julian Koc, Jessica L. Clarke, John A. Finlay, Anthony S. Clare, Harrison Gardner, Geoffrey W. Swain, Kelli Hunsucker, Andre Laschewsky, Axel Rosenhahn
Summary: Amphiphilic polymer coatings containing hydrophobic elements show superior anti-fouling performance compared to homopolymers, especially in marine environments. The reduced susceptibility to silt incorporation contributes to the improved fouling resistance of these coatings.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Environmental Sciences
Paul Whitworth, Nick Aldred, Kevin J. Reynolds, Joseph Plummer, Phillip W. Duke, Anthony S. Clare
Summary: The introduction of a surface into the marine environment leads to biofouling, which causes problems for maritime vessels and costs the industry a significant amount of money. UV-C LED technology shows promise in controlling biofouling at different dosages and irradiance levels.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Fareed Ahmed, Penghui Ding, Ujwala Ail, Magdalena Warczak, Andrea Grimoldi, Thomas Ederth, Karl M. O. Hakansson, Mikhail Vagin, Viktor Gueskine, Magnus Berggren, Xavier Crispin
Summary: This study proposes a method to quickly remove water from PEDOT:PSS suspension, forming thick freestanding films through a filtration process inspired by pulp dewatering on a wire mesh. The addition of carbon fibers overcomes wire mesh clogging, allowing fast formation of thick layers under simple atmospheric pressure filtration.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Biochemistry & Molecular Biology
Amanda K. Leonardi, Riddhiman Medhi, Aria Zhang, Nilay Duzen, John A. Finlay, Jessica L. Clarke, Anthony S. Clare, Christopher K. Ober
Summary: Biofouling is a disruptive process that affects the efficiency and durability of maritime vessel coatings. This study explores the use of morpholine moieties to create amphiphilicity in a PDMS-based coating, improving its antifouling properties. Comparison with PEG controls confirms the viability of morpholine structures as alternative hydrophilic groups.
Article
Chemistry, Multidisciplinary
Xinyue Zhang, Ralph Crisci, John A. Finlay, Hongyi Cai, Anthony S. Clare, Zhan Chen, Meredith N. Silberstein
Summary: Polymers are crucial in flexible sensor and soft actuator technology, and the ability to respond to external stimuli with programmable intensity and speed is highly sought after. This study introduces a tunable method of enabling environmentally adaptive polymers by incorporating polar functionalities into polydimethylsiloxane (PDMS). The exposure of polar functionalities, triggered by water, changes the hydrophilicity of the polymer. This reversible adaptation can be easily tailored, making it applicable to a wide range of polymers and offering potential for enhanced material performance.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Jackson Benda, Hayato Narikiyo, Shane J. Stafslien, Lyndsi J. VanderWal, John A. Finlay, Nick Aldred, Anthony S. Clare, Dean C. Webster
Summary: This study focuses on fine-tuning the amphiphilic properties of a siloxane-polyurethane (SiPU) coating by adjusting the content of PDMS and PEG in the coating matrix. The addition of surface-modifying amphiphilic additives further enhances the antifouling/fouling-release properties of the coatings. The results show that formulations with higher amounts of these additives exhibit significantly improved fouling-release performance, surpassing that of commercial standard FR coatings.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jana F. Karthaeuser, Julian Koc, Eric Schoenemann, Robin Wanka, Nick Aldred, Anthony S. Clare, Axel Rosenhahn, Andre Laschewsky
Summary: This study investigates the relationship between structure and antifouling potential of various polyzwitterion coatings. The polysulfabetaines coatings show effective resistance against non-specific protein adsorption and biofouling organisms, with the ability to tune their resistance through spacer modifications.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Riddhiman Medhi, Alicia Cintora, Elisa Guazzelli, Nila Narayan, Amanda K. Leonardi, Giancarlo Galli, Matteo Oliva, Carlo Pretti, John A. Finlay, Anthony S. Clare, Elisa Martinelli, Christopher K. Ober
Summary: In this study, two types of amphiphilic random terpolymers were synthesized and evaluated against diverse marine fouling organisms to study their antifouling and fouling-release properties. The precursor amine terpolymers were synthesized by atom transfer radical polymerization with different comonomer ratios and initiators, followed by selective oxidation to introduce nitroxide radical functionalities. The terpolymers were then incorporated into a PDMS host matrix to create coatings. The effectiveness of these systems against different fouling organisms was observed, with the nonfluorinated PEG and nitroxide combination identified as the most effective formulation against B. improvisus and F. enigmaticus.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Amparo Fernandez-Benito, Juan Carlos Martinez-Lopez, Mohammad Javad Jafari, Niclas Solin, Jose G. Martinez, Daniel Garcia-Gimenez, Thomas Ederth, Olle Inganaes, Javier Carretero-Gonzalez
Summary: Green and scalable materials are needed for electrification and sustainability. Researchers have synthesized and characterized polyelectrolyte complexes of alginate and chitosan for zinc ion transport in hydrogel electrolytes. The resulting biologically derived electrolytes exhibit high stability and conductivity.
Article
Materials Science, Multidisciplinary
Mohammad Javad Jafari, Fredrik G. Backlund, Tina Arndt, Benjamin Schmuck, Gabriele Greco, Anna Rising, Andreas Barth, Thomas Ederth
Summary: This study reports significant method-induced irreversible structural changes to both natural and synthetic spider silk fibers using the ATR-FTIR technique. Changing the contact force revealed correlated and largely irreversible changes in the secondary structure. The findings highlight the need for careful use and interpretation of ATR-FTIR spectroscopy.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Polymer Science
Emily Manderfeld, Ajitha Balasubramaniam, Onur oezcan, Charlotte Anderson, John A. Finlay, Anthony S. Clare, Kelli Hunsucker, Geoffrey W. Swain, Axel Rosenhahn
Summary: Perfluoropolyether dimethacrylate (PFPE-DMA) was polymerized onto surfaces using visible light-induced surface grafting polymerization. Surfaces were prepared by depositing an octadecyltrichlorosilane-monolayer and covalently coupling the photoinitiator isopropylthioxanthone. PFPE-DMA with different chain lengths were polymerized from the surface. The coatings exhibited antifouling properties against proteins and were evaluated in biological assays. The highest chain length of PFPE-DMA showed the strongest fouling reduction, suggesting that chain mobility contributes to fouling resistance.
Article
Spectroscopy
Mohammad Javad Jafari, Mohsen Golabi, Thomas Ederth
Summary: The use of infrared attenuated total reflection (IR-ATR) provides a simple method for assessing bacterial susceptibility to antibiotics by monitoring bacterial metabolic activities. Principal component analysis can quickly discriminate antimicrobial resistance based on obtained spectra.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
