Article
Chemistry, Physical
Badri P. Mainali, Dhruba K. Pattadar, Francis P. Zamborini
Summary: The oxidation resistance of gold nanoparticles has a unique reverse size dependence for thiolate-coated nanoparticles, where the extent of oxidation increases with size, opposite to weakly stabilized or bare gold nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Review
Pharmacology & Pharmacy
Pamela M. Lundin, Briana L. Fiser, Meghan S. Blackledge, Hannah L. Pickett, Abigail L. Copeland
Summary: Bacterial infections caused by biofilms are responsible for 80% of bacterial infections in humans. The use of self-assembled monolayers (SAMs) as a chemical strategy to combat biofilm formation shows promise due to their strong covalent bonds and versatile synthesis. This review focuses on the use of SAMs to inhibit biofilm formation and graft biocidal agents, with potential applications in indwelling medical devices. The challenges and future directions for this field are also discussed.
Article
Chemistry, Physical
Aila Jimenez-Ruiz, Rafael Prado-Gotor, Jose G. Fernandez-Bolanos, Alejandro Gonzalez-Benjumea, Jose Maria Carnerero
Summary: Stable oleuropein-coated gold nanoparticles were synthesized in aqueous media for the first time. The concentration of oleuropein in the reaction medium was found to significantly impact the outcome and stability of the resulting nanocolloid, with smaller particle sizes observed in more concentrated solutions. Self-assembled structures of oleuropein were identified at a specific concentration threshold, contributing to both increased stability and reduced particle size in concentrated solutions.
Review
Chemistry, Multidisciplinary
Limin Wang, Ulrich S. Schubert, Stephanie Hoeppener
Summary: Surface modification using self-assembled monolayers has seen significant advancement in the past decade, with the introduction of new chemical reactions such as nucleophilic substitution, click chemistry, supramolecular modification, photochemical reaction, and others, enhancing the properties of solid substrates like silicon and glass.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Physics, Multidisciplinary
Zsuzsanna Koczor-Benda, Alexandra L. Boehmke, Angelos Xomalis, Rakesh Arul, Charlie Readman, Jeremy J. Baumberg, Edina Rosta
Summary: The article explores the molecular requirements for achieving efficient signal up-conversion in THz detection based on molecular optomechanics. A computational approach based on quantum-chemistry and machine-learning methods is developed to predict efficient THz detection, validated through experiments and virtual screening on databases of commercially available compounds. The study identifies key molecular properties and moieties for high activity in THz detection and demonstrates the potential applications of the screening method in surface-enhanced spectroscopy.
Article
Chemistry, Multidisciplinary
Christopher A. Petroff, Giuseppe Cassone, Jiri Sponer, Geoffrey R. Hutchison
Summary: This study presents novel piezoelectric force and touch sensors based on self-assembled monolayers of oligopeptides, which show large piezoelectric voltage response and are easily manufactured. Despite modest piezoelectric charge constants, the devices exhibit immense piezoelectric voltage constants. Additionally, a flexible device prototype with high open-circuit voltages is demonstrated, with potential for further improvements in voltage response through peptide selection and device construction.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Michele Perego, Stefano Kuschlan, Gabriele Seguini, Riccardo Chiarcos, Valentina Gianotti, Diego Antonioli, Katia Sparnacci, Michele Laus
Summary: Phosphorus delta-layers in SiO2 were prepared using PMMA terminated with a phosphorus-containing moiety. The concentration of phosphorus atoms in the delta-layers was mainly determined by the molecular weight of the P-terminated PMMA. While the grafting density was expected to increase with annealing time, the measured P dose in the delta-layers showed the opposite trend due to a distortion in the molecular weight distribution of the grafted species.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Analytical
Nada F. Atta, Ahmed Galal, Asmaa R. M. El-Gohary
Summary: The novel method features the one pot preparation of TU-SAMs over CNT-Au-nano, providing simplicity, efficiency, and time-saving advantages compared to other electrochemical methods. The use of gold nanoparticles enhances the stability of TU-SAMs and increases the immobilized S-functionalized compounds for better sensor performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Thomas P. Gray, Jun Nishida, Samuel C. Johnson, Markus B. Raschke
Summary: This study demonstrates vibrational excitons as a molecular ruler for measuring the delocalization of intermolecular wave functions and nano-domain size in SAMs. By combining experimental measurements and modeling, the domain sizes and distribution of 4-NTP SAM on gold surface were revealed.
Article
Biochemistry & Molecular Biology
Guadalupe Sanchez-Obrero, Irene Humanes, Rafael Madueno, Jose Manuel Sevilla, Teresa Pineda, Manuel Blazquez
Summary: This work focuses on the surface characterization of quaternary gold alloys and pure gold substrates. The study involves the evaluation of surface microstructure and composition using various techniques. The research also explores the corrosion resistance of 18K gold alloys and investigates the modification of metallic surface properties using self-assembled monolayers (SAM) formed from organic thiols. The study provides fundamental knowledge for potential applications in improving the bioactive properties of jewelry pieces based on 18K gold alloys.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Electrochemistry
Alessandro Serleti, Xinxin Xiao, Kim Shortall, Edmond Magner
Summary: This study demonstrated the sequential immobilisation of alcohol dehydrogenase (ADH), formaldehyde dehydrogenase (FLDH) and formate dehydrogenase (FoDH) on self-assembled monolayer modified electrodes. The enzymes retained a significant amount of initial activity after storage, showing the potential for their practical application.
Article
Chemistry, Physical
John C. Thomas, Antonio Rossi, Darian Smalley, Luca Francaviglia, Zhuohang Yu, Tianyi Zhang, Shalini Kumari, Joshua A. Robinson, Mauricio Terrones, Masahiro Ishigami, Eli Rotenberg, Edward S. Barnard, Archana Raja, Ed Wong, D. Frank Ogletree, Marcus M. Noack, Alexander Weber-Bargioni
Summary: This study investigates the impact of individual atomic defects on the macroscopic functionality of 2D materials using intelligent hyperspectral scanning tunneling spectroscopy (STS) mapping. By utilizing machine learning methods, the researchers autonomously collect and analyze spectroscopic data, and provide a customizable workflow for experimental decision-making. The results demonstrate the potential of artificial intelligence in hyperspectral STS mapping.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dennis Meier, Abhishek K. Adak, Peter Knecht, Joachim Reichert, Sourav Mondal, Nithin Suryadevara, Senthil Kumar Kuppusamy, Keitaro Eguchi, Matthias K. Muntwiler, Francesco Allegretti, Mario Ruben, Johannes V. Barth, Shobhana Narasimhan, Anthoula C. Papageorgiou
Summary: Tailored nano-spaces can control enantioselective adsorption and molecular motion through the spontaneous assembly of a dynamic system on Ag(111) using 2,6-bis(1H-pyrazol-1-yl)pyridine-4-carboxylic acid. The network cavity snugly hosts the chemically modified guest, bestows enantiomorphic adsorption, and allows selective rotational motions. Hydrogen bonding plays a crucial role in stabilizing the rotating guest and influencing the energy landscape formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Myung-Gyun Baek, Sang-Geon Park
Summary: By introducing self-assembled monolayers, the performance of OLED devices can be improved, and the wetting properties, surface roughness, and work function of the ITO surface can be controlled. SAM-modified devices demonstrate better performance, including higher current density, brightness, and lower turn-on voltage.
Review
Energy & Fuels
Li Yang, Xiaoli Zhang, Jinbao Zhang
Summary: This paper discusses the importance of pi-conjugated polymer-functionalized semiconductor surfaces and the use of surface-confined monolayers of these polymers. The nanostructure of the monolayers is influenced by factors such as the type and position of anchor groups, polymer structure, and film-forming techniques. The applications of these monolayers in dye sensitized solar cells and polymer solar cells are summarized. Future research directions for improving the efficiency and assembly states of these monolayers are also discussed.
Article
Polymer Science
Gang Ye, Wytse Talsma, Karolina Tran, Yuru Liu, Sietske Dijkstra, Jiamin Cao, Jianhua Chen, Junle Qu, Jun Song, Maria Antonietta Loi, Ryan C. Chiechi
Summary: This paper describes the effectiveness of donor-acceptor conjugated polymers with polar side chains in dispersing and selecting semiconducting single-walled carbon nanotubes. The inclusion of polar side chains enhances the interactions between the polymer backbone and the walls of the nanotubes, resulting in enhanced wrapping and selection efficiency.
Article
Chemistry, Multidisciplinary
Yanxi Zhang, Gang Ye, Tom P. A. van der Pol, Jingjing Dong, Eveline R. W. van Doremaele, Imke Krauhausen, Yuru Liu, Paschalis Gkoupidenis, Giuseppe Portale, Jun Song, Ryan C. Chiechi, Yoeri van de Burgt
Summary: Organic electrochemical transistors (OECTs) are widely used in low power circuits, biosensors, and neuromorphic computing. However, the choice of high-performance n-type polymers for OECTs is limited. This study reports on three non-fused, planar polymer materials with increasing polar side chains, which improve the OECT performance. The research demonstrates that the performance of OECTs increases with the number of polar side chains, resulting in higher hydrophilicity and electron affinities.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yanxi Zhang, Eveline R. W. van Doremaele, Gang Ye, Tim Stevens, Jun Song, Ryan C. Chiechi, Yoeri van de Burgt
Summary: This study demonstrates a tunable sensing circuit based on a polymer mixed conductor that can locally modulate biologically relevant signals. The circuit, constructed from a complementary logic inverter and a neuromorphic memory element, achieves high classification accuracy in heartbeat anomaly detection. The high-performance material allows for straightforward fabrication and integration of more sophisticated adaptive circuits for future smart bioelectronics.
ADVANCED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Xinkai Qiu, Ryan C. Chiechi
Summary: This paper describes the fabrication of digital logic circuits using protein complexes. These circuits comprise resistors and diodes connected together using printed liquid metal electrodes. The circuits exhibit temperature-independent charge-transport and require no encapsulation. The function of the protein complexes is determined by self-assembly.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Wytse Talsma, Gang Ye, Yuru Liu, Herman Duim, Sietske Dijkstra, Karolina Tran, Junle Qu, Jun Song, Ryan C. Chiechi, Maria Antonietta Loi
Summary: This paper reports two newly synthesized narrow-band-gap conjugated polymers that can be used for sorting and discriminating semiconducting single-walled carbon nanotubes. The addition of a vinylene linker improves the structure of the conjugated polymers, leading to enhanced selectivity and charge transport properties for single-walled carbon nanotubes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Matteo Pitaro, Javier E. Sebastian Alonso, Lorenzo Di Mario, David Garcia Romero, Karolina Tran, Jane Kardula, Teodor Zaharia, Malin B. Johansson, Erik M. J. Johansson, Ryan C. Chiechi, Maria A. Loi
Summary: Recently, the poor wettability of carbazole-based self-assembled monolayers (SAMs) has hindered their application in Sn or mixed Sn/Pb perovskite solar cells. A self-assembled bilayer (SAB) consisting of a covalent monolayer and a noncovalent wetting layer is proposed as a solution. The introduction of the SAB enhances device reproducibility and processability, leading to higher efficiency and improved operational stability compared to SAM-only devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alessio Cataldo, Karolis Norvaisa, Lau Halgreen, Samantha E. Bodman, Kristin Bartik, Stephen J. Butler, Hennie Valkenier
Summary: A neutral receptor capable of transporting phosphate ions across lipid membranes has been discovered, opening possibilities for the development of transporters for various biological phosphates.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Alessio Cataldo, Matus Chvojka, Gyeongjin Park, Vladimir Sindelar, Francois P. Gabbai, Stephen J. Butler, Hennie Valkenier
Summary: Here we introduce a novel approach using a europium(iii) complex to monitor the transmembrane transport of fluoride into liposomes. By utilizing the long emission lifetime of this probe, we are able to accurately measure the transport activity of fluorescent transporters. The high sensitivity, selectivity, and versatility of this assay enable us to investigate various types of fluoride transporters and unravel their mechanisms of action.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Organic
Krystyna Maslowska-Jarzyna, Alessio Cataldo, Anna Marszalik, Ilona Ignatikova, Stephen J. Butler, Radoslaw Stachowiak, Michal J. Chmielewski, Hennie Valkenier
Summary: This study investigated the transport of bicarbonate and chloride ions by carbazoles with two amido/thioamido groups using a bicarbonate-sensitive probe. The researchers found a significant concentration dependence of the transporters. Based on insights into anion transport mechanisms, the compounds were tested for antimicrobial activity and showed a strong correlation with their ion transport properties.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Anca-Elena Dascalu, Lau Halgreen, Aaron Torres-Huerta, Hennie Valkenier
Summary: Dynamic covalent chemistry has been widely used for applications requiring stability of covalent bonds and the ability to exchange building blocks. In this study, azines are introduced as a dynamic covalent functional group that combines the best characteristics of imines and acylhydrazones. The results demonstrate that azines are stable in the presence of water and that dynamic combinatorial libraries of azines and aldehydes equilibrate in less than an hour.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
A. Rahimichatri, J. Liu, F. Jahani, L. Qiu, R. C. Chiechi, J. C. Hummelen, L. J. A. Koster
Summary: This paper introduces a simple conductivity measurement method to determine the cause of poor doping when the dopant is a salt. By tracking the changes in conductivity over time when applying a bias voltage, it is possible to identify the presence of unwanted ions in the film. Numerical simulations and experimental results demonstrate the feasibility of this approach.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Sylvia Rousseva, Benedito A. L. Raul, Felien S. van Kooij, Alexey V. Kuevda, Srikanth Birudula, Jan C. Hummelen, Maxim S. Pshenichnikov, Ryan C. Chiechi
Summary: This study investigates the relationship between the optical properties of C-70 derivatives and [70]PCBM and the dielectric constant, and finds that the synthetic strategies have an impact on the properties of these organic semiconductors. The results show that organic semiconductors with a higher dielectric constant have significant differences in performance between traditional photovoltaic devices and neat films.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Anurag Singh, Aaron Torres-Huerta, Tom Vanderlinden, Nathan Renier, Luis Martinez-Crespo, Nikolay Tumanov, Johan Wouters, Kristin Bartik, Ivan Jabin, Hennie Valkenier
Summary: This study demonstrates the anion binding and anion transport properties of a series of calix[6]arenes decorated with halogen bond or hydrogen bond donating groups on their small rim. The results show that the halogen bond donating iodotriazole groups enable highly selective transport of chloride and nitrate anions, without the transport of protons or hydroxide.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Nahid Torabi, Sylvia Rousseva, Qi Chen, Ali Ashrafi, Ahmad Kermanpur, Ryan C. Chiechi
Summary: This paper describes the use of reduced graphene oxide decorated with gold nanoparticles to improve the performance of solid-state biophotovoltaic cells containing photosystem I. The combination of reduced graphene oxide with gold nanoparticles can tailor the electronic structure and alignment of energy levels, as well as enhance charge-transfer across interfaces.
Article
Chemistry, Physical
Marco Carlotti, Saurabh Soni, Andrii Kovalchuk, Sumit Kumar, Stephan Hofmann, Ryan C. Chiechi
Summary: This paper presents a simple model for comparing the degree of electronic coupling between molecules and electrodes across different large-area molecular junctions. The model demonstrates its generalizability by comparing various junctions and can predict the differences in charge transport and rectification mechanisms. It provides useful insights for the design of new molecular motifs by synthetic chemists.
ACS PHYSICAL CHEMISTRY AU
(2022)
