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
Chemistry, Multidisciplinary
Aurimas Narkevicius, Richard M. Parker, Jordi Ferrer-Orri, Thomas G. Parton, Zihao Lu, Gea T. van de Kerkhof, Bruno Frka-Petesic, Silvia Vignolini
Summary: This study demonstrated the fabrication of chitin-based films with tunable reflection color by controlling the preparation conditions of chitin nanocrystals.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Tomas Javorskis, Tomas Rakickas, Alberta Jankunaite, Martynas Talaikis, Gediminas Niaura, Arturas Ulcinas, Edvinas Orentas
Summary: The method involves a simple process for deprotecting N-Boc on surfaces, allowing for meso-scale patterning and additional synthetic modifications. Chemical patterning is achieved using micro-drop equipment and water on heated self-assembled monolayers.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Multidisciplinary
Zijiao Zhang, Ni Kou, Weilong Ye, Shuo Wang, Jiaju Lu, Yun Lu, Huiying Liu, Xiumei Wang
Summary: In this study, antimicrobial peptides were self-assembled on gold substrates to form good antibacterial surfaces with stable antibacterial behavior. The grafted AMPs showed potential as a novel therapeutic method for the treatment of implanted biomaterial infections, with good biocompatibility and enhanced bactericidal performance.
Article
Nanoscience & Nanotechnology
Zachary Blanchette, Daniel K. Schwartz, J. Will Medlin
Summary: Controlling reactant adsorption on catalyst surfaces is crucial for reaction activity and selectivity. This study used thiol self-assembled monolayers (SAMs) to control activity and selectivity via steric effects. The successful deposition of homogeneous low-density SAMs on the metal surface was demonstrated, and the SAM density significantly influenced reaction activity and selectivity. The low-density SAMs improved reaction rates and showed potential for size-selective reaction control.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Iris Berg, Luca Schio, Justus Reitz, Elena Molteni, Linoy Lahav, Carolina Gutierrez Bolanos, Andrea Goldoni, Cesare Grazioli, Guido Fratesi, Max M. Hansmann, Luca Floreano, Elad Gross
Summary: In this study, the self-assembly of N-heterocyclic olefins (NHOs) on gold surface was investigated using experimental and computational methods. It was found that NHOs can self-assemble into dimers, trimers, and tetramers, forming stable monolayers. The study also revealed that NHOs can adsorb on gold surface in a flat-lying geometry through coordination with gold adatoms, and the surface interaction can be further increased by functionalizing the backbone with methyl groups, leading to enhanced thermal stability and impact on work-function values.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Multidisciplinary
Aman Bhardwaj, Lalit M. Pandey
Summary: Hospital-acquired infections (HAIs) are a serious medical threat affecting the efficacy of existing medical infrastructure, with antibiotics contributing to multi-drug resistant bacteria and biofilm formation. Silver nanoparticles (AgNPs) based antimicrobial surfaces show potential in preventing bacterial adhesion and biofilm formation, offering a promising solution to address the issue of HAIs.
Review
Chemistry, Multidisciplinary
Hira Khalid, Lixian Tian, Xi Yu, Irshad Hussain, Wenping Hu
Summary: This review summarizes the preparation, characterization, structure modulation, and applications of mixed self-assembled monolayers (mixed SAMs) in molecular electronics. The ability to tune the intermolecular interactions and optimize charge transport in desired devices is a key advantage of SAM-based molecular devices compared to single molecular devices. The qualitative and quantitative examination of the nanoscale organization and intermolecular interactions of mixed SAMs obtained by various techniques is reviewed. The challenges of using mixed SAMs for the development of novel electronic functional devices in the future are also discussed.
Article
Chemistry, Multidisciplinary
Xiao Wang, Bing Liu
Summary: We present a unique method to synthesize patchy nanoparticles by controlling the orientation of the molecules through synchronous polymerization and crystallization. The resulting nanoparticles have uniform shapes and a single liquid crystal domain. The patchy properties can be activated or deactivated by solvents, and additional colloidal blocks can be added to create triblock patchy dumbbells with integrated optical properties. These nanoparticles demonstrate triple-mode optical authentication and can be used in anti-counterfeiting labels or patterns. Furthermore, the patchy cylinders can serve as building blocks for long liquid crystal rods or porous colloidal materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Julian M. Dlugosch, Henning Seim, Achyut Bora, Takuya Kamiyama, Itai Lieberman, Falk May, Florian Mueller-Plathe, Alexei Nefedov, Saurav Prasad, Sebastian Resch, Kai Saller, Christian Seim, Maximilian Speckbacher, Frank Voges, Marc Tornow, Peer Kirsch
Summary: This article presents a prototype of a ferroelectric tunnel junction (FTJ) based on a self-assembled monolayer (SAM) of small, functional molecules. The SAM is highly uniform and thin, and exhibits reversible conductance switching. Compared to inorganic material-based FTJs, this approach using SAMs of small organic molecules allows for a higher level of functional complexity while maintaining a robust and simple fabrication process. The technology is expected to find applications in information storage and processing.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yurou Zhang, Dohyung Kim, Jung-Ho Yun, Jongchul Lim, Min-Cherl Jung, Xiaoming Wen, Jan Seidel, Eunyoung Choi, Mu Xiao, Tengfei Qiu, Miaoqiang Lyu, E. Q. Han, Mehri Ghasemi, Sean Lim, Henry J. Snaith, Jae Sung Yun, Lianzhou Wang
Summary: By utilizing energetically vaporized CsI, a unique nanoisland structure is formed on the surface of facet-controlled cuboid MAPbI(3) single crystals, leading to improved light absorbance and charge carrier mobility, thus providing a pathway for optoelectronic applications.
ADVANCED FUNCTIONAL MATERIALS
(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, Multidisciplinary
Katarina Marusic, Ena Pezic, Nives Matijakovic Mlinaric, Pavo Dubcek, Jordi Sancho-Parramon, Damir Kralj, Branka Mihaljevic
Summary: Self-assembled monolayers (SAMs) are an important element of modern nanotechnology and surface functionalization. However, their application is limited due to their vulnerability in corrosive environments. This study demonstrates for the first time how to strongly crosslink SAMs made of non-toxic and biodegradable fatty acids on metal surfaces using ionizing radiation, resulting in stable crosslinked nanocoatings with significantly improved properties compared to SAMs. Crosslinking opens up the possibility of using SAMs in various systems and on different materials for achieving stable and durable surface properties.
Article
Biophysics
Tongtong Tian, Jia Yi, Yujie Liu, Binxiao Li, Yixin Liu, Liang Qiao, Kun Zhang, Baohong Liu
Summary: This study presents the development of highly efficient nanoparticle arrays for simultaneous capture, identification, and differentiation of bacteria using SERS technology, allowing for single-cell analysis of multiple bacterial species. The technology demonstrates high sensitivity, good reproducibility, and stability, with great potential in bacterial detection and phenotyping studies.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Thomas Auzelle, Florian Ullrich, Sebastian Hietzschold, Chiara Sinito, Stefan Brackmann, Wolfgang Kowalsky, Eric Mankel, Oliver Brandt, Robert Lovrincic, Sergio Fernandez-Garrido
Summary: The optoelectronic properties of GaN surfaces were studied after functionalization with phosphonic acid derivatives, showing significant changes in GaN work function and impacting surface band bending. The internal quantum efficiency of GaN layers and nanowires was significantly affected by the covalent bonding of phosphonic acids, with modifications to internal electric fields and surface states. Phosphonate chemistry shows potential for selective sensing applications in surface functionalization of GaN.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Anne Lehmann, Mohamed Alaasar, Marco Poppe, Silvio Poppe, Marko Prehm, Mamatha Nagaraj, Sithara P. Sreenilayam, Yuri P. Panarin, Jagdish K. Vij, Carsten Tschierske
CHEMISTRY-A EUROPEAN JOURNAL
(2020)
Article
Chemistry, Applied
Jung-Min Choi, Tian-Zi Shen, Jagdish K. Vij, Jun Hyup Lee, Jang-Kun Song
Article
Crystallography
Vitaly P. Panov, Jang-Kun Song, Georg H. Mehl, Jagdish K. Vij
Summary: The twist-bend nematic phase exhibits unique structures and properties, including fast electrooptic response, large electroclinic effect, and unusual temperature-dependent birefringence pattern. This phase also presents intriguing phenomena such as variations in optical properties with temperature and stripe patterns in liquid crystal cells.
Article
Chemistry, Physical
Sithara P. Sreenilayam, Neelam Yadav, Yuri P. Panarin, G. Shanker, Jagdish K. Vij
Summary: Experimental and theoretical investigations of the twist-bend nematic (N-TB) phase in liquid crystals have revealed its polar and chiral characteristics, as well as a large negative dielectric anisotropy, making it suitable for exploring field induced phases at lower field strengths. The orientational order parameter jumps at the N-N-TB transition temperature during the liquid crystal phase transition process.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Neelam Yadav, Yuri P. Panarin, Jagdish K. Vij, Wanhe Jiang, Georg H. Mehl
Summary: A non-chiral ferroelectric nematic compound called DIO was studied using dielectric spectroscopy. The compound exhibits three nematic phases on cooling, namely the ordinary paraelectric nematic N, the intermediate nematic NX, and the ferroelectric NF phase. The compound shows two collective relaxation processes, P1 and P2, with P2 originating from polar/chiral molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Crystallography
Neelam Yadav, Yuri P. Panarin, Wanhe Jiang, Georg H. Mehl, Jagdish K. Vij
Summary: In this study, nematic-nematic transitions in a highly polar nematic compound were investigated using dielectric spectroscopy. The compound exhibited three nematic phases: ubiquitous nematic N, high polarizability N-X, and ferroelectric nematic N-F, as it cooled from the isotropic phase. Two collective processes, namely P-1 and P-2, were observed. The dielectric strength and relaxation frequency of P-2 were found to depend on the thickness of the cell.
Article
Physics, Fluids & Plasmas
Koichiro Shirota, Atsuo Fukuda, Neelam Yadav, Vitaly P. Panov, Jagdish K. Vij, Yutaka Yamagata, Ken Ishikawa
Summary: The response to an applied electric field in the qT = 1/2 subphase of the MC881-MC452 binary mixture system is studied. In the ordinary antiferroelectric SmCA* and 1/2 (sub)phases, induced polarization occurs and the tilt plane aligns parallel to the field. However, in the 1/2 subphase, the helix resists deformation and a threshold-like increase of birefringence occurs in the transition to unwound SmC* at a field of less than 0.5 V/µm.
Article
Chemistry, Physical
Neelam Yadav, Yuri P. Panarin, Wanhe Jiang, Georg H. Mehl, Jagdish K. Vij
Summary: The achiral compound DIO, which exhibits three nematic phases, has been studied in confinement under different surface conditions using polarizing microscopy and electro-optics. The high temperature N phase shows optical activity and linear electro-optic response, which can be attributed to its polar nature. Chiral domains are formed due to spontaneous symmetry breaking caused by saddle-splay elasticity, leading to the formation of helical domains with opposite chirality. This is the first observation of helical segregation in calamitic non-chiral molecules in the nematic phase. The ferronematic N-F shows strong polar azimuthal surface interaction energy, resulting in a homogeneous structure in planar aligned cells and a twisted structure in cells with antiparallel buffing. The observed agreement between experimental and simulated transmission spectra confirms the presence of twisted structures in antiparallel rubbed cells.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
A. S. Titov, S. Titov, J. K. Vij
Summary: This study examines the experimental results of the complex dielectric permittivity of aliphatic ketones in dilute solutions of inert solvent cyclohexane in the GHz and THz frequencies. The theory of inertial anomalous diffusion of polar molecules is used to explain the results, showing a good fit between experimental data and the theoretical model.
Article
Crystallography
Yuri P. Panarin, Carsten Tschierske, Jagdish K. Vij
Summary: This paper discusses the nature of different biaxial phases and their switching mechanisms within the liquid crystalline community, aiming to apply them in display and photonics. The elusive goal of discovering biaxial nematic liquid crystals for fast switching has proven challenging. Ferroelectric and antiferroelectric liquid crystals discovered in 1975 and 1989 have been used for high-resolution applications but faced alignment and recovery issues.
LIQUID CRYSTALS TODAY
(2021)
Article
Physics, Fluids & Plasmas
Atsuo Fukuda, Jagdish K. Vij, Yoichi Takanishi
Summary: By recalculating phase diagrams and studying the distorted helical structures of biaxial subphases, a better understanding of the phenomena was achieved. Regular and irregular subphase emerging sequences were identified, highlighting inconsistencies with previous experimental results and the need for further investigation and resolution.
Article
Physics, Multidisciplinary
Yu P. Panarin, S. P. Sreenilayam, V Swaminathan, C. Tschierske, J. K. Vij
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Fluids & Plasmas
Zhengyu Feng, Vigneshwaran Swaminathan, Vitaly P. Panov, Atsuo Fukuda, Ken Ishikawa, Jagdish K. Vij
Article
Materials Science, Multidisciplinary
V. Swaminathan, V. P. Panov, A. Panov, D. Rodriguez-Lojo, P. J. Stevenson, E. Gorecka, Jagdish K. Vij
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Marco Poppe, Mohamed Alaasar, Anne Lehmann, Silvio Poppe, Maria-Gabriela Tamba, Marharyta Kurachkina, Alexey Eremin, Mamatha Nagaraj, Jagdish K. Vij, Xiaoqian Cai, Feng Liu, Carsten Tschierske
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
