Article
Materials Science, Multidisciplinary
Xiaoming Wang, Yanfa Yan
Summary: Within the independent particle approximation, the optical activity tensor of solids is described by considering different contributions: magnetic dipole, electric quadrupole, and band dispersion terms. The calculations of transition moments for magnetic dipole and electric quadrupole are performed using a sum-over-states formulation. The study applies this formulation to investigate the optical rotation of elemental tellurium and the circular dichroism of the (6,4) carbon nanotube, as well as the optical activity of achiral crystals such as wurtzite GaN. Decomposed optical activity and calculated spectra are discussed, showing good agreement with experimental results.
Review
Materials Science, Multidisciplinary
Gaoyang Wang, Hongyu Zhang, Hua Kuang, Chuanlai Xu, Liguang Xu
Summary: Chirality exists widely in nature and is closely related to the origin of life. This paper reviews the different types of chiral nanomaterials and analyzes their chiral mechanism. It also discusses the applications of nanomaterials in chiral testing, cell differentiation, gene shearing, and biological therapy. The potentials and challenges of chiral nanomaterials in the field of biomedicine are reported, along with proposed application strategies and prospects for the future.
Article
Chemistry, Physical
Daniel Kehoe, Eric Mates-Torres, Pavel Samokhvalov, Max Garcia-Melchor, Yurii K. Gun'ko
Summary: Chirality is vital in various fields such as chemistry, biology, pharmacology, and medicine. Developing chiral nanomaterials is crucial for advancing selective and sensitive smart technology. Through ligand exchange, cysteine and L-glutathione can induce chiroptical activity in ultrathin AuAg nanomaterials, with different binding kinetics observed between the two ligands.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Wouter Heyvaert, Adrian Pedrazo-Tardajos, Ajinkya Kadu, Nathalie Claes, Guillermo Gonzalez-Rubio, Luis M. Liz-Marzan, Wiebke Albrecht, Sara Bals
Summary: Chirality in inorganic nanoparticles and nanostructures has attracted increasing scientific interest due to their ability to interact differently with circularly polarized light. Quantifying the degree of chirality in objects of nanoscale is challenging, but the authors introduce a methodology based on helical geometrical properties to quantify the helicity of complex chiral nanomaterials. They demonstrate that analyzing individual particles can provide significant insights into the origin of chiroptical properties.
ACS MATERIALS LETTERS
(2022)
Article
Physics, Multidisciplinary
Zhipeng Cao, Feng Tang, Di Wang, Xiangang Wan
Summary: The concept of topological crystalline insulators protected by crystallographic symmetries has been proposed for over ten years. Through first-principles calculations, researchers identified 67 mirror-protected TCIs and studied the corresponding topological surface states. Predicted mirror-protected TCIs are expected to provide a useful reference for experimentalists and promote realistic device applications.
NEW JOURNAL OF PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
S. Ait Jmal, M. Balli, H. Bouhani, O. Mounkachi
Summary: In this study, the influence of rare earth element on the physical properties of RVO3 compounds was investigated. The electronic and magnetic properties of these materials were studied using ab initio method. Jahn-Teller effect was found in the electronic properties, and the band gap values varied with different rare earth elements. X-ray magnetic circular dichroism was used to analyze the magnetic contributions of Ho, Er, and V atoms. The magnetic anisotropies of RVO3 were analyzed using spin orbit coupling, and different easy and hard magnetization directions were observed for different compounds. The exchange coupling between (Ho-V) was found to be greater in HoVO3, while weaker in ErVO3.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jun Jiang Luo, Hang Zhang, Hao Lin Zou, Hong Qun Luo, Nian Bing Li, Bang Lin Li
Summary: This paper investigates the regulation of cysteine on the growth of gold nanoplasmonics on exfoliated MoS2 nanosheets. The synthesis, condition optimization, formation mechanism, and plasmonic properties of Au and MoS2 dendritic nanostructures are studied. The research is important for promoting the understanding of plasmonic function and crucial chirality bioinformation.
Article
Chemistry, Multidisciplinary
Simona Bettini, Michela Ottolini, Donato Valli, Rosanna Pagano, Chiara Ingrosso, Maarten Roeffaers, Johan Hofkens, Ludovico Valli, Gabriele Giancane
Summary: Inorganic chiral nanoparticles, particularly gold chiral nanostructures, are receiving increasing attention for their unique optical properties and potential biological applications. This study successfully synthesized gold nanostructures with opposite circular dichroism signals depending on the amino acid enantiomer used during synthesis. The gold nanostructures were further decorated with penicillamine, and it was shown that both penicillamine enantiomers can be successfully bonded with both the enantiomers of the gold nanostructures without affecting their chirality. This research provides important insights into the control of chirality and surface properties in chiral nano-systems.
Article
Materials Science, Multidisciplinary
ZhenHua Li, Zhi-Ming Yu, JianHua Wei, Hong-Gang Luo
Summary: This paper investigates the properties of three different antiferromagnetic orders in the bilayer structure of CrI3 using symmetry analysis and first-principles calculations. The results show that both A-type and C-type antiferromagnetic orders exhibit significant SHG effects, while the SHG effect vanishes for G-type antiferromagnetic order. The SHG components of A-type and C-type antiferromagnetic orders are mutually exclusive and sensitive to the spin-orbit coupling effect.
Article
Materials Science, Multidisciplinary
Sang Won Im, Eunjeong Jo, Ryeong Myeong Kim, Jeong Hyun Han, Ki Tae Nam
Summary: The symmetry of gold nanoparticles is closely related to their chiroptical responses. By inducing single or multiple twin planes in seed nanoparticles, the symmetry of gold nanoparticles can be modulated. 32-symmetric chiral gold nanoplates, referred to as 32 helicoids, are successfully synthesized and their growth mechanism is analyzed. This investigation provides an important insight into symmetry control in chiral plasmonic applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Andreas Peil, Pengfei Zhan, Xiaoyang Duan, Roman Krahne, Denis Garoli, Luis M. Liz-Marzan, Na Liu
Summary: In this study, a transformable plasmonic helix system is demonstrated, where multiple gold nanoparticles (AuNPs) can be directly transported to target positions using DNA swingarms, resulting in tailored optical responses.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Fang Sun, Qing Tang
Summary: Alkynyl groups have attracted attention as alternative ligands to thiolates for protecting metal nanoclusters. Density functional theory calculations revealed that alkynyl/gold interfaces prefer staple motifs, while silver and copper interfaces favor bridging motifs.
Article
Chemistry, Medicinal
Karolina Kulig, Zuzanna Denisiuk, Malgorzata Klosek, Aleksandra Owczarzy, Wojciech Rogoz, Lukasz Sedek, Malgorzata Maciazek-Jurczyk
Summary: Circular dichroism is an excellent and rapid method for analyzing chiral molecules. This study used CD analysis to qualitatively assess ligand binding on the surface of human serum albumin nanoparticles and revealed the interaction mechanism between the nanoparticles and cell membranes.
Article
Optics
Xuyan Deng, Junqiang Li, Lei Jin, Yilin Wang, Kun Liang, Li Yu
Summary: Chiral plexcitonic systems exhibit a novel chiroptical phenomenon and provide a new route for designing chiroptical devices. In this paper, a three-mode coupling system is proposed, which achieves tunable chiroptical response through strong coupling and is explained using the coupled oscillator model. Additionally, the tunability of the hybrid system is achieved by tuning the temperature and period.
Article
Chemistry, Physical
Vikas Tiwari, Tarak Karmakar
Summary: Monolayer-protected atomically precise nanoclusters (MPCs) are important molecules with unique structural features and diverse applications. In this study, we used molecular dynamics and enhanced sampling simulations to understand the atomistic and dynamical details of the aggregation process of Au-25(pMBA)(18) MPCs in aqueous and methanol solutions. The results showed that MPCs interact via hydrogen bonds and π-stacks between aromatic ligands to form stable dimers, oligomers, and crystals. The study also revealed the role of ligand charged state and solvent in molecular aggregation. Our work provides unprecedented molecular-level dynamical details of the aggregation process and conformational dynamics of MPCs ligands in solution and crystalline phases.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Condensed Matter
F. Sanchez-Ochoa, Francisco Hidalgo, Miguel Pruneda, Cecilia Noguez
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Chemistry, Multidisciplinary
Cercis Morera-Boado, Francisco Hidalgo, Rubi Zarmiento-Garcia, Cecilia Noguez
Summary: The stability and electronic properties of clusters with different metal atoms and ligand groups were investigated using density functional theory, showing differences in atomic geometries, energy gaps, and charge distributions. Clusters with gold staple units exhibited larger energy gaps, while sulfur atoms in ligands linked to silver and gold capping units behaved differently. The charge distribution of clusters of this size differs from other known clusters, allowing their synthesis with a variety of ligands.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Article
Chemistry, Physical
Francisco Hidalgo, Alberto Rubio-Ponce, Cecilia Noguez
Summary: The research reveals that the adsorption energy of cysteine molecules on graphene surfaces depends on the stacking region and twist angle, while the electronic properties of graphene structures remain unchanged. Additionally, twisted-bilayer graphene shows potential as an enantioselector substrate.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Elizabeth Mendoza-Sandoval, German Rodriguez-Lopez, Cesar L. Ordonez-Romero, David Ley, Naser Qureshi, Michal Urbanek, Diego Solis-Ibarra, Cecilia Noguez, Hugo A. Lara-Garcia, Giuseppe Pirruccio
Summary: Weakly coupling halide perovskite quantum dots (PeQDs) to plasmonic lattices can significantly change their photoluminescence pattern, converting the incoherent randomly oriented emitters into a spatially coherent source of polarized light. By optimizing the thickness of the perovskite layer and combining plasmonic lattices of different symmetries, simultaneous shaping of the emission pattern can be achieved, paving the way for designing solid-state lighting applications with programmable emission patterns.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Instruments & Instrumentation
David Becerril, Tiziana Cesca, Giovanni Mattei, Cecilia Noguez, Giuseppe Pirruccio, Marco Luce, Antonio Cricenti
Summary: Scattering scanning near-field optical microscopes (s-SNOMs) based on pseudoheterodyne detection and operating at ambient conditions suffer from instabilities due to variable optical path length, causing strong oscillations in the measured optical amplitude and phase. A stabilizing method based on interferometer phase control is proposed, which greatly improves image quality and allows correct extraction of optical phase and amplitude for micro and nanostructures. This stabilization method expands the measurement capabilities of s-SNOM to slowly time-dependent phenomena, increasing its technological significance and applications in heat transfer and nanoelectronics.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Environmental Sciences
Eduardo Cerecedo-Saenz, Elias Hernandez-Lazcano, Maythe J. Gonzalez-Bedolla, Juan Hernandez-avila, Raul Rosales-Ibanez, Maria del P. Gutierrez-Amador, Ariadna Sanchez-Castillo, Alberto Arenas-Flores, Eleazar Salinas-Rodriguez
Summary: This study investigates the removal of arsenic in the zinc industry through the synthesis and characterization of decomposed potassium jarosite. The results show that the amorphous FeOH structure in the decomposed jarosite can adsorb arsenic and achieve its elimination.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Nanoscience & Nanotechnology
Francisco Hidalgo, Francisco Sanchez-Ochoa, Cecilia Noguez
Summary: Understanding the modulation of electronic properties in graphene/tungsten disulfide (G-WS2) at different interlayer angles is crucial for the development of promising building blocks in two-dimensional heterostructures. By utilizing first-principles calculations and an unfolding method, G-WS2 heterostructures with four different interlayer angles were studied to decrypt the crowded-band structure in supercells. The interactions between out-of-plane orbitals from both layers result in electronic mini-gaps of varying sizes, band splittings, and band hybridizations. These electronic changes are modulated depending on the interlayer angle within a specific energy range and spatial region. Moreover, the superperiodic potential associated with moire patterns produces replicas that further modify the electronic alterations, leading to new electronic repulsions or avoided crossings. Therefore, the number and characteristics of mini-gaps are intrinsically connected to the interlayer angle. These findings are anticipated to play a crucial role in the design of electronic properties in two-dimensional heterostructures.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Pedro Roman-Taboada, Estefania Obregon-Castillo, Andres R. Botello-Mendez, Cecilia Noguez
Summary: This paper presents a systematic approach to studying the excitonic properties of twisted hBN bilayers. The Bethe-Salpeter equation is used along with single-particle tight-binding wave functions to obtain excitonic energies and wave functions. The study finds that the rotation angle has a significant impact on the excitonic energies and localizations of the wave functions.
Article
Materials Science, Multidisciplinary
Francisco Sanchez-Ochoa, Andres R. Botello-Mendez, Cecilia Noguez
Summary: The study reveals that electronic interactions between layers in graphene moire superlattices significantly impact the band structure, especially leading to discretization of energy gaps under small interlayer rotation angles. The formation of these discretized states is attributed to attractive interactions between out-of-plane orbitals from different layers, which may be relevant for explaining experimentally observed electron-phonon-assisted effects in graphene moire superlattices.
Article
Materials Science, Multidisciplinary
D. Becerril, G. Pirruccio, Cecilia Noguez
Summary: The study focuses on the vertical stacking of plasmonic lattices to manipulate the interaction among metallic nanoparticles through precise design and geometrical parameters. The optical response of the plasmonic vertical stack is analyzed using multipolar spectral representation to emphasize symmetry properties, showing strong coupling and polarization exchange.
Article
Chemistry, Physical
Alejandro Herrera-Carbajal, Ventura Rodriguez-Lugo, Juan Hernandez-Avila, Ariadna Sanchez-Castillo
Summary: The study reveals that the structural and electronic properties of silicon-germanium alloy nanotubes play a significant role in their stability and potential applications, with different types of nanotubes exhibiting variations in bandgap properties, which are influenced by the diameter of the tubes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
David Becerril, Omar Vazquez, Diego Piccotti, Elizabeth Mendoza Sandoval, Tiziana Cesca, Giovanni Mattei, Cecilia Noguez, Giuseppe Pirruccio
NANOSCALE ADVANCES
(2020)