Article
Chemistry, Organic
Julian Simke, Tom Boesking, Bart Jan Ravoo
Summary: The bidirectional photoswitching of arylazopyrazoles with visible light is achieved by incorporating pyrrolidine and piperidine in the ortho-position of the phenyl ring, leading to red-shifted absorption maxima and increased molar absorption coefficients. This allows for E -> Z isomerization with blue light (λ = 465 nm) and Z -> E isomerization with red light (λ = 600 nm). N-methylation of the pyrazole results in excellent thermal stability of the Z isomer.
Article
Chemistry, Physical
S. Grebenkin, V. M. Syutkin
Summary: This study reveals that the polymer environment influences the reorientation of azobenzene molecules in poly(ethyl methacrylate) film doped with Disperse Red 1 under light irradiation. In confined environments, the environmental changes due to isomerization attempts lead to the reorientation of azobenzene molecules.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Fanxi Sun, Dongsheng Wang
Summary: Photoresponsive materials offer the advantages of being controlled by light in a non-contact, efficient, and precise manner, making them attractive for various applications. However, the isomerization of photoresponsive molecules in the solid state is hindered due to intermolecular aggregation. This perspective discusses the potential of different photoresponsive molecules to switch in the solid state and highlights recent strategies for promoting fast and efficient isomerization.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Biomaterials
Elena Romero-Ben, M. Carmen Castillejos, Cristian Rosales-Barrios, Maria Exposito, Pilar Ruda, Paula M. Castillo, Stefania Nardecchia, Juan de Vicente, Noureddine Khiar
Summary: In this study, a divergent synthetic approach for the fabrication of stimuli-responsive biomaterials, including spherical micelles and 1D-glyconanotube-based photoresponsive gels, was presented. The resulting nanostructures demonstrated reversible gel-sol transition upon UV irradiation and enabled spatio-temporal control of adhesion and release. Additionally, the micelles and gels showed potential use as nanocontainers for drug loading and controlled release.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Environmental Sciences
Fuad Ameen, Turki M. Dawoud, Fatimah Alshehrei, Khawla Alsamhary, Abobakr Almansob
Summary: This study evaluated the degradation ability of indigenous Aspergillus strains on azo dyes in wastewater, finding that these strains can effectively degrade azo dyes under optimal conditions.
Article
Biochemistry & Molecular Biology
Eduardo Pino, Cristian Calderon, Piero Castro
Summary: The photoinduced degradation of the azo dye Disperse Red 1 was studied in a microheterogeneous system comprising titanium oxide (TiO2) and sodium dodecyl sulfate, exposed to UV light. The degradation was enhanced in the vicinity of the surfactant critical micelle value, but further increase in surfactant concentration led to a loss in photodegradation performance. The surfactant's influence can be explained by two different phenomena, affecting the interaction of hydroxyl radicals with the dye and limiting the active sites on the TiO(2) surface.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Zoya Ghorbanishiadeh, Bojun Zhou, Morteza Sheibani Karkhaneh, Rebecca Oehler, Mark G. Kuzyk
Summary: This work investigates the impact of azobenzene dye Disperse Red 1 (DR1) doping and annealing on the thermomechanical and photomechanical properties of poly(methyl methacrylate) (PMMA) fibers. The study reveals that doping with DR1 increases the stiffness and glass transition temperature (T-g) of the PMMA fibers. Additionally, annealing below T-g reduces Young's modulus and increases T-g. The dominant mechanism for the photomechanical response is determined to be photothermal heating, with the effect of photoisomerization being negligible. Temperature-dependent photomechanical efficiencies are also analyzed.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
K. C. Sushma, R. B. Basavaraj, D. P. Aarti, M. B. Madhusudana Reddy, G. Nagaraju, M. S. Rudresha, H. M. Suresh Kumar, K. N. Venkatachalaiah
Summary: Intense red light emitting SrZrO3:Eu3+ nanopowders were successfully fabricated using a low-cost eco-friendly hydrothermal route with Aloe vera gel as a surfactant. The nanopowders exhibited a pure single-phase tetragonal structure with no impurity peaks. The energy band gap was calculated to be around 3.98 - 4.27 eV and the particle size was observed to be approximately 42 nm. The powders showed intense red emission under excitation at 395 nm and exhibited good luminescence properties.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Energy & Fuels
Sudhir D. Jagdale, Chepuri R. K. Rao, Sidhanath Bhosale, Sheshanath Bhosale
Summary: In this study, neurotransmitter dopamine (DP) and natural amino acid L-tyrosine (Tyr) conjugate functionalized naphthalene diimide (NDI) based electrode materials were designed and synthesized for supercapacitor (SC) electrodes. The resulting electrode material NDI-Tyr-DP in combination with graphite foil (GF) exhibited higher specific capacitance and energy density, making it a promising candidate for energy storage devices in microelectronic areas.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Ridha Lafi, Lotfi Abdellaoui, Imed Montasser, Walid Mabrouk, Amor Hafiane
Summary: The study investigated the effect of the head group structure of surfactant on the adsorption of methyl red onto modified coffee residues. The results showed that zwitterionic surfactant was the most efficient for the adsorption of methyl red.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Multidisciplinary
Manoj M. Mhatre, Anuja Katariya-Jain, R. R. Deshmukh
Summary: In this study, dispersed dye red 1 (DR1) and carbon nanoparticles (CNPs) were separately doped into polymer dispersed liquid crystal films (DPDLC and CPDLC). The effect of DR1 and CNPs on the film properties was investigated, including LC droplet size, transition temperature, voltage-transmittance characteristic, contrast ratio, response time, haze, and dielectric measurements. The results showed that the addition of 0.05% wt./wt. of DR1 or CNPs reduced the threshold voltage of the film and improved the contrast and response time. Dielectric analysis revealed a Debye type relaxation mode in the films.
Article
Chemistry, Analytical
Xiang Li, Xiu Yan, Conghui Wang, Yunxiao Ma, Yi Jiang, Rongjing Wang, Dongyang Shi, Zhongjian Li, Guifen Zhu, Bing Tan
Summary: This study successfully synthesized red emission carbon dots with tunable functional groups and further investigated their properties. It was found that the fluorescence of the carbon dots could be effectively quenched by Fe3+. By utilizing the carbon dots as a nanoprobe, a fluorescence sensor for dual-detection of Fe3+ and PPi was developed and successfully applied in real sample detection. Additionally, an IMPLICATION logic gate was designed.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yoonseok Ko, Minsang Kim, Changho Noh, Mi-Jeong Kim, Keechang Lee, Jongback Kim, Sung Dug Kim, Sang Soo Jee
Summary: Flow chemistry was utilized to fabricate a bulky tirethoxysilane-modified Disperse Red 1 chromophore (TES-DR1) with high product yield, altering the reaction mechanism at high temperatures and achieving uniaxial alignment of chromophores through hybridization and electric-field poling. Despite the polymer matrix allowing chromophores to move randomly at the glass transition temperature, the EO behavior remained stable even after a thermal stability test at 225 degrees C, indicating the effective confinement of TES-DR1 within the stable hybrid framework.
JOURNAL OF FLOW CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Haiqing Qiu, Huajun Sun, Xiaofang Liu, Huiting Sui, Duanping Huang
Summary: 3-1-type porous lead zirconate titanate ceramics and composites with special structure were fabricated by freeze-casting, showing excellent piezoelectric, dielectric, and acoustic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Shireesha Manturthi, Kumar Pranav Narayan, Srilakshmi V. Patri
Summary: This study employed amino acid-based cationic lipids as nanocarriers for gene transfection in cancer and non-cancer cells. It was found that the proline-based lipid showed superior gene delivery activity and cellular internalization compared to methionine-based and serine-based lipids.
Article
Chemistry, Multidisciplinary
Hongshuang Guo, Arri Priimagi, Hao Zeng
Summary: Snapping is a sudden reaction achieved through the release of prestored elastic energy, allowing structures to switch rapidly from one form to another. Recent advances in responsive materials research have led to the development of bioinspired snappers and fast-moving soft robots triggered by external stimuli. However, there are challenges in controlling snapping dynamics, such as onset timing and motion speed.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Kim Kuntze, Jani Viljakka, Evgenii Titov, Zafar Ahmed, Elina Kalenius, Peter Saalfrank, Arri Priimagi
Summary: In this study, a library of easily accessible o-aminofluoroazobenzenes was synthesized and their structure-property relationships regarding spectral qualities, visible light isomerization efficiency, and thermal stability were established. The experimental results were rationalized with quantum chemical calculations, providing insight into the nature of low-lying excited states and thermal isomerization. The synthesized azobenzenes exhibited absorption at up to 600 nm and thermal cis-lifetimes ranging from milliseconds to months.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Biagio Audia, Chiara Fedele, Caterina M. Tone, Gabriella Cipparrone, Arri Priimagi
Summary: Azobenzene-based light-responsive thin films show potential as smart cell-culture substrates due to their reversibly photo-patterned feature. This study investigates the surface stability of these films in water and a biologically relevant aqueous medium, revealing the blistering phenomenon caused by water-material interaction. The blistering can be prevented by changing the substrate, applying an additional coating layer, or controlling film permeability using light. The orientation of blisters can also be controlled with polarized light. A simple model based on osmotic pressure is proposed to explain blister formation.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Zixuan Deng, Hang Zhang, Arri Priimagi, Hao Zeng
Summary: This study reports an optically powered soft material strip that can perform nonreciprocal, cilia-like, self-sustained oscillation under water. The actuator is made of planar-aligned liquid crystal elastomer responding to visible light. Two laser beams from orthogonal directions allow for piecewise control over the strip deformation, enabling two self-shadowing effects coupled in one single material to yield nonreciprocal strokes. The results demonstrate autonomous microfluidic pumping, translocation of a micro-object, and coupling between two oscillating strips through liquid medium interaction, offering new concepts for non-equilibrium soft actuators that can perform bio-like functions under water.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Hongshuang Guo, Rakesh Puttreddy, Turkka Salminen, Alons Lends, Kristaps Jaudzems, Hao Zeng, Arri Priimagi
Summary: The authors report a liquid crystalline network that contains dynamic halogen-bond crosslinks and possesses reversible thermo-responsive shape memory behavior. Shape programming can be achieved through human-hand operation, and a micro-robotic injection model is proposed to achieve complex shape morphing in aqueous media.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Qing Liu, Yu Zhou, Ahmed Shaukat, Zhuojun Meng, Daniella Kyllonen, Iris Seitz, Daniel Langerreiter, Kim Kuntze, Arri Priimagi, Lifei Zheng, Mauri A. Kostiainen
Summary: In this article, a light-controlled protein crystal is introduced, which is obtained by complexing the model proteins with cationic azobenzene dyes. The crystalline state can be switched to a dispersed phase under ultraviolet light and restored by visible-light illumination, and this switching can be repeated without structure deterioration. This approach significantly increases the crystallinity and enables the formation of protein single crystals. It offers a method for fabricating optically controlled crystallization and studying metamaterials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Klaudia Dradrach, Michal Zmyslony, Zixuan Deng, Arri Priimagi, John Biggins, Piotr Wasylczyk
Summary: Researchers demonstrate the use of light-driven pumping for small-scale manipulation of microlitre volumes of liquid using a liquid crystal elastomer strip. Optofluidics, which utilizes light for power and control, offers the potential for small, self-contained microfluidic devices that are more efficient and simpler to operate.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Matias Paatelainen, Markus Lahikainen, Alex Berdin, Kim Kuntze, Werner M. Nau, Nonappa, Arri Priimagi
Summary: Supramolecular host-guest complexes are dynamic systems consisting of macrocyclic host molecules encapsulating smaller guest molecules, and can be used to tackle fluorescence quenching and photobleaching. This study demonstrates the application of supramolecular host-guest complexation in a hydrogel network to create tunable hydrogel-based lasers. By doping hydrogel with cucurbit[7]uril as a host molecule, the fluorescent quantum yield and photostability of Rhodamine B molecules in the hydrogel are significantly improved. A thin-film distributed feedback hydrogel laser with wavelength tunability is fabricated to showcase the concept. These findings, combined with the stimuli-response of hydrogels, open up possibilities for affordable and small-scale photonic devices for sensing applications.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Natalie P. Pinchin, Hongshuang Guo, Henning Meteling, Zixuan Deng, Arri Priimagi, Hamed Shahsavan
Summary: Soft robots, composed of compliant materials like liquid crystal networks (LCNs), offer high adaptability and safer interaction with humans. However, the relationship between LCNs and water poses limitations in aquatic environments. This review examines this relationship, surveys existing literature on LCNs as aquatic soft robots, and discusses potential paths forward.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kim Kuntze, Daisy R. S. Pooler, Mariangela Di Donato, Michiel F. Hilbers, Pieter van der Meulen, Wybren Jan Buma, Arri Priimagi, Ben L. Feringa, Stefano Crespi
Summary: We introduce a new class of visible-light-driven molecular motors based on barbituric acid, which possess a tertiary stereogenic center with a hydroxy group due to an unexpected reactivity during synthesis. Experimental and computational studies reveal that these motors operate similarly to existing overcrowded alkene-based molecular motors, with a sub-picosecond excited-state isomerization facilitated by a hydrogen bond between the hydroxy group and the carbonyl groups. Computational simulations predict a high quantum yield of isomerization (68%) through an excited state lasso mechanism.
Article
Chemistry, Multidisciplinary
Kim Kuntze, Jani Viljakka, Matti Virkki, Chung-Yang (Dennis) Huang, Stefan Hecht, Arri Priimagi
Summary: By simple synthetic derivatisation, indigo dye can be converted into a red-light E-Z photoswitch, which exhibits negative photochromism and tuneable thermal isomerisation kinetics. This makes indigo derivatives highly attractive for materials and living systems applications. However, the translation of indigo photoswitching dynamics from solution to solid state, which is crucial for most applications, is not well understood. In this study, the photoswitching performance of six structurally distinct indigo derivatives in five polymers of varying rigidity is investigated. Three key strategies are identified to enable efficient photoswitching under red light: choosing a soft polymer matrix, creating free volume around the indigo molecules, and applying low dye loading to inhibit aggregation. Implementation of these strategies leads to isomerisation performance nearly identical to that in solution, paving the way for designing new red-light photochromic materials based on indigos.
Article
Chemistry, Multidisciplinary
Heidi Peussa, Chiara Fedele, Huy Tran, Mikael Marttinen, Julia Fadjukov, Elina Maentylae, Arri Priimaegi, Soile Nymark, Teemu O. Ihalainen
Summary: Epithelial cells interact with their extracellular environment through continuous biochemical and physical interactions, which guide physiological processes. This study demonstrates that light-responsive materials can modify the physical niche of cells and trigger rapid intracellular calcium transients. Moreover, the research reveals that the mechanosensitive cation channel Piezo1 plays a major role in generating these transients after nanoscale mechanical deformation. The findings also show that Piezo1 preferentially responds to shear deformation at the cell-material interphase rather than absolute topographical changes of the substrate.
Article
Biochemistry & Molecular Biology
Chiara Fedele, Tero-Petri Ruoko, Kim Kuntze, Matti Virkki, Arri Priimagi
Summary: Azobenzenes are versatile photoswitchable molecules with powerful photochemical properties. Recent research has focused on their applications in areas such as chemical sensing, organic transistors, and cell signaling.
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Mari Isomaki, Chiara Fedele, Lotta Kaariainen, Elina Mantyla, Soile Nymark, Teemu O. Ihalainen, Arri Priimagi
Summary: In this study, a dynamic cell culture platform is developed to mimic the interaction between cells and extracellular matrix using a light-responsive azobenzene molecular glass film. The platform allows reversible photomodulation of surface relief gratings, which can guide epithelial cell orientation. The platform can also be patterned with proteins by microcontact printing, enabling biofunctionalization. This study paves the way for dynamically controlling cell-material interactions.
Article
Materials Science, Multidisciplinary
Essi Taipale, Nikita A. Durandin, Jagadish K. Salunke, Nuno R. Candeias, Tero-Petri Ruoko, Jas S. Ward, Arri Priimagi, Kari Rissanen
Summary: The development of purely organic fluorescence emitters is crucial for their cost-effectiveness and high performance. In this study, the effect of protonation on the fluorescence of various pyridine-functionalised carbazole-based bipolar host materials was investigated. The results showed that protonation led to an increase in the fluorescence quantum yield, and the J-type packing of the molecules further facilitated this increase.
MATERIALS ADVANCES
(2022)
Article
Materials Science, Multidisciplinary
Mengjiao Dong, Liyun Liao, Chensheng Li, Yingxiao Mu, Yanping Huo, Zhong-Min Su, Fushun Liang
Summary: This study investigates the influence of the polarity of polymer matrices on persistent room-temperature phosphorescence (pRTP). It is discovered that intense phosphorescence emission can be achieved in highly polar matrices such as polyacrylic acid (PAA). The dipole-dipole interaction between the polar fluorophore and polar matrix is proposed to stabilize the excited state and facilitate the generation of efficient room-temperature phosphorescence emissions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Han-Jiang Yang, Weijia Xiang, Xiangzhou Zhang, Jin-Yun Wang, Liang-Jin Xu, Zhong-Ning Chen
Summary: This article reports a 2D copper(I)-based cluster material for X-ray imaging, which exhibits ultra-high spatial resolution, high photoluminescence efficiency, and low detection limit. The material shows excellent linear response to X-ray dose rates and light output, and has the best spatial resolution among reported lead-free metal halide hybrids.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Review
Materials Science, Multidisciplinary
Taek Joon Kim, Sang-hun Lee, Dayeong Kwon, Jinsoo Joo
Summary: Donor-acceptor heterostructures using organic-inorganic halide perovskites, two-dimensional transition metal dichalcogenides, pi-conjugated organic small/macro molecules, and quantum dots are promising platforms for exciton-based photonics and optoelectronics. Hetero-interlayer excitons and hetero-intermolecular excitons formed through optical and/or electrical charge transfer in various heterostructures are important quasi-particles for light emission, detection, and harvesting systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Liemao Cao, Xiaohui Deng, Zhen-kun Tang, Rui Tan, Yee Sin Ang
Summary: We investigate the interface properties between WSi2N4 and Mo2B, O-modified Mo2B, and OH-modified Mo2B nanosheets. We find that WSi2N4 and Mo2B form n-type Schottky contacts, while functionalizing Mo2B with O and OH leads to the formation of both n-type and p-type ohmic contacts with WSi2N4. Additionally, we demonstrate the emergence of quasi-ohmic contact with ultralow lateral Schottky barrier and zero vertical interfacial tunneling barriers in Mo2B(OH)2-contacted WSi2N4.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ga Eun Kim, Hae-Jin Kim, Heesuk Jung, Minwoo Park
Summary: This study presents a solution to the commercialization challenges of flexible LEDs based on MAPbBr(3) by incorporating polyurethane and an In-Ga-Zn-Sn liquid alloy. The designed devices showed high flexibility, efficiency, and durability, with improved electron injection and reduced defects, making them promising for next-generation displays.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tao Shen, Zeng Wu, Zhen Jiang, Dongsheng Yan, Yan Zhao, Yang Wang, Yunqi Liu
Summary: Sidechain engineering is an important molecular design strategy for tuning the solid-state packing and structural ordering of conjugated polymers. The effects of sidechain direction on the optoelectronic properties of polymers and device performance were systematically investigated in this study. The results demonstrate that tuning the sidechain substitution direction can effectively improve the molecular structure and light absorption properties of polymers, providing new insights for the rational design of functional polymers.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Lotte Clinckemalie, Bapi Pradhan, Roel Vanden Brande, Heng Zhang, Jonathan Vandenwijngaerden, Rafikul Ali Saha, Giacomo Romolini, Li Sun, Dirk Vandenbroucke, Mischa Bonn, Hai I. Wang, Elke Debroye
Summary: In this study, a facile strategy using a non-conductive polymer was proposed to fabricate stable, pinhole-free thick films. The effect of introducing a second phase into CsPbBr3 perovskite crystals on their photophysical properties and charge transport was investigated. The dual phase devices exhibited improved stability and more effective operation at higher voltages in X-ray detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jingye Zou, Shenglan Hao, Pascale Gemeiner, Nicolas Guiblin, Omar Ibder, Brahim Dkhil, Charles Paillard
Summary: When rare-earth ions are embedded in a ferroelectric material, their photoluminescence can serve as an all-optical probe for temperature, electric field, and mechanical stimulus. However, the impact of ferroelectric phase transitions on photoluminescence is not well understood. In this study, we demonstrate changes in the photoluminescence of green emission bands during critical ferroelectric transitions in an Er-doped BaTiO3 material. We also find that the intensity ratio and wavelength position difference of sub-peaks provide information on the phase transitions.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Jiangchao Han, Daming Zhou, Wei Yang, Chen Lv, Xinhe Wang, Guodong Wei, Weisheng Zhao, Xiaoyang Lin, Shengbo Sang
Summary: Rare type-II spin-gapless semiconductors (SGSs) have attracted increasing attention due to their unique spin properties. In this study, the interface contacts and spin transport properties of different devices composed of VSi2P4 ferromagnetic layers were investigated. The results show that VSi2P4 is a promising material for designing vertical van der Waals heterostructures with a giant tunnel magnetoresistance (TMR) in spintronic applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Tianqi Zhao, Renagul Abdurahman, Qianting Yang, Ruxiangul Aiwaili, Xue-Bo Yin
Summary: In this study, we designed and prepared Cr and Ba-doped gamma-Ga2O3 nanoparticles to achieve near-infrared emission and enhance the emission intensity. The emission mechanism was proposed based on the trap depth, band gap, and energy levels of Cr ions. The ratiometric temperature sensing and encryption information transfer demonstrated the potential applications of this technology.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar, Chandan Mazumdar
Summary: In this study, a new spin-gapless semiconductor material CoFeMnSn is reported, and its stable structure and spin-polarized band structure are determined through experimental realization and theoretical calculations. The compound exhibits a high ferromagnetic transition temperature, making it excellent for room temperature applications. The nearly temperature-independent resistivity, conductivity, and carrier concentration of the compound, adherence to the Slater-Pauling rule, and the high intrinsic anomalous Hall conductivity achieved through hole doping further confirm its spin-gapless semiconductor nature. Additionally, the compound's SGS and topological properties make it suitable for spintronics and magneto-electronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Ikumi Aratani, Yoji Horii, Yoshinori Kotani, Hitoshi Osawa, Hajime Tanida, Toshiaki Ina, Takeshi Watanabe, Yohko F. Yano, Akane Mizoguchi, Daisuke Takajo, Takashi Kajiwara
Summary: In this study, two-dimensional arrays of single-molecule magnets (SMMs) based on metal-organic frameworks (MOFs) were systematically modified through Langmuir-Blodgett methods and chemical modifications. The introduction of bulky alkoxide groups induced structural changes and perpendicular magnetic anisotropy. This research provides a promising strategy for the construction of high-density magnetic memory devices using molecular spintronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Zonghao Lei, Houhe Dong, Lijie Sun, Bing Teng, Yanfei Zou, Degao Zhong
Summary: Researchers have successfully developed four different up-conversion phosphors based on the Eulytite-type host Ba3Yb(PO4)(3). The optical temperature sensing properties of these phosphors were thoroughly investigated, and it was found that Ba3Yb(PO4)(3):Tm/Er/Ho showed potential for optical temperature measurement applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
C. Roncero-Barrero, M. A. Carvajal, J. Ribas-Arino, I. de P. R. Moreira, M. Deumal
Summary: This study computationally investigates the conductivity of four isostructural compounds with different Se contents, and reveals the parameters that define their conductivity in stable organic radical materials. The results provide insights into the influence of Se content on the conductivity and highlight the importance of considering multiple parameters in understanding the trends in conductivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Article
Materials Science, Multidisciplinary
Remi Arras, Kedar Sharma, Lionel Calmels
Summary: In this study, we investigated the interplay between structural defects in NiFe2O4, showing that the complex formed by a Ni-Oh/Fe-Td-cation swap and a neutral oxygen vacancy is more stable than these two isolated defects, and significantly reduces the width of the minority-spin band gap.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)