Article
Chemistry, Physical
Valtteri Lasonen, Anton Vihervaara, Georgi Popov, Eva Tois, Lars Mester, Mohammad Karimi, Yoana Ilarionova, Reza Jafari Jam, Jonas Sundqvist, Mikko Ritala
Summary: Area-selective etching (ASE) of polymers is a novel and simple self-aligned patterning technique with potential application in semiconductor device fabrication. The polymer film is selectively decomposed on top of catalytically active materials while staying intact on catalytically inactive materials, eliminating edge placement errors and defects. This study investigates the ASE of poly(methyl methacrylate) (PMMA) using various catalytic materials in different atmospheres. The feasibility of the entire patterning process is demonstrated on a 100 nanometer scale.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Hama Nadhom, Robert Boyd, Polla Rouf, Daniel Lundin, Henrik Pedersen
Summary: The newly developed CVD method allows for area selective deposition based on the electrical resistivity of the substrate surface, simplifying the fabrication of nanoscaled electronics. By adding a thin layer of silver on the SiO2 surface, iron films can be selectively deposited in low-resistivity areas, demonstrating the potential for using electric resistivity of the substrate surface in metal-on-metal deposition.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Li Sun, Jiayue Xie, Guanglu Lei, Xianghong Liu, Jianmin Ma, Jun Zhang
Summary: TiO2@Void@SnO2 double-shell hollow nanotubes were synthesized to enhance the electrochemical properties of Sn-based anode materials, showing stable capacity and long cycling stability. The unique structure effectively accommodates volume change and prevents SnO2 pulverization.
Article
Materials Science, Multidisciplinary
Jeong-Min Lee, Seo-Hyun Lee, Jieun Oh, Woo -Hee Kim
Summary: The effects of surface modification using DEATMS molecules as alkylating agents on technologically important substrates were studied. Significantly delayed growth of ALD Ru films was observed on SiO2 and TiN compared to Si(-H) and W substrates through surface modification with DEATMS molecules. Area selective deposition of ALD Ru films on a patterned TiN/Si substrate was successfully demonstrated by applying chemo-selective inhibitory characteristics.
Article
Chemistry, Multidisciplinary
Kamila K. Mentel, Aleksei Emelianov, Anish Philip, Andreas Johansson, Maarit Karppinen, Mika Pettersson
Summary: This study demonstrates precise control of selective deposition of ZnO on graphene at low temperatures, achieved by using femtosecond laser writing technology to realize excellent deposition selectivity and maintaining the conductivity of graphene through thermal annealing.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Hwan Oh, Jung-Sik Kim, Hannah R. M. Margavio, Gregory N. Parsons
Summary: In this work, the researchers successfully achieved multi-material ASD by sequentially combining two intrinsic ASD processes. They also found that the properties of PEDOT and W ASD materials are affected by the ASD sequence. Additionally, they demonstrated the feasibility of orthogonal ASD at the nanoscale and showed that the PEDOT layer can control the lateral growth of W onto the non-growth surface.
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Philip Klement, Daniel Anders, Lukas Guembel, Michele Bastianello, Fabian Michel, Joerg Schoermann, Matthias T. Elm, Christian Heiliger, Sangam Chatterjee
Summary: Area-selective atomic layer deposition is a crucial technology in modern microelectronics, allowing material deposition only in specific areas to eliminate alignment errors. However, the control of the deposition process remains a challenge as selectivity of the no-growth areas is quickly lost. Surface modifications of the substrate strongly manipulate surface diffusion, enabling the tuning of nanostructures with tailored aspect ratios and offering new strategies in area-selective deposition processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Romel Hidayat, Hye-Lee Kim, Khabib Khumaini, Tanzia Chowdhury, Tirta Rona Mayangsari, Byungchul Cho, Sangjoon Park, Won-Jun Lee
Summary: Selective etching of silicon oxide (SiO2) against silicon (Si) using anhydrous hydrogen fluoride (HF) vapor has been studied. The density functional theory (DFT) calculation shows that SiO2 can be etched by HF at near-room temperature due to the relatively low activation energies of the fluorination steps. In contrast, the fluorinations of Si have higher activation energies, indicating negligible etching of silicon by HF in the near-room temperature process. The calculation results explain well the experimental observation of the selective etching of SiO2 against Si by HF vapor.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Coatings & Films
Kartik Sondhi, Rahul Sharangpani, Ramy Nashed Bassely Said, Joyeeta Nag, Michael Gribelyuk, Senaka Kanakamedala, Raghuveer S. S. Makala
Summary: The adoption of new materials driven by trends in device miniaturization has contributed to significant advancements in semiconductor technology. Thin-film deposition and lithographic techniques are crucial for achieving further scaling of devices. Area selective deposition is a powerful technique that can eliminate the need for multiple lithography steps, making the process more efficient.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Physical
J. I. Paez-Ornelas, H. N. Fernandez-Escamilla, H. A. Borbon-Nunez, H. Tiznado, Noboru Takeuchi, J. Guerrero-Sanchez
Summary: The study investigates the atomic layer deposition of ZnO/CNT hybrid inorganic structures, showing the chemical activation of CNTs with a carboxylic acid, followed by the formation of ZnO using DEZ and water as precursors. It highlights the energy barriers and ligand-exchange mechanisms during the deposition process, emphasizing the importance of the right functionalization agent and the role of the oxidizing agent in lowering energy barriers.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Ashley R. R. Bielinski, Ethan P. P. Kamphaus, Lei Cheng, Alex B. F. Martinson
Summary: In this study, in situ pyroelectric calorimetry and spectroscopic ellipsometry were used to investigate the surface reactions in atomic layer deposition of zirconium oxide. The results revealed that the reaction heat is dependent on factors such as growth rate, equilibrium surface hydroxylation, and extent of the reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Mattia Pasquali, Stefan De Gendt, Silvia Armini
Summary: This study demonstrates the importance of interface properties in forming dense thiol-SAM on metals, which is fundamental to a successful area selective deposition (ASD) process. Different surfaces on Cu are produced by treatment with acids or oxidizing agents, and the results show that a clean Cu surface cannot block Hf3N4 ALD, while an oxidized Cu surface can prevent up to 19 nm Hf3N4 film growth before Cu passivation is affected.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Josiah Yarbrough, Stacey F. Bent
Summary: This study explores the use of 1-nitropropane as a small molecule inhibitor for selective atomic layer deposition. The results show that 1-nitropropane selectively chemisorbs on Cu and CuOx substrates, forming a high-quality inhibition layer. A new multistep process is developed for low-temperature Al2O3 ALD, allowing sequential reapplied and etched of the SMIs. The resulting area-selective ALD process enables high selectivity and could expand selective growth schemes to temperature-sensitive substrates.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Leonid Filatov, Pavel Vishniakov, Ilya Ezhov, Ivan Gorbov, Denis Nazarov, Denis Olkhovskii, Rajesh Kumar, Shengjie Peng, Gang He, Vladislav Chernyavsky, Marina Gushchina, Maxim Maximov
Summary: This article investigates the impact of atomic layer deposition method on the growth of carbon nanotubes, and found that the initial NiO layer thickness plays a significant role in achieving intensive growth of carbon nanotubes.
Article
Chemistry, Physical
Felix Gayot, Elise Bruhat, Muriel Bouttemy, Mathieu Fregnaux, Eric De Vito, Jean-Paul Kleider, Stephane Cros, Matthieu Manceau
Summary: This study conducted a thorough interface study on the atomic layer deposition (ALD) fabricated tin dioxide (SnO2) electron selective layer (ESL). It was found that ALD-grown SnO2 ESL had limited cell efficiency compared to solution-processed SnO2 ESL. The analysis revealed an unfavorable band bending and a lack of oxygen at the ALD-grown SnO2/perovskite interface, which may be the cause of the observed performance limitations.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Thomas Paul Weiss, Ignacio Minguez-Bacho, Elena Zuccala, Michele Melchiorre, Nathalie Valle, Brahime El Adib, Tadahiro Yokosawa, Erdmann Spiecker, Julien Bachmann, Phillip J. Dale, Susanne Siebentritt
Summary: This study focuses on the open-circuit voltage improvement of Sb2Se3 thin film solar cells. It is found that post-deposition annealing can effectively reduce interface recombination, increase activation energy, and improve photoluminescence yield. Additionally, atomic layer-deposited intermediate buffer layers such as TiO2 or Sb2S3 can overcome the limitation of short-circuit current density.
PROGRESS IN PHOTOVOLTAICS
(2023)
Article
Chemistry, Multidisciplinary
Christian Nweze, Tomke E. Glier, Mika Rerrer, Sarah Scheitz, Yalan Huang, Robert Zierold, Robert Blick, Wolfgang J. Parak, Nils Huse, Michael Ruebhausen
Summary: In this study, the plasmonic gold nanoparticles injecting hot carriers into the topological insulator interface of Bi2Se3 nanoribbons were investigated using resonant Raman spectroscopy. The impact of individual gold particles with different sizes on the topological surface states and the phonon modes were resolved. The findings suggest the possibility of locally controlling the electronic properties of the topological insulator by metal nanoparticles through hot carrier injection.
Article
Physics, Applied
Marc Wenskat, Getnet Kacha Deyu, Isabel Gonzalez Diaz-Palacio, Robert H. Blick, Robert Zierold, Wolfgang Hillert
Summary: Surface modification of SRF cavities is crucial for advancing future accelerators, and one effective method is depositing multilayer superconducting and insulating materials on the inner surface. In this study, we successfully coated an SRF cavity with low-temperature insulating Al2O3 -1 and observed an improvement in surface resistance above 30 MV m(-1), likely due to enhanced oxygen diffusion during the deposition process. Our results demonstrate the suitability of ALD for providing conformal coating and modifying the properties of such devices.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Felix Hilpert, Pei-Chun Liao, Evanie Franz, Vanessa M. Koch, Lukas Fromm, Ece Topraksal, Andreas Goerling, Ana-Suncana Smith, Maissa K. S. Barr, Julien Bachmann, Olaf Brummel, Joerg Libuda
Summary: Solution-based atomic layer deposition (sALD) enables the preparation of thin films on nanostructured surfaces with precise control of film thickness and homogeneity. In this study, a sALD process was developed to deposit CuSCN films on a Si substrate using CuOAc and LiSCN precursors. The film growth behavior was characterized using AFM, NN analysis, ellipsometry, and in situ IR spectroscopy combined with DFT calculations. The results showed that CuSCN films grew as three-dimensional spherical nanoparticles on a pre-formed 2D layer, with increasing particle density and size as the cycle number increased. The film mainly consisted of the beta- CuSCN phase, along with a small fraction of the alpha-CuSCN phase and defect sites.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Anna Maria Dominic, Zhiyong Wang, Agnieszka Kuc, Petko Petkov, Khoa Hoang Ly, Thi Lam Huong Pham, Martin Kutzschbach, Yuanyuan Cao, Julien Bachmann, Xinliang Feng, Renhao Dong, Inez M. Weidinger
Summary: Molecularly defined two-dimensional conjugated metal-organic frameworks have tunable active site and bandgap designs, combining the properties of molecular and material-based electrocatalysts. Understanding the complex interplay between different metal sites and their influence on catalysis is essential for rational optimization.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Coatings & Films
Clemence Badie, Heloise Tissot, Beniamino Sciacca, Maissa K. Barr, Julien Bachmann, Christophe Vallee, Gael Gautier, Thomas Defforge, Vincent Astie, Jean-Manuel Decams, Mikhael Bechelany, Lionel Santinacci
Summary: This study focuses on optimizing TiN plasma-enhanced atomic layer deposition by using two different N-sources: NH3 and N-2. Comprehensive physicochemical characterizations were performed to understand the influence of the N-source nature, their dilution in Ar, and the plasma power on the final properties of the deposited layer. It was found that a 1:1 gas ratio of N-sources:Ar mixture, along with low flows (20 sccm), resulted in the highest growth per cycle (GPC) values. The N-2 plasma exhibited slightly slower deposition but acceptable film quality, making it a nonharmful alternative that can be further improved with optimized reactor geometry.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Chemistry, Multidisciplinary
Sonja Stefanovic, Negar Gheshlaghi, David Zanders, Ivan Kundrata, Baolin Zhao, Maissa K. S. Barr, Marcus Halik, Anjana Devi, Julien Bachmann
Summary: Area-selective atomic layer deposition (AS-ALD) is a bottom-up nanofabrication method that delivers single atoms from a molecular precursor. It offers advantages over lithography in terms of cost, resistance, and equipment prerequisites, but requires pre-patterned substrates and has limited selectivity and substrate choices. These challenges can be overcome with direct patterning using atomic-layer additive manufacturing (ALAM), which enables direct patterning instead of blanket coating. A functional thin-film transistor was created using ALAM-deposited ZnO and characterized.
Article
Nanoscience & Nanotechnology
Frauke Langer, Anggraini Utami, Jochen Kirres, Elisabeth Kra''mer, Julien Bachmann
Summary: A study investigating the influence of GD-OES parameters on graphite anodes in an argon plasma showed that increased applied voltage enhances the sputtering rate, while gas pressure variations adjust the crater shape. A set of measuring parameters that balance the crater shape and sputtering rate well was proposed. Different pulsing conditions were found to enhance the sputtering rate without significantly affecting the crater shape. Lower electrode densities resulted in a larger sputtered volume and a deeper concavity of the released crater.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xin Liu, Bowen Yang, Xin Zhou, Mingjian Wu, Erdmann Spiecker, Julien Bachmann, Frank Hauke, Andreas Hirsch, Tao Wei
Summary: In this study, we report the construction of three-dimensionally patterned graphene nano-ensembles by using a 2D-functionalization method and a molecular assembly process. The resulting quinary hybrids exhibit spatial resolution and hierarchical structure. This breakthrough lays the foundation for the development of emerging 3D-patterned graphene heterostructures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Applied
Isabel Gonzalez Diaz-Palacio, Marc Wenskat, Getnet Kacha Deyu, Wolfgang Hillert, Robert H. Blick, Robert Zierold
Summary: In this study, NbTiN thin films were grown by plasma-enhanced atomic layer deposition (PEALD) on AlN in a supercycle approach, and two different post-deposition thermal treatments were applied to improve the film quality. The optimized films achieved a highest superconducting critical temperature (Tc) of 15.9 K and a lower critical field (Hc1) of 213 mT, which surpasses the intrinsic limit of bulk Nb. These findings provide a promising starting point for the development of tailored thin films based SRF cavities.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Jonas Wawra, Kornelius Nielsch, Ruben Huehne
Summary: Substrate-induced strains can significantly affect the structural and functional properties of epitaxial thin films. By growing epitaxial Ba0.7Sr0.3TiO3 films on REScO3 substrates with smaller lattice mismatch, the quality of the films was improved compared to SrTiO3. The strain state of the functional layer depended on the substrate and thickness, leading to differences in permittivity and polarization behavior at different temperatures.
Article
Chemistry, Multidisciplinary
Carina Hedrich, Anna R. Burson, Silvia Gonzalez-Garcia, Victor Vega, Victor M. Prida, Abel Santos, Robert H. Blick, Robert Zierold
Summary: Photonic crystals are important for photocatalytic applications, as they can enhance the photocatalytic activity by adjusting the position of the photonic stopband. Coating photocatalysts onto designed photonic crystals utilizing the slow photon effect can improve the degradation efficiency of organic dyes. Additionally, an ultra-thin alumina coating can reduce the degradation of photocatalysts.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jonas Englhard, Julien Bachmann
Summary: The reduction of CO2 in water can generate volatile products and inert gas dinitrogen. Mass spectrometry is typically used for quantitative analysis, but chromatographic separation is usually required for simultaneous detection. We demonstrate that ionizing the reaction products mixture at 16 eV selectively detects CO at m/z=28, excluding CO2 and N-2. This method is applicable for headspace analysis after bulk electrolysis and enables real-time monitoring of reaction products during cyclic voltammetry.
Article
Chemistry, Multidisciplinary
Irene Papiano, Simona De Zio, Andre Hofer, Marco Malferrari, Ignacio Minguez Bacho, Julien Bachmann, Stefania Rapino, Nicolas Vogel, Giulia Magnabosco
Summary: Nanostructuration is a promising tool for enhancing the performance of sensors. In this work, a combination of colloidal assembly, atomic layer deposition, and selective surface functionalization is used to design conductive inverse opals as electrode materials for glucose sensing platforms. The final device can detect glucose at nanomolar concentrations and is not affected by common interferents. This method could be applied to other conductive materials and enzymes to develop highly efficient biosensors.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Ken J. Jenewein, Julius Knoppel, Andre Hofer, Attila Kormanyos, Britta Mayerhoefer, Florian D. Speck, Markus Bierling, Simon Thiele, Julien Bachmann, Serhiy Cherevko
Summary: In this study, a photoelectrochemical scanning flow cell coupled to an inductively coupled plasma mass spectrometer is used to investigate the influence of cocatalyst overlayers on the stability of WO3 photoanodes. It is found that thick cocatalyst layers decrease the photoactivity, while even the thinnest investigated cocatalyst overlayer significantly improves the stability of WO3. Based on these findings, strategies are proposed to synthesize nanocomposite photoelectrodes with high photoelectrochemical activity and photostability.
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)