Article
Chemistry, Multidisciplinary
Ziying Tang, Huying Zheng, Yaqi Wang, Runchen Wang, Zhiren Qiu, Yan Shen, Jie Zhou, Shichen Su, Lin Li, Hai Zhu
Summary: This study demonstrates the realization of ultralow-threshold six-photon-excited upconversion lasing through cavity quantum electrodynamics effects in a plasmonic microcavity. The Purcell factor in hybrid whisper-gallery mode is significantly enhanced, leading to enhanced nonlinear light-matter interactions. In addition, the temperature and polarization characteristics of upconversion lasing via a plasmonic-WGM approach show distinct evolution compared to a bare microwire.
Article
Chemistry, Multidisciplinary
Liqing Zhu, Yichun Pan, Linqi Chen, Zheng Wang, Fangxin Zhang, Guangran Yang, Changchang Huang, Wenping Hu, Long Zhang, Yingjun Zhang, Hongxing Dong, Weihang Zhou
Summary: We demonstrate the realization of tunable single-mode polariton lasing from highly excited Rydberg states by engineering the symmetry of the polaritonic wave function. By controlling the potential wells and the spatial overlap between the gain region and the eigen mode, we achieve single-mode lasing from quantized polariton states. The asymmetry of the potential well enables single-mode lasing even for the highly excited Rydberg state. The excellent reservoir-eigenmode overlap and efficient spatial confinement significantly reduce the lasing threshold compared to conventional pumping schemes.
Article
Chemistry, Multidisciplinary
Yiqun Ni, Zhixia Han, Junkai Ren, Zhen Wang, Wenfei Zhang, Zheng Xie, Yonghong Shao, Shuyun Zhou
Summary: By incorporating carbon dots (CDs) into ormosil gel hybrids as a solid matrix, a stable rigid structure with high PLQY and peak optical gain can be achieved, demonstrating the advantage of high transmittance in the visible/near infrared region.
Article
Chemistry, Multidisciplinary
Rui Duan, Zitong Zhang, Lian Xiao, Xiaoxu Zhao, Yi Tian Thung, Lu Ding, Zheng Liu, Jun Yang, Van Duong Ta, Handong Sun
Summary: This article presents an effective method for fabricating nanostructured whispering-gallery-mode (WGM) lasers by drop-casting CdSe/CdS@Cd1-xZnxS core/buffer-shell@graded-shell nanoplatelets (NPLs) dispersion onto silica microspheres. The room-temperature NPLs-WGM microlasers exhibit a record-low lasing threshold and stable single-mode laser output. Additionally, the Vernier effect through evanescent field coupling further optimizes the laser output performance.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mei-Yan Gao, Zirui Wang, Qiao-Hong Li, Dejing Li, Yayong Sun, Yassin H. Andaloussi, Chao Ma, Chenghua Deng, Jian Zhang, Lei Zhang
Summary: A series of catecholate-functionalized titanium-oxo clusters with atomically precise structures were synthesized and characterized. These clusters have ultralow optical band gaps and exhibit third-order nonlinear optical performance, making them promising for solid-state optical limiting applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Ying-Zhong Ma, Benjamin Doughty
Summary: Nonlinear optical (NLO) microscopy relies on multiple light-matter interactions to provide unique contrast mechanisms and imaging capabilities. However, strong excitation fields often cause photobleaching and interruption in systems of interest. This perspective focuses on the limitations of two NLO imaging modalities and highlights the unique potential of quantum-light-enabled techniques.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Physical
Xuefu Hu, Zhiye Wang, Yuming Su, Peican Chen, Yibin Jiang, Cankun Zhang, Cheng Wang
Summary: This study demonstrates that incorporating chromophores into metal-organic layers can enhance two-photon absorption effects and reduce light scattering, leading to improved nonlinear optical performance.
CHEMISTRY OF MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Qianju Cheng, Zean Lv, Zhi Liu, Qingmeng Wang
Summary: This paper presents a novel piezoelectric energy harvester (PEH) based on the traditional impact frequency up-converted PEH to achieve lower and broader operating frequency. The introduced nonlinear magnetic force offers a lower initial frequency and broader operating bandwidth, as shown by theoretical results and experimental study.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Wilhelm Becker, Dejan B. Milosevic
Summary: This study discusses the symmetries of the ionization rate and the elliptic-dichroism parameter in strong-field ionization, with a focus on high-order above-threshold ionization. By analyzing the symmetry properties of the measured momentum distribution, the ionization mechanism can be identified and information about atomic and molecular structure dynamics can be obtained.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Multidisciplinary Sciences
Chi -Ching Liu, Hui-Hsin Hsiao, Yun-Chorng Chang
Summary: The experimental observation of nonlinear two-photon pumped vortex lasing from perovskite metasurfaces is demonstrated. The vortex lasing beam is based on symmetry-protected quasi-bound states in the continuum (QBICs). The topological charge is estimated to be +1 according to the simulation result. The quality factor and lasing threshold are around 1100 and 4.28 mJ/cm(2), respectively. Theoretical analysis reveals that the QBIC mode originates from the magnetic dipole mode. The lasing wavelength can be experimentally designed within a broad spectral range by changing the diameter and periodicity of the metasurface. The finite array size effect of QBIC can affect the quality factor of the lasing and be used to modulate the lasing. Results shown in this study can lead to more complex vortex beam lasing from a single chip and previously unidentified ways to obtain ultrafast modulation of the QBIC lasing via the finite array size effect.
Article
Materials Science, Multidisciplinary
Runchen Wang, Yaqi Wang, Huying Zheng, Junxing Dong, Lisheng Wang, Huanjun Chen, Yan Shen, Hai Zhu
Summary: Researchers demonstrated the achievement of ultra-low threshold single-mode four-photon absorption upconversion lasing at room temperature through the construction of a strong-coupling microcavity and comprehensively discussed its temporal dynamic mechanism and polarization characteristics.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wei Gao, Qi Wei, Ting Wang, Jiangtao Xu, Lyuchao Zhuang, Mingjie Li, Kai Yao, Siu Fung Yu
Summary: Researchers have achieved low-threshold upconversion lasing from two-dimensional Ruddlesden-Popper perovskite microflakes at low temperatures. These flakes have a giant two-photon absorption coefficient and self-formation of Fabry-Perot microcavities, enabling effective upconversion transition and lasing emission.
Article
Chemistry, Physical
Aristeidis Stathis, Michalis Stavrou, Ioannis Papadakis, Josef Mock, Marc J. Kloberg, Markus Becherer, Alina Lyuleeva-Husemann, Stelios Couris
Summary: The study on hydride-terminated silicon nanosheets (SiNS-H) and 1-dodecene-functionalized silicon nanosheets (SiNS-C12H25 or SiNS-dodecene) demonstrates that chemical modification can enhance the nonlinear optical response of silicon nanosheets. The comparison of the NLO response of these SiNSs with single-layered and few-layered graphene nanosheets highlights the great potential of silicon-based 2D materials for various photonic and optoelectronic applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Jayakrishnan M. P. Nair, Debsuvra Mukhopadhyay, Girish S. Agarwal
Summary: The study demonstrates the remote transfer of bistability in a two-mode system with lower pumping threshold for dissipatively coupled systems. A long-lived mode emerges due to dissipative coupling and nonlinearity, responsible for heightened transmission levels and pronounced sensitivity in signal propagation.
Article
Materials Science, Multidisciplinary
Zihao Guan, Lulu Fu, Zhiyuan Wei, Naying Shan, Hui Li, Yan Fang, Yang Zhao, Zhipeng Huang, Mark G. Humphrey, Chi Zhang
Summary: Defects within perovskite layers can inhibit nonlinear optical performance, but a novel defect modulation strategy using porphyrins as functional additives can mitigate these defects and enhance the optical absorption nonlinearities of perovskite films. The results suggest that porphyrin-treated perovskite films show significantly improved NLO performance under ultrafast femtosecond laser excitation.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Hoang Long Nguyen, Thanh Nhut Do, Emek G. Durmusoglu, Merve Izmir, Ritabrata Sarkar, Sougata Pal, Oleg V. Prezhdo, Hilmi Volkan Demir, Howe-Siang Tan
Summary: In this study, the ultrafast spectral diffusion, vibronic dynamics, and energy relaxation of CdSe colloidal quantum wells (CQWs) at room temperature were measured using two-dimensional electronic spectroscopy (2DES). The energy relaxation from light-hole (LH) excitons to heavy-hole (HH) excitons was observed to occur within a time scale of approximately 210 fs. Equilibration dynamics between the spectroscopically accessible HH excitonic state and a dark state were found to take place within a time scale of approximately 160 fs. The spectral diffusion dynamics in HH excitons were analyzed using center line slope analysis, revealing a sub-200 fs decay and oscillatory features resolved at 4 and 25 meV. Quantum calculations were performed to replicate and explain the observed dynamics. The 4 meV mode was found to be in the near-critically damped regime and may mediate the transition between the bright and dark HH excitons. These findings demonstrate the capability of 2DES to comprehensively and detailedly characterize the ultrafast spectral properties in CQWs and similar nanomaterials.
Article
Biochemical Research Methods
Natalie Bruce, Francesca Farrell, Enyuan Xie, Mark G. Scullion, Anne-Marie Haughey, Erdan Gu, Martin D. Dawson, Nicolas Laurand
Summary: A fluorescence sensor capable of spatially multiplexed measurements using smartphone detection is introduced. Bioconjugated quantum dots are employed as the fluorescent label and excited by a blue-emitting microLED. The one-dimensional GaN microLED array is butt-coupled to one edge of a glass slide to utilize total internal reflection fluorescence (TIRF) principles. Bioassays on the glass waveguide's top surface are excited, and the resulting fluorescence is detected using a smartphone. The red, green, and blue channels of the digital image are used to spectrally separate the excitation light from the fluorescence for analysis. Proof-of-principle experiments using a biotin-functionalized glass slide demonstrate the detection of streptavidin conjugated quantum dots down to a concentration of 8 nM.
BIOMEDICAL OPTICS EXPRESS
(2023)
Article
Optics
Graeme E. Johnstone, Johannes Herrnsdorf, Martin D. Dawson, Michael J. Strain
Summary: Challenging imaging applications that require ultra-short exposure times or imaging in photon-starved environments often have extremely low numbers of photons per pixel (<1 photon per pixel). To improve the image quality in such photon-sparse images, post-processing techniques, such as Bayesian retrodiction and bilateral filtering, can be used to estimate the number of photons detected and improve the spatial distributions in single-photon imaging applications. In this study, we demonstrate that at high frame rates (>1 MHz) and low incident photon flux (<1 photon per pixel), image post-processing techniques can provide better grayscale information and spatial fidelity of reconstructed images compared to simple frame averaging, with up to a 3-fold improvement in SSIM.
Article
Chemistry, Multidisciplinary
M. A. Masharin, A. K. Samusev, A. A. Bogdanov, I. V. Iorsh, H. V. Demir, S. V. Makarov
Summary: Excitons in lead bromide perovskites have a high binding energy and high oscillator strength, which enables strong light-matter coupling in perovskite-based cavities at the nanoscale. In this study, a perovskite metasurface fabricated with nanoimprint lithography is used to demonstrate room-temperature polariton lasing. The observed lasing emission has a high directivity and compatibility with various planar photonic platforms.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Joseph Cameron, Alexander L. Kanibolotsky, Peter J. Skabara
Summary: The concept of heteroatom interactions in synthetic metals has been applied in recent organic semiconductor materials, leading to significant advancements.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Farzan Shabani, Muhammad Ahmad, Satish Kumar, Savas Delikanli, Furkan Isik, Arinjoy Bhattacharya, Athos Petrou, Hilmi Volkan Demir
Summary: Two-dimensional (2D) core/shell nanoplatelets (NPLs) synthesized via the hot-injection method provide excellent thermal and chemical stability for high-temperature doping. A thermodynamic approach toward silver doping of these NPLs is proposed and demonstrated. The distribution of silver ions in the lattice of the NPLs directly affects the recombination dynamics and enables fine-tuning of the near-infrared emission.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Merve Izmir, Emek G. Durmusoglu, Manoj Sharma, Farzan Shabani, Furkan Isik, Savas Delikanli, Vijay Kumar Sharma, Hilmi Volkan Demir
Summary: In this study, ytterbium (Yb) was successfully doped into cadmium selenide (CdSe) nanoplatelets (NPLs) using a modified seeded-growth method. The Yb-doped NPLs exhibited additional near-infrared (NIR) emission apart from their excitonic emission. By optimizing the dopant concentration, an impressive photoluminescence quantum yield (PL QY) of approximately 55% was achieved. Detailed elemental and optical characterizations were performed to understand the emerging photophysical properties of these Yb-doped NPLs. These lanthanide-doped CdSe NPLs emitting in the NIR range could find applications in next-generation bioimaging, night vision, and photodetection.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Yi Tian Thung, Rui Duan, Emek G. Durmusoglu, Yichen He, Lian Xiao, Calvin Xiu Xian Lee, Wen Siang Lew, Lin Zhang, Hilmi Volkan Demir, Handong Sun
Summary: Colloidal quantum wells (CQWs) are a promising gain material for optical feedback due to their unique excitonic features from 1D confinement, but current integration methods result in low laser quality. To address this, a liquid-interface kinetically driven self-assembly method is proposed to coat ultrathin CQWs onto silica microsphere cavities, achieving high-quality microlasers with a Q-factor of 13,000 at room temperature. Stable single-mode lasing output is demonstrated through evanescent field coupling in a 2D-3D microcavity configuration, highlighting the potential for future miniaturized colloidal optoelectronic and photonic applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Ahmet Tarik Isik, Farzan Shabani, Furkan Isik, Satish Kumar, Savas Delikanli, Hilmi Volkan Demir
Summary: Micro/nanoscale semiconductor multicolor lasers have great potential for improved photonic circuits. This work proposes and demonstrates multicolor optical gain and lasing from colloidal quantum wells (CQWs) in an all-solution processed optical cavity. A layered architecture with a transparent low refractive index colloidal spacing layer is designed to suppress nonradiative energy transfer and enable simultaneous amplified spontaneous emission in two colors. This architecture is adapted to a whispering-gallery-mode cavity, resulting in dual-color multimode lasing at 569 and 648 nm.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Hamed Dehghanpour Baruj, Iklim Bozkaya, Betul Canimkurbey, Ahmet Tarik Isik, Farzan Shabani, Savas Delikanli, Sushant Shendre, Onur Erdem, Furkan Isik, Hilmi Volkan Demir
Summary: Solution-processed colloidal quantum well light-emitting diodes (CQW-LEDs) with a single all-face-down oriented self-assembled monolayer (SAM) film of CQWs exhibit improved external quantum efficiency and outcoupling efficiency. The record-high external quantum efficiency of 18.1% and other favorable performance metrics indicate the effectiveness of oriented self-assembly of CQWs in CQW-LEDs.
Article
Nanoscience & Nanotechnology
Junhong Yu, Emek Goksu Durmusoglu, Yimeng Wang, Manoj Sharma, Hilmi Volkan Demir, Cuong Dang
Summary: Manipulating optical transition in semiconductors at ultrashort timescales is crucial for photonic applications. The traditional methods include electrostatic gating via Stark effects or band-gap renormalizations. This study introduces an all-optical approach to engineer an indirect transition in CdSe/CdTe core-crown colloidal quantum wells, with tunable energy shift and dynamics. The findings suggest promising applications in optical switching networks.
Review
Chemistry, Physical
Joanna Dehnel, Adi Harchol, Yahel Barak, Itay Meir, Faris Horani, Arthur Shapiro, Rotem Strassberg, Celso de Mello Donega, Hilmi Volkan Demir, Daniel R. Gamelin, Kusha Sharma, Efrat Lifshitz
Summary: Incorporating magnetic ions into semiconductor nanocrystals is a promising research field for manipulating spin-related properties. Various host materials and magnetic ions have been studied, and the impact of nanostructure engineering and ion selection in carrier-magnetic ion interactions is emphasized. The use of optically detected magnetic resonance spectroscopy provides valuable insights into the spin dynamics and physical parameters of the carrier-magnetic ion interactions.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Manpreet Kaur, Ashma Sharma, Onur Erdem, Akshay Kumar, Hilmi Volkan Demir, Manoj Sharma
Summary: Doping of alloyed colloidal quantum dots (QDs) has gained attention for their tunable and Stokes-shifted emission. High-quality Cu and Mn-doped ZnxCd1-xS alloyed QDs were synthesized, and the addition of a ZnS shell significantly improved their quantum yield (QY).
Article
Materials Science, Multidisciplinary
Eleni Margariti, Gemma Quinn, Dimitars Jevtics, Benoit Guilhabert, Martin D. Dawson, Michael J. Strain
Summary: A continuous, single shot roller transfer printing process is introduced for large-scale hybrid integration of semiconductor devices. It demonstrates transfer of a 320 x 240 pixel micro-LED array, with sub-micron relative position accuracy, representing over 75,000 individual devices in one shot. The transfer printing process maintains array geometry, with pixel spatial location error less than 1 & mu;m deviation from the as-designed layout. An automated sub-micron precision metrology system using simple optical microscopy is developed to assess device populations and yield.
OPTICAL MATERIALS EXPRESS
(2023)
Proceedings Paper
Nanoscience & Nanotechnology
Jack A. Smith, Zhibo Li, Saprtarsi Ghosh, Henry Francis, Gabriele Navickaite, Loyd J. McKnight, Rachel A. Oliver, Martin D. Dawson, Michael J. Strain
Summary: Silicon nitride (Si3N4) is a high-performance material platform for visible wavelength photonic integrated circuits, especially for heterogeneous/hybrid integration of complementary materials. This work characterizes the performance of Si3N4 from LIGENTEC as a base for hybrid integration.
2023 IEEE PHOTONICS SOCIETY SUMMER TOPICALS MEETING SERIES, SUM
(2023)
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)
