Review
Chemistry, Multidisciplinary
Xiangdong Guo, Wei Lyu, Tinghan Chen, Yang Luo, Chenchen Wu, Bei Yang, Zhipei Sun, F. Javier Garcia de Abajo, Xiaoxia Yang, Qing Dai
Summary: 2D monolayers can be vertically stacked in van der Waals heterostructures to support a wide range of confined polaritons. This offers advantages in terms of controlling the constituent layers, stacking sequence, and twist angles. These heterostructures have extended the performance and functions of polaritons, and potential applications include nanophotonic integrated circuits.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Nikhilesh Maity, Pooja Srivastava, Himani Mishra, Ravindra Shinde, Abhishek Kumar Singh
Summary: This study demonstrates the generation of linearly polarized, anisotropic intra- and interlayer excitonic bound states in the transition metal monochalcogenide (TMC) GeSe/SnS van der Waals heterostructure, showing dramatic variation in excitonic energies and optical absorption spectrum under compressive/tensile biaxial strain. The changes in excitonic energies and optical band gap are attributed to the shift in effective dielectric constant and band dispersion upon the application of biaxial strain, showing potential applications in optoelectronics and optical quantum computers.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Wenxiang Wang, Jiyou Jin, Yanrong Wang, Zheng Wei, Yushi Xu, Zhisheng Peng, Hui Liu, Yu Wang, Jiawang You, Julienne Impundu, Qiang Zheng, Yong Jun Li, Lianfeng Sun
Summary: A floating-gate memory based on van der Waals heterostructure is utilized, demonstrating a large storage window ratio (>75.5%), an extremely high on/off ratio (10^7), and an ultrafast electrical writing/erasing speed (40 ns). These enhanced performance characteristics enable excellent multilevel data storage, robust retention, and endurance performance. Stable optical erasing operations can also be achieved by illuminating the device with a laser pulse, showcasing outstanding optoelectronic storage performance (optical erasing speed >2.3 ms). The nonvolatile and high-speed characteristics of these devices hold significant potential for the integration of high-performance nonvolatile memory.
Review
Chemistry, Multidisciplinary
Hui-Lei Hou, Cosimo Anichini, Paolo Samori, Alejandro Criado, Maurizio Prato
Summary: In the past 15 years, 2D materials have revolutionized materials science and become powerful components for high-performance chemical sensors. By forming van der Waals heterostructures (VDWHs), the individual drawbacks of 2D materials can be overcome, leading to superior sensitivities, selectivity, and stability. This review discusses the latest developments in chemical sensors based on VDWHs of 2D materials, including sensing mechanisms and future directions with potential impact in environmental sciences and biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Lixin Liu, Tianyou Zhai
Summary: The article reviews the latest research activities on wafer-scale vdWHs and their applications, outlining preparation strategies and applications to showcase their potential in electronic, optoelectronic, and flexible devices fields.
Article
Chemistry, Multidisciplinary
Muhammad A. K. Purbayanto, Madhurya Chandel, Magdalena Birowska, Andreas Rosenkranz, Agnieszka M. Jastrzebska
Summary: This article discusses the fundamental basis and recent findings in vertical vdW heterostructures composed of MXenes as a primary component and other 2D materials as secondary components. MXenes, with their rich surface chemistry and intriguing optical properties, offer a unique platform for optoelectronics applications. Coupling MXenes with other 2D materials in vdW heterostructures can provide new opportunities for exploring novel physical phenomena in quantum-confined nanostructures and devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Andrey Yu Klokov, Nikolay Yu Frolov, Andrey Sharkov, Sergey N. Nikolaev, Maxim A. Chernopitssky, Semen Chentsov, Mikhail Pugachev, Aliaksandr Duleba, Alexey Shupletsov, Vladimir S. Krivobok, Aleksandr Yu Kuntsevich
Summary: This study explores the mechanical properties of layered crystals in the few layer limit using picosecond ultrasonic technique. By measuring the temporal variation of the reflection coefficient of an Al film covering heterostructures, the mechanical parameters and rigidity of the interfaces can be evaluated. The results demonstrate the potential of van der Waals heterostructures for nanoacoustical applications.
Article
Chemistry, Multidisciplinary
Huanhuan Shi, Mengmeng Li, Shuai Fu, Christof Neumann, Xiaodong Li, Wenhui Niu, Yunji Lee, Mischa Bonn, Hai I. I. Wang, Andrey Turchanin, Ali Shaygan Nia, Sheng Yang, Xinliang Feng
Summary: Two-dimensional van der Waals heterostructures (2D vdWHs) have attracted widespread attention for their abundant and exotic properties, offering new possibilities for next-generation nanoelectronics. However, the lack of high-throughput fabrication techniques poses challenges for practical applications. In this study, a general electrochemical strategy is demonstrated to prepare high-quality vdWHs with electrostatic forces driving the stacking of individual assemblies, resulting in strong interlayer interactions. Thin-film photodetectors based on graphene/In2Se3 vdWHs show great promise for near-infrared photodetection, with high responsivity, fast rise and decay times. This approach enables the exploration of emerging electronic, photonic, and quantum phenomena.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Maria G. Burdanova, Ming Liu, Michael Staniforth, Yongjia Zheng, Rong Xiang, Shohei Chiashi, Anton Anisimov, Esko Kauppinen, Shigeo Maruyama, James Lloyd-Hughes
Summary: Strong intertube excitonic coupling is demonstrated in 1D van der Waals heterostructures through the interaction of dipole-dipole Coulomb interactions and light-matter interactions. This leads to the creation of intertube biexcitons on short timescales and intertube excitons on longer timescales, which opens up new possibilities for multi-functional applications of these new nanoscale coaxial cables.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Baishan Liu, Xiankun Zhang, Junli Du, Jiankun Xiao, Huihui Yu, Mengyu Hong, Li Gao, Yang Ou, Zhuo Kang, Qingliang Liao, Zheng Zhang, Yue Zhang
Summary: This study proposes a synergistic strategy of contact-configuration design and thickness-modulation to construct high-performance van der Waals (vdW) photodiodes based on a typical type II heterostructure. By optimizing the contact architecture and thickness, efficient photocarrier collection and gate modulation are achieved, resulting in high external quantum efficiency (EQE) and ultrafast photoresponse.
Article
Chemistry, Multidisciplinary
Sultan Albarakati, Wen-Qiang Xie, Cheng Tan, Guolin Zheng, Meri Algarni, Junbo Li, James Partridge, Michelle J. S. Spencer, Lawrence Farrar, Yimin Xiong, Mingliang Tian, Xiaolin Wang, Yu-Jun Zhao, Lan Wang
Summary: This study reports electrically controllable exchange bias (EB) effects in a vdW heterostructure, FePS3-Fe5GeTe2. By applying a solid protonic gate, the EB effects can be repetitively tuned, providing significant progress for vdW heterostructure-based magnetic logic and future low-energy electronics.
Article
Nanoscience & Nanotechnology
Amir Muhammad Afzal, Muhammad Zahir Iqbal, Ghulam Dastgeer, Ghazanfar Nazir, Jonghwa Eom
Summary: A unique two-dimensional transition-metal dichalcogenide vdWH photodetector was reported, capable of high-performance photodetection in the visible and near-infrared range with high rectification ratio and responsivity. The intralayer and interlayer transition of excitations enables broadband photoresponse with fast response times.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Yunfeng Chen, Yang Wang, Zhen Wang, Yue Gu, Yan Ye, Xuliang Chai, Jiafu Ye, Yan Chen, Runzhang Xie, Yi Zhou, Zhigao Hu, Qing Li, Lili Zhang, Fang Wang, Peng Wang, Jinshui Miao, Jianlu Wang, Xiaoshuang Chen, Wei Lu, Peng Zhou, Weida Hu
Summary: Band-engineered van der Waals heterostructures are able to construct high room-temperature detectivity detectors for visible light and blackbody infrared light by blocking dark current without suppressing photocurrent. Utilizing two-dimensional materials with self-passivated surfaces and tunable band structures, unipolar barriers can be designed to avoid lattice mismatch and interface defects, achieving low dark current and high detectivity in photodetectors.
NATURE ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Kenan Zhang, Changchun Ding, Baojun Pan, Zhen Wu, Austin Marga, Lijie Zhang, Hao Zeng, Shaoming Huang
Summary: This study investigates the growth mechanisms of 2D van der Waals heterostructures using a custom-built system and identifies a new growth mode with different rate and morphology. A model is proposed to explain the differences in morphologies and growth rates of the two modes. The findings from a range of material combinations may benefit the synthesis of other 2D heterostructures with controlled properties for future device applications.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xuan Ji, Zongqi Bai, Fang Luo, Mengjian Zhu, Chucai Guo, Zhihong Zhu, Shiqiao Qin
Summary: The research team successfully fabricated MoTe2-MoS2 van der Waals heterostructure photodetectors with great performance, operating without bias voltage, high photocurrent on/off ratio, and high photoresponsivity.
Article
Chemistry, Multidisciplinary
Ali Imran, Muhammad Sulaman, Muhammad Yousaf, Muhammad Abid Anwar, Muhammad Qasim, Ghulam Dastgeer, Kossi A. A. Min-Dianey, Baoyu Wang, Xinqiang Wang
Summary: The demand for high mobility semiconductors has increased due to the fabrication of high-speed electronic and communication devices. Indium nitride (InN) could be a potential candidate for industrial applications due to its simple and low-cost fabrication process, as well as unique electronic properties such as narrow direct bandgap and high electron mobility. The experimental results demonstrate the high quality and high mobility of the InN film, making it a potential candidate for high-speed electronic/optoelectronic devices.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Ehsan Elahi, Ghulam Dastgeer, Pradeep Raj Sharma, Vijay D. Chavan, Hwayong Noh
Summary: This paper presents the fabrication and characterization of vertical spin valve based on CoFe/TiO2/CoFe structure. The effect of TiO2 thickness on magnetoresistance (MR) is studied and TiO2 is identified as a favorable spacer material. Additionally, a negative tunneling MR is observed, possibly due to the spin filtering effect.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ghulam Dastgeer, Sobia Nisar, Zafar Muhammad Shahzad, Aamir Rasheed, Deok-Kee Kim, Syed Hassan Abbas Jaffery, Liang Wang, Muhammad Usman, Jonghwa Eom
Summary: Van der Waals heterostructures composed of atomically thin 2D materials are used to build multi-functional logic devices and atomically thin photodetectors. In this study, a vdW stacking of black arsenic and tin disulfide is introduced to create a negative differential resistance device, and its charge transport characteristics and real-time response to different molecule concentrations are investigated.
Article
Materials Science, Multidisciplinary
Muhammad Usman, M. U. U. Ishafaq, Zahir Muhammad, Wajid Ali, Ghulam Dastgeer, Xiao Zhang, Liang Wang
Summary: The controllable assembly of gold nanorods (GNRs) on hydrophobic substrates was developed in this study to improve the surface enhanced Raman spectroscopy (SERS) applications. The hydrophobic substrate was created by spin coating silicone oil on glass slides. The analyte molecule rhodamine (R6G) was used to demonstrate the effects of the synthesized arrays. This new method allows for a wide range of packing patterns and mechanisms by changing the host nanoparticles in the dispersion.
FRONTIERS IN MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ehsan Elahi, Muhammad Suleman, Sobia Nisar, Pradeep Raj Sharma, Muhammad Waqas Iqbal, Supriya A. Patil, Honggyun Kim, Sohail Abbas, Vijay D. Chavan, Ghulam Dastgeer, Jamal Aziz
Summary: For emerging wearable chip-based electronics, power loss is a critical concern due to high subthreshold swing (SS) value. This review article elaborates on various steep slope transistor (SST) architectures based on 2-dimensional (2-D) materials, transition material oxides (TMO) and organic materials to achieve ultra-low SS value and low power consumption. It also explores the prominence of neuromorphic devices based on memtransistors using 2-D materials and TMO materials. These explored ideas offer new approaches for developing improved wearable devices with effective carrier manipulation for micro and nanoelectronics applications.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Analytical
Misbah Shahzadi, Sobia Nisar, Deok-Kee Kim, Nasir Sarwar, Aamir Rasheed, Waqas Ahmad, Amir Muhammad Afzal, Muhammad Imran, Mohammed Ali Assiri, Zafar M. M. Shahzad, Ghulam Dastgeer
Summary: This work aimed to develop an efficient method for functionalizing 2D materials using a pyrene-based supporter construct to detect target proteins. Pristine graphene was grown and transferred over a substrate for functionalization using the pyrene-lysine-based supporter construct. The optimum concentration of the functionalized construct was evaluated using atomic force microscopy, Raman spectroscopy, and real-time electrical measurements. The performance of the functionalized graphene was tested by detecting the response to different concentrations of streptavidin protein.
Article
Materials Science, Ceramics
Ushnah Falak, Aamir Rasheed, Tabinda Rasheed, Ghulam Dastgeer, Seung Goo Lee, Sara Ajmal
Summary: This study proposes a new and cost-effective method for synthesizing AgNPs-decorated reduced graphene oxide (Ag@RGO) and its stable nanocomposites (NCs) with titanium carbide MXene for flexible supercapacitors (SCs). The MXene/Ag@RGO NCs show improved electrochemical performance compared to individual MXene. The electrostatic interactions between AgNPs@RGO and MXene stabilize the assembly of 2D layers and maintain an optimal distance between MXene layers for efficient charge transport. The prepared NCs demonstrate significant potential for high-performance SC electrodes.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Muhammad Usman, Sobia Nisar, Deok-kee Kim, Sergii Golovynskyi, Muhammad Imran, Ghulam Dastgeer, Liang Wang
Summary: A lateral phototransistor structure based on mechanically exfoliated multilayer black arsenic (b-As) is studied for its in-plane anisotropic photoelectrical properties. The morphology and structure of the b-As flake are characterized with respect to light polarization and crystal structure orientation. The lateral photodetector structure is prepared by depositing polar-oriented electrodes along the b-As crystal directions. Angle-resolved electrical transport and polarization resolved photocurrent measurements reveal strong in-plane anisotropic photoelectrical properties, with higher conductance and photocurrent across the armchair direction than the zigzag one.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Energy & Fuels
Tabinda Rasheed, Aamir Rasheed, Fatimah Mohammed A. Alzahrani, Sara Ajmal, Muhammad Farooq Warsi, M. S. Al-Buriahi, Ghulam Dastgeer, Seung Goo Lee
Summary: Electrocatalytic water splitting is a promising approach for massive hydrogen production, but the development of an active, stable, and low-cost electrocatalyst is challenging. MXene has shown potential as an electrocatalyst, but its poor stability and synthesis routes hinder its application. In this study, we synthesized MXene and its composites with CoNiFe2O4 using an acid-free wet chemical approach for efficient water splitting. We used a layer-by-layer assembly approach to prevent restacking of MXene flakes and achieved high electrocatalytic performance. The catalyst showed good overpotentials and high electrochemical stability, surpassing many reported catalysts. This study provides insights into the design of low-dimensional electrocatalysts for water splitting.
Article
Biochemistry & Molecular Biology
Usama Bin Humayoun, Fazal Mehmood, Yasir Hassan, Aamir Rasheed, Ghulam Dastgeer, Asad Anwar, Nasir Sarwar, Daeho Yoon
Summary: This study successfully immobilized zinc oxide and carbon nanotubes onto a textile substrate, creating an efficient immobilized photocatalyst for degrading commercial textile colorants. The integration of zinc oxide, carbon nanotubes, and chitosan in the fabric significantly improved the photocatalytic performance.
Article
Chemistry, Multidisciplinary
Sobia Nisar, Beriham Basha, Ghulam Dastgeer, Zafar M. Shahzad, Honggyun Kim, Iqra Rabani, Aamir Rasheed, M. S. Al-Buriahi, Ahmad Irfan, Jonghwa Eom, Deok-kee Kim
Summary: In this study, a two-dimensional semiconductor biosensor based on tin disulfide/hexagonal boron nitride (SnS2/h-BN) was developed for the detection of streptavidin protein. A self-designed receptor was utilized to maintain the sensitivity of the biosensor, and the detection capabilities were investigated using Raman spectroscopy and electrical characterizations. The results showed that the SnS2/h-BN biosensor had high sensitivity and rapid response to low concentrations of target analytes, making it valuable for applications in point-of-care diagnostics, drug discovery, and environmental monitoring.
Article
Engineering, Electrical & Electronic
Sobia Nisar, Misbah Shahzadi, Zafar Shahzad, Deok-kee Kim, Ghulam Dastgeer, Ahmad Irfan
Summary: Effective biosensors based on 2D field-effect transistors (FETs) composed of atomically thin semiconducting materials have been developed for prompt and label-free sensing applications. This study presents a biosensing system utilizing a MoTe2-based FET for the detection of streptavidin protein. The biosensor's dynamic behavior in detecting different concentrations of streptavidin was investigated. These 2D-FET biosensors have the potential to detect target DNA and various proteins, including the spike protein associated with Covid-19.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Syed Hassan Abbas Jaffery, Muhammad Riaz, Zeesham Abbas, Ghulam Dastgeer, Sikandar Aftab, Sajjad Hussain, Muhammad Ali, Jongwan Jung
Summary: This study demonstrates the strong interlayer transition and excellent broadband photodetection of the GeSe/MoTe2 van der Waals (vdW) heterojunction. The spatial segregation of photogenerated electron-hole pairs is enabled by the formation of staggered band alignment. The heterojunction exhibits outstanding optoelectronic characteristics and can be used as a logic inverter. The findings of this study will be crucial for the development of multifunctional vdW heterostructure devices.
Article
Chemistry, Physical
Ghulam Dastgeer, Sobia Nisar, Aamir Rasheed, Kamran Akbar, Vijay D. Chavan, Deok-kee Kim, Saikh Mohammad Wabaidur, Muhammad Wajid Zulfiqar, Jonghwa Eom
Summary: In this study, a non-volatile floating-gate memory device based on van der Waals heterostructures is presented, which exhibits ultrahigh-speed memory operations and excellent endurance performance, offering promising potential for ultrahigh-density information storage.
Article
Nanoscience & Nanotechnology
Sobia Nisar, Ghulam Dastgeer, Misbah Shahzadi, Zafar Muhammad Shahzad, Ehsan Elahi, Ahmad Irfan, Jonghwa Eom, Honggyun Kim, Deok-kee Kim
Summary: Atomically thin two-dimensional transition metal dichalcogenide (TMDC) semiconductor materials have exceptional properties for fabricating electronic devices and biosensors. In this study, a transistor composed of n-type molybdenum diselenide (n-MoSe2) was successfully fabricated and utilized as a biosensor for protein detection.
MATERIALS TODAY NANO
(2023)
