Article
Chemistry, Multidisciplinary
Alam Saj, Shaikha Alketbi, Sumayya M. Ansari, Dalaver H. Anjum, Baker Mohammad, Haila M. Aldosari
Summary: This study demonstrates the deposition of size-controlled gold nanoclusters using direct-current magnetron sputtering and inert gas condensation techniques. The impact of different source parameters on the size and yield of the nanoclusters is investigated. The results provide insights into the formation mechanism of gold nanoclusters.
Article
Chemistry, Physical
Sergey Mutilin, Lyubov Yakovkina, Vladimir A. Seleznev, Victor Ya Prinz
Summary: This article analyzed the position-controlled and catalytic-free synthesis of vanadium dioxide (VO2) nanowires grown on nanoimprinted silicon substrates, showing that the height of the nanowires decreases with an increase in their cross-sectional area. The study on the growth behavior of VO2 nanowires revealed a linear dependence of the height on time for vertical nanowires along the [100] direction, while horizontal nanowires showed little variation with growth time and precursor concentration. The results provide insights into the growth of high-aspect ratio VO2 nanowires and the formation of large VO2 nanowire arrays with controlled composition and properties.
Article
Chemistry, Multidisciplinary
Vladimir V. Fedorov, Yury Berdnikov, Nickolay V. Sibirev, Alexey D. Bolshakov, Sergey V. Fedina, Georgiy A. Sapunov, Liliia N. Dvoretckaia, George Cirlin, Demid A. Kirilenko, Maria Tchernycheva, Ivan S. Mukhin
Summary: The study demonstrates highly controllable self-catalyzed growth of gallium phosphide (GaP) nanowires on template-free silicon substrates, achieving a high yield of vertical GaP nanowires with control over surface density. The approach also allows for independent control of GaP nanowire length and diameter, providing a new method for designing photonic and electronic devices at the nanoscale.
Article
Chemistry, Physical
Xibao Yang, Hang Lv, Shuanglong Chen, Qiushi Wang, Linhai Jiang
Summary: Ultrafine Si embedded SiO2 nanowires were prepared by thermal evaporation with Pt catalyst, and grown in-situ on Si substrate, exhibiting a vapor-liquid-solid growth mechanism. The ultrafine Si embedded SiO2 nanowires show a slightly larger absorption edge due to the quantum confinement effect. The photoluminescence results indicate a blue shift in the ultrafine nanowires, which can be attributed to the quantum confinement effect caused by their small size. The Pt-related light emission characteristics will drive the development of nanowires in optoelectronics.
Article
Materials Science, Ceramics
Thi Ha Tran, Thi Mai Anh Nguyen, Vu Phuong Thao Dao, Cong Doanh Sai, Thanh Cong Bach, Nguyen Hai Pham, An Bang Ngac, Van Thanh Pham, Thi Kim Chi Tran, Hyeonsik Cheong, Viet Tuyen Nguyen
Summary: This study reports a facile process to fabricate CuO/Au core/shell nanowires, which show high sensitivity as SERS substrates capable of detecting methylene blue at concentrations as low as 10(-13) M. The major advantages of these SERS substrates are their sensitivity, uniformity, and purity without the presence of organic surfactants in the synthesis process.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
E. Zielony, R. Szymon, A. Wierzbicka, A. Reszka, M. Sobanska, W. Pervez, Z. R. Zytkiewicz
Summary: In this study, Raman scattering and X-ray diffraction techniques were used to investigate strain and lattice vibration mechanisms in self-assembled GaN-AlxGa1-xN nanowire structures. The analysis of Raman spectra and XRD data provided insights into the chemical composition, strain, and lattice vibration mechanisms in these nanowires.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Haining Li, Bing Yang, Biao Yu, Nan Huang, Lusheng Liu, Jiaqi Lu, Xin Jiang
Summary: Treatment of hydrogen plasma on silicon nanowires, followed by coatings of nanocrystalline diamond and multilayer graphene, enables enhanced Raman signals with reduced fluorescent background. The graphene-coated nanowires show lower fluorescent background than diamond-coated ones, with a minimum detection limit of 10(7) mol/L and an enhancement factor exceeding 10(4). The stable Raman enhancement is attributed to hydrogen-terminated graphene and the nanowire structure, independent of graphene layers and maintaining stability after exposure to the atmosphere for a month.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Beibei Dai, Chao Fan, Xing Xu, Zhuodong Qi, Qin Xiao, Jinhui Wei, Sha Jiang, Qinglin Zhang
Summary: Flag-like CdS microstructures were grown via a PVD route with the assistance of a Pb catalyst and CdS wire sidewall template. The higher defect density in the CdS flag compared to the CdS wire leads to a wider optoelectronic response range for the former. The growth mechanism was well understood through investigating the morphology evolution of the sample at different growth stages.
Article
Chemistry, Physical
Giorgos Boras, Xuezhe Yu, H. Aruni Fonseka, George Davis, Anton V. Velichko, James A. Gott, Haotian Zeng, Shiyao Wu, Patrick Parkinson, Xiulai Xu, David Mowbray, Ana M. Sanchez, Huiyun Liu
Summary: Self-catalyzed AlGaAs nanowires and AlGaAs/GaAs nanowires with quantum dots were successfully grown on Si substrates, showing strong room temperature photoluminescence and potential for applications in nanolasers and single-photon sources. The structural studies revealed the self-formation of an Al-rich AlGaAs shell with wide alloy fluctuations, while individual nanowires exhibited clear quantum dot behavior with spatially localized emission and narrow exciton line width.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Wipakorn Jevasuwan, Mostafa Abdelbar, Bernice Mae Yu Jeco-Espaldon, Mohammed Abdelhameed, Hassanet Sodabanlu, Qinqiang Zhang, Yoshitaka Okada, Naoki Fukata
Summary: In order to achieve low-cost and flexible solar cells, researchers have successfully grown aluminum-catalyzed silicon nanowires on thin silicon wafers, minimizing interfacial defects and light absorption loss. They have also fabricated thin silicon nanowire solar cells using manganese-doped cesium lead chloride perovskite nanocrystals, achieving an enhanced power conversion efficiency of up to 9%.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ashwani Kumar, Shekhar Tyagi, Rinku Kumar, Siddharth Sharma, Meenakshi Sharma, Ravikant Adalati, Yogesh Kumar, Ramesh Chandra
Summary: 2D layered MoS2-carbon composite developed with the DC sputtering technique shows promise as an electrode material, with good phase purity and nanoworm structures suitable for charge storage. Elemental mapping and XPS confirm the appropriate compositional and valence states of the composite.
Article
Chemistry, Physical
Jason Potticary, Emily J. Luke, Ektor M. S. Christodoulou, Rowena Davies, Sorrel Haughton, Cheryl Feuillet-Palma, Eliana Recoba-Pawlowski, Brigitte Leridon, Sarah Griffin, Simon R. Hall
Summary: As devices continue to shrink and become more efficient, the synthesis of high-performance materials with precise control has become a major focus. This study demonstrates a template-free, flux-mediated method for producing large quantities of phase-pure, high-temperature superconductor nanowires, including the important quinternary superconductor Bi2Sr2CaCu2O8+x (B2212) for the first time. The findings of this research could potentially lead to further exploration of the physics and chemistry of highly anisotropic superconductor nanowires and their integration into nanoelectronics and energy generation systems.
Article
Chemistry, Multidisciplinary
Yu-Ping Qiu, Liang-Liang Zhou, Qing Shi, Ping Wang
Summary: Free-standing Pt-Ni nanowires were synthesized via a one-pot solvothermal method, demonstrating high activity and 100% H-2 selectivity for hydrous hydrazine decomposition at mild temperatures without the need for a basic support. This study provides a new perspective on the design of advanced catalysts for on-demand H-2 generation from hydrous hydrazine.
CHEMICAL COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Liwei D. Geng, Ranjit Pati, Yongmei M. Jin
Summary: This study investigates the atomic-level structure property relationship of the gamma-FeSi2/Si(001) interface, showing that an external electric field can stabilize a spin-active interface and control magnetism. The sixfold and sevenfold coordinated structures exhibit the highest polarizability, indicating a non-linear response to the electric field.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sergey Mutilin, Victor Ya Prinz, Lyubov Yakovkina, Anton K. Gutakovskii
Summary: This study developed a strategy for the formation of hybrid Si/VO2 nanostructures compatible with standard silicon technology, based on selective synthesis of VO2 crystals on 3D silicon structures. The method allows for precise arrays of VO2 nanorings on silicon cylinders, opening up possibilities for post-silicon optoelectronics and neuromorphic circuits.
Article
Chemistry, Multidisciplinary
Ravi K. Biroju, Bhanu Chandra Marepally, Pariksha Malik, Soumen Dhara, Saravanan Gengan, Dipak Maity, Tharangattu N. Narayanan, Pravat K. Giri
Summary: In this study, defective graphene and transition metal (TM) hybrids were investigated for their plasmonic effects in UV-vis-NIR spectrum. Extensive analysis using Raman spectroscopy, transmission electron microscopy, and absorption measurements was conducted. The findings revealed the interaction between plasmonic nanoparticles and graphene and the charge transfer process. The defective graphene and Au hybrids showed significant Raman enhancement with practical applications.
Article
Nanoscience & Nanotechnology
Tadasha Jena, Md Tarik Hossain, Upasana Nath, Manabendra Sarma, Hiroshi Sugimoto, Minoru Fujii, P. K. Giri
Summary: In this study, it is discovered that intrinsic defects in 2D palladium diselenide (PdSe2) dendrites can serve as hotspots for high surface-enhanced Raman spectroscopy (SERS) enhancement. The vacancy-rich dendritic PdSe2 demonstrates a SERS enhancement factor >10(5) and can detect RhB at a concentration down to 10(-8) M. The topological defects and edge construction in PdSe2 dendrites contribute to the high enhancement in the SERS signal. This research bridges the gap between conventional plasmonic SERS substrates and plasmon-free SERS substrates.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Review
Chemistry, Analytical
Abdul Kaium Mia, M. Meyyappan, P. K. Giri
Summary: Since the discovery of graphene in 2004, there has been a significant increase in research on two-dimensional (2D) materials. Transition metal dichalcogenides (TMDs) are a class of 2D materials with unique optical and electronic properties that make them suitable for various applications. In this review, the use of TMDs in biosensors for real-time detection of biomarkers and the potential for healthcare devices are discussed.
Review
Materials Science, Multidisciplinary
Joydip Ghosh, Sumaiya Parveen, P. J. Sellin, P. K. Giri
Summary: Layered metal halide perovskites have gained significant attention due to their unique optical and electronic properties. This article reviews the recent progress and opportunities in 2D and quasi-2D perovskites for various applications, including LEDs, lasers, memristors, neuromorphic/synaptic devices, UV-vis photodetection, X-ray detection, scintillators, and photocatalysis. The crystal structure, characteristics, and fundamental properties of 2D layered perovskites are discussed, along with their excellent luminescence properties for light-emitting applications. The exceptional properties of 2D perovskites, such as low leakage current and high stability, make them suitable for memristor devices. The article also highlights the outstanding performance of 2D perovskites in UV-vis photodetection and their potential as superior candidates for X-ray detection and scintillation.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Souradip Ganguly, Sumana Paul, Deepak Khurana, Tuhin Suvra Khan, P. K. Giri, Chanchal Loha, Sirshendu Ghosh
Summary: Electrocatalytic hydrogen (H2) generation has been a popular research topic in the past decade because H2 is a clean and non-polluting energy source. Substituting the oxygen evolution reaction (OER) with easily oxidizable substrate oxidation reaction can result in H2 production at a lower energy cost. Ni1-xCoxSe electrocatalyst has been developed for efficient conversion of alcohol molecules to value-added commodity chemicals.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ravinder Chahal, Abhilasha Bora, P. K. Giri
Summary: This study demonstrates the growth of highly crystalline and uniform Cs2AgBiBr6 thin films via chemical vapor deposition (CVD). The thin films exhibit high structural and compositional uniformity with excellent thermal stability and optoelectronic performance. The substrate-dependent growth aids in studying the induced lattice strain, while a detailed analysis of electron-phonon and phonon-phonon interactions was conducted in the Cs2AgBiBr6 double perovskite system. Additionally, the CVD-grown Cs2AgBiBr6 film on a SiO2 substrate showed fast photoresponse when used as a photodetector. The results provide insights for the development of high-performance optoelectronic devices based on lead-free inorganic double perovskites.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Md Tarik Hossain, Larionette P. L. Mawlong, Tadasha Jena, Abhilasha Bora, Upasana Nath, Manabendra Sarma, P. K. Giri
Summary: Interlayer charge transfer based on band alignment is important for various optoelectronic applications. This study investigates the interlayer coupling and charge transfer in a heterostructure composed of van der Waals and non-van der Waals materials. It is found that significant interlayer charge transfer occurs due to favorable band alignment. These findings have implications for understanding the interaction between different types of 2D heterostructures and their potential applications in optoelectronics.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ramesh Ghosh, Joydip Ghosh, P. K. Giri, Puspendu Guha, Gyu-Chul Yi
Summary: A facile growth of hybrid perovskite nanoparticles (NPs) has been demonstrated on mesoporous, high-aspect ratio, morphology-controlled Si nanorod (NR) arrays. The perovskite NPs coated on dimension- and position-controlled Si NR arrays exhibited strong photoluminescence (PL) and cathodoluminescence (CL) emission properties, with enhanced intensity compared to bulk perovskite microcrystals. The findings suggest the potential applications of perovskite nanocrystals in next-generation photonic sources. Evaluation: 8/10
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Rakesh K. Prasad, Koushik Ghosh, Pravat K. Giri, Dai-Sik Kim, Dilip K. Singh
Summary: Future generation technologies require high efficiency photodetectors for ultrafast communication and machine vision. Monolayered two-dimensional semiconductor-based photodetectors have the potential to fulfill these requirements. In this paper, a WS2-based photodetector was fabricated with high sensitivity and low incident power density, demonstrating its capability to replace Si-photodetectors with superior performance parameters.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Subhankar Debnath, Koushik Ghosh, M. Meyyappan, P. K. Giri
Summary: A high-performance Si/WS2 quantum dot-based heterostructure photodetector has been fabricated by a simple printing process, exhibiting short electrode gap, high photo-to-dark current ratio, high responsivity, and wide wavelength range. The high-performance photodetection is attributed to the defect-free interface at the heterojunction, enabling efficient charge separation and high photocurrent. Furthermore, the 2D-printed device shows good photodetection even in self-powered conditions.
Article
Chemistry, Multidisciplinary
Sumana Paul, Sanju Nandi, Mandira Das, Abhilasha Bora, Md Tarik Hossain, Subhradip Ghosh, P. K. Giri
Summary: In this study, ultrathin Bi2O2Se quantum dots with small size and strong visible fluorescence were synthesized using a top-down chemical approach. These quantum dots exhibited high optical band gap and fluorescence quantum yield in the green region, and were selective for detecting iron ions over a wide dynamic range with low detection limit. The mechanism of fluorescence and quenching induced by iron ions was investigated, and the synthesis method was proposed for potential applications in heavy metal ion sensing.
Article
Chemistry, Multidisciplinary
Md Tarik Hossain, Tadasha Jena, Upasana Nath, Manabendra Sarma, P. K. Giri
Summary: The success of non-van der Waals two-dimensional bismuth oxyselenide crystals in optoelectronics has opened up opportunities to explore their fundamental properties. However, the origin of photoluminescence and the effect of growth substrates on the structure and optical properties of these crystals remain unclear. This study reveals that the formation of multiple excitons in momentum valleys is responsible for broadband absorption and visible photoluminescence in few-layer thick bismuth oxyselenide. It also demonstrates that different growth substrates introduce strain and doping, thereby modulating the morphology, absorption, and photoluminescence properties.
Article
Materials Science, Multidisciplinary
Md Tarik Hossain, Tadasha Jena, Subhankar Debnath, P. K. Giri
Summary: In this study, ultrathin Bi2O2Se nanostructures were synthesized through a scalable chemical reaction process and their structural and optoelectronic functionalities were modulated through vacuum annealing. It was found that vacuum annealing improved the crystal quality and led to a conversion from negative persistent photoconductivity to positive photoconductivity. The defects in the nanocrystals also played a key role in modulating the wavelength-dependent photoconductivity. The research highlights the importance of vacuum annealing in improving the crystallinity and the practical applications of Bi2O2Se nanostructures in optoelectronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Sirsendu Ghosal, Abhilasha Bora, P. K. Giri
Summary: Oxygen vacancy engineering in metal oxide-based semiconductors is an important research area for sensing applications. In this study, we demonstrate that oxygen vacancy engineering in Niobium pentoxide enables ultrahigh SERS sensitivity. Through analysis of experimental data and theoretical calculations, we show that the SERS performance is directly proportional to the oxygen vacancy concentration in the Nb2O5 nanoparticles.
Article
Materials Science, Biomaterials
Abdul Kaium Mia, Abhilasha Bora, Md Tarik Hossain, Swapnil Sinha, P. K. Giri
Summary: In this study, the ultrafast and sensitive detection of Staphylococcus aureus was achieved using a tungsten disulfide quantum dot and bismuth oxyselenide nanosheet hybrid. The detection was based on the unique optical functionalities of these materials, and a specific sequencing single-standard DNA aptamer was used for selective detection. The proposed biosensor showed a linear response and fast response time, and it was successfully tested in human urine samples.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Physics, Condensed Matter
Shivani Gohri, Jaya Madan, Rahul Pandey
Summary: This study improves the efficiency of SnS-based solar cells by implementing the glancing angle deposition approach and introducing a CZTSSe layer. The findings offer valuable insights for enhancing the design of SnS-based solar cells and making them more efficient.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Mahboubeh Yeganeh, Davoud Vahedi Fakhrabad
Summary: The lattice thermal conductivity of CdO monolayer was investigated, and it was found to be lower than that of bulk CdO due to the lower phonon lifetime and phonon group velocity. As a result, the monolayer exhibits higher thermoelectric efficiency compared to the bulk counterpart.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Shivam Srivastava, Prachi Singh, Anjani K. Pandey, Chandra K. Dixit
Summary: In this research paper, a novel equation of state (EOS) based on finite strain theories is proposed for predicting the thermo elastic properties of various materials. Extensive analysis and comparison with existing models and experimental data demonstrate the validity and effectiveness of the proposed EOS in capturing the unique thermodynamic behavior of nanomaterials, bulk metallic glasses, and superconductors. This research is of great importance in the fields of materials science, nanotechnology, and condensed matter physics.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Subrata Das, Sanjoy Kr Mahatha, Konstantin Glazyrin, R. Ganesan, Suja Elizabeth, Tirthankar Chakraborty
Summary: In this study, we investigated the structural evolution of Tb2Ti2O7 under external pressure and temperature, and confirmed the occurrence of an isostructural phase transition beyond 10 GPa pressure. This transition leads to changes in lattice parameters and mechanical properties, which can be understood in terms of localized rearrangement of atoms.
SOLID STATE COMMUNICATIONS
(2024)
Article
Physics, Condensed Matter
Hamze Mousavi
Summary: It has been found that undoped graphene sheet has zero states at the Fermi energy level, making it difficult for Cooper pairing to occur in the superconductive state. However, T-graphene, with physical properties similar to graphene, exhibits metallic behavior and has available electron states near the Fermi level. The gap equation for the s-wave superconductive state is derived based on the attractive Hubbard model and the Bogoliubov de Gennes equation for this two-dimensional metallic system. It is found that a nonzero critical temperature, τ, exists for different levels of electron-electron interaction, ǫ. τ has higher values when the system has electronic half band-filling, but decreases when the system does not have half band-filling. However, τ vanishes when ǫ becomes small enough near the band edges.
SOLID STATE COMMUNICATIONS
(2024)
