Article
Chemistry, Multidisciplinary
Daniel Aguilar-Ferrer, Thomas Vasileiadis, Igor Iatsunskyi, Marcin Ziolek, Klaudia Zebrowska, Olena Ivashchenko, Paulina Blaszkiewicz, Bartosz Grzeskowiak, Raquel Pazos, Sergio Moya, Mikhael Bechelany, Emerson Coy
Summary: A hybrid nanoplatform consisting of an AuNR core surrounded by a polydopamine (PDA) shell was synthesized and its photocatalytic behavior was studied. The nanocomposites exhibited better photocatalytic performance compared to bare AuNRs and bare PDA nanoparticles. The thickness of the PDA shell affected the plasmon response of the composite. Photodegradation kinetics, time-resolved spectroscopy, and finite-element-method simulations showed that the plasmons of AuNRs, coupled with the low thermal conductivity of PDA, provided slow thermalization while enhancing charge carrier transfer.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiaodong Zhu, Juan Wang, Daixiong Yang, Jiawei Liu, Lili He, Mao Tang, Wei Feng, Xiaoqiang Wu
Summary: The study showed that Ag modification had negligible impact on the crystal structure and surface properties of ZnO, but effectively suppressed the recombination of photogenerated electrons and holes. Ag-ZnO photocatalysts exhibited significantly improved photocatalytic activity compared to commercial P25, mainly due to the generation of more O-2(-) radicals at Ag-ZnO heterojunctions.
Article
Nanoscience & Nanotechnology
Yukari Yamazaki, Tetsuya Toyonaga, Naoto Doshita, Kohsuke Mori, Yasutaka Kuwahara, Suzuko Yamazaki, Hiromi Yamashita
Summary: Hydrogen spillover induces defects in TiO2, improving conductivity and visible light absorption. Crystal facet engineering enhances activity by influencing electron and hole recombination. Pt-deposited TiO2-x nanorods synthesized through crystal facet engineering exhibit high catalytic activity under visible light.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Yukari Yamazaki, Tetsuya Toyonaga, Naoto Doshita, Kohsuke Mori, Yasutaka Kuwahara, Suzuko Yamazaki, Hiromi Yamashita
Summary: Hydrogen spillover can assist in introducing defects in a TiO2 crystal, while crystal facet engineering offers a promising approach to influencing the recombination step of photo-generated electrons and holes. In this study, rutile TiO2 nanorods were synthesized with different aspect ratios and Pt-deposited TiO2-x nanorods were obtained via reduction treatment assisted by hydrogen spillover. The Pt/TNR with a higher aspect ratio reduced at 200 degrees C exhibited the highest activity in photocatalytic H-2 production under visible light irradiation due to the synergistic effect of Ti3+ defects introduction and spatial charge carrier separation induced by crystal facet engineering.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
G. Ramalingam, C. Maria Magdalane, B. Arjun Kumar, R. Yuvakkumar, G. Ravi, A. Irudaya Jothi, Naresh Kumar Rotte, G. Murugadoss, Antony Ananth
Summary: Cadmium selenide (CdSe) semiconductor nanorods were prepared using hydrazine hydrate and ammonia as reducing agents in a hydrothermal process, resulting in reduced stacking faults and high photocatalytic efficiency. The CdSe nanorods exhibited a crystalline size of 20-30 nm and a bandgap of 2.17 eV, with the presence of oxygen vacancy defects indicated in the photoluminescence spectrum.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Physical
Hang Yin, Zhehao Sun, Kaili Liu, Ary Anggara Wibowo, Julien Langley, Chao Zhang, Sandra E. Saji, Felipe Kremer, Dmitri Golberg, Hieu T. Nguyen, Nicholas Cox, Zongyou Yin
Summary: This study reveals the synergy between defection sites on catalyst surfaces and hard metal nanoparticles, and their importance in enhancing photocatalytic activity and maintaining selectivity.
NANOSCALE HORIZONS
(2023)
Article
Engineering, Environmental
Mahboubeh Rabbani, Javad Shokrayian, Rahmatollah Rahimi, Rezvaneh Amrollahi
Summary: Zinc oxide and doped zinc oxide nanorods were successfully synthesized using a simple template-free precipitation technique, with meso-tetrakis (4-sulfonatophenyl) porphyrin immobilized on the zinc oxide nanorods. The photocatalytic activity of TPPS/ZnO was found to be higher than that of pure zinc oxide and doped zinc oxide under visible light irradiation, as revealed by various characterization techniques and degradation studies of methylene blue.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Subramanian Keerthana, Balasubramanian Jansi Rani, Rathinam Yuvakkumar, Ganesan Ravi, Balasubramaniam Saravanakumar, Mehboobali Pannipara, Abdullah G. Al-Sehemi, Dhayalan Velauthapillai
Summary: Waste water remediation is a global research hotspot for reducing water scarcity. NiMoO4 nanorods showed better efficiency in degrading methylene blue dye under visible light irradiation.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Inorganic & Nuclear
Xiang Li, Qiulin Li, Tiantian Zhang, Yongbing Lou, Jinxi Chen
Summary: The Ni2P/UiO-66-(SCH3)(2) composites show promising photocatalytic prospects in water splitting for hydrogen evolution under visible light irradiation. The composite materials exhibit excellent photocatalytic hydrogen production stability and high catalytic activity, which can be attributed to the synergistic effect between UiO-66-(SCH3)(2) and Ni2P.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Ning Li, Wenwen Zhao, Linping Li, Yangqin Gao, Lei Ge
Summary: Hollow cubic Cu2-xS@Ni-Mo-S nanocomposites were designed and synthesized, which showed significantly improved photocatalytic hydrogen performance compared to hollow Cu2-xS. The enhanced property can be attributed to the metallic behavior of bimetallic Ni-Mo-S lamellas and the localized surface plasmon resonance (LSPR) effect of Cu2-xS.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Qixiao Gai, Shoutian Ren, Xiaochun Zheng, Wenjun Liu, Quanli Dong
Summary: In this study, the photocatalytic performance of CdS was enhanced by pre-functionalizing CdS nanosheets with L-cysteine (L-Cys) to graft -COO- and -NH2 groups, followed by photo-deposition of Ag nanoparticles. The optimal hydrogen evolution rate and monochromatic apparent quantum efficiency were significantly improved, with L-Cys serving as bridging ligands to enhance the injection rate of hot electrons and the -COO- and -NH2 groups on CdS functioning as efficient co-catalytic centers.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Artur Movsesyan, Eva Yazmin Santiago, Sven Burger, Miguel A. Correa-Duarte, Lucas Besteiro, Zhiming Wang, Alexander O. Govorov
Summary: This paper addresses the challenging problem of obtaining a microscopic description of hot-electron states in plasmonic nanocrystals, and studies the spatial distributions of photophysical parameters controlling local surface photochemistry. The research shows that while the generation of energetic electrons and holes in small plasmonic nanocrystals with complex shapes is position-dependent and anisotropic, the phototemperature across the nanocrystal surface remains uniform. Understanding these mechanisms is crucial for designing efficient nanoantennas for photocatalytic applications.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xu Yuan, Wenlong Zhen, Sijia Yu, Can Xue
Summary: The study demonstrated the fabrication of core-shell-satellite Au@SiO2-Pt nanostructures and the initiation of photocatalytic hydrogen generation through plasmon coupling effect induced by LSPR excitation of the core Au nanoparticle. Further investigation revealed the formation of a strong local electric field between the Au core and Pt nanoparticles, enabling hot electron creation on the non-plasmonic-active Pt nanoparticles to participate in hydrogen evolution reaction on the Pt surface. Additionally, a small SiO2 shell thickness was found to be necessary for achieving efficient photocatalytic activities for hydrogen generation.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Materials Science, Ceramics
Nagina Bashir, Sonia Zulfiqar, Sana Munir, Mohamed M. Ibrahim, Manal F. Abou Taleb, Salah M. El-Bahy, Muhammad Suleman, Muhammad Shahid
Summary: Sodium doped vanadium pentaoxide (Na.V2O5) nanorods were successfully synthesized through hydrothermal method. The formation of nanorods structure for Na doped V2O5 was confirmed through structural, morphological and optical property studies. The photocatalytic efficiency of the synthesized Na-doped V2O5 samples showed improvement compared to pure V2O5 nanorods, with the Na.V2O5 (5 wt%) exhibiting the highest degradation rate for Rhodamine B dye.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yaqing Zhi, Yuan Yi, Chenxi Deng, Qiao Zhang, Siyuan Yang, Feng Peng
Summary: Introducing defect engineering into ZnO/ZnS heterojunction photocatalysts is an effective method to improve their visible light performance and photocatalytic efficiency. In this study, a defect-enriched ZnO/ZnS photocatalyst was synthesized through a hydrozincite intermediate-deriving reaction. The defect states endowed visible light response ability to both ZnO and ZnS components, leading to high photocatalytic activity and stability.
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)