Article
Optics
H. Agarwal, K. Nowakowski, A. Forrer, A. Principi, R. Bertini, S. Batlle-Porro, A. Reserbat-Plantey, P. Prasad, L. Vistoli, K. Watanabe, T. Taniguchi, A. Bachtold, G. Scalari, R. Krishna Kumar, F. H. L. Koppens
Summary: This study demonstrates a large ultra-broadband photoconductivity in twisted double bilayer graphene heterostructures with a spectral range of 2-100 μm. The unique properties of the twisted decoupled heterostructures enable parallel photoactive channels and strong photoconductivity enhancements. This research introduces a viable route for engineering gapped graphene photodetectors with three-dimensional scalability.
Article
Materials Science, Multidisciplinary
Drishti Khandelwal, Disha Jain, Pratima R. Solanki, Kumar Rakesh Ranjan, Maumita Das Mukherjee
Summary: An electrochemical biosensor for detecting low-density lipoprotein (LDL) was successfully fabricated using the rGO-CdSe QDs/ITO platform, showing a wide detection range. The modified electrodes were characterized using various techniques to study the AAB/rGO-CdSe QDs/ITO immunoelectrodes.
Article
Chemistry, Physical
Arun Ashokan, Paul Mulvaney
Summary: Solution-phase spectroelectrochemistry was used to study electron injection into colloidal CdSe quantum dots in THF. The results showed reversible optical changes on a time-scale of minutes, with the injection of electrons leading to quenching of photoluminescence. The number of electrons injected into the QDs depended on the electrode potential and QD size, with most injection occurring below the band edge.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Kaixiang Chen, Chufan Zhang, Xiaoxian Zang, Fuyuan Ma, Yuanzhen Chen, Yaping Dan
Summary: Coating graphene with quantum dots enhances light absorption and leads to high photogain. Light illumination narrows down the surface depletion region, creating a photovoltage that gates the graphene, resulting in high photogain in graphene.
Article
Chemistry, Analytical
Dongquan Leng, Jihao Zhao, Xiang Ren, Rui Xu, Lei Liu, Xuejing Liu, Yuyang Li, Qin Wei
Summary: In this study, a split-type immunoassay strategy initiated by cation exchange and altering the capacity of an electron donor was optimized, using MoSe2/CdSe as a photoelectrode substrate and silver ions as the initiator of CE. The combination of ascorbate oxidase with MSNs improved the sensor's sensitivity and reliability, resulting in a broad linear range and low detection limit when applied to neuron-specific enolase.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Zhenyuan Ji, Dongwei Ma, Wenyao Dai, Kai Liu, Xiaoping Shen, Guoxing Zhu, Yunjin Nie, Drolma Pasang, Aihua Yuan
Summary: This study demonstrates the construction of advanced cathode materials for high energy density hybrid supercapacitors using a hydrothermal strategy. The NCH/NCQDs nanosheets show excellent electrochemical performance and cycling stability, indicating great potential for renewable energy storage applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Spectroscopy
Zhenping Liu, Jun Zhou, Xianfeng Wang, Jinsong Zhao, Peng Zhao, Yi Ma, Suyi Zhang, Danqun Huo, Changjun Hou, Kang Ren
Summary: In this work, a novel aptasensor based on the fluorescence quenching property of graphene oxide (GO) and the fluorescence characteristic of cadmium selenide quantum dots (CdSe QDs) was developed for highly sensitive detection of fluoroquinolones contamination. The aptasensor showed reliable detection performance and promising potential for the detection of fluoroquinolones.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Physics, Applied
Haotong Meng, Fen Zhang, Zhangxun Mo, Qinglin Xia, Mianzeng Zhong, Jun He
Summary: The influence of CdSe quantum dots (QDs) modification on the physical properties of 2D WSe2 was studied in this work. The energy transfer in heterostructures was observed after the modification, confirmed by photoluminescence and Raman results. The phototransistors based on the WSe2/CdSe QDs heterostructure exhibited an ambipolar characteristic and showed significant improvement in performance compared to the WSe2 based device. The hybridization of 0D QDs and 2D material is a suitable and effective approach to enhance the photodetection ability and achieve ambipolar photodetection in multifunctional optoelectronic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Matthew Ciesler, Damien West, Shengbai Zhang
Summary: Molecular linkers like cysteine are used to stabilize colloidal quantum dots and facilitate charge transfer. Through first-principles calculations, researchers found that deprotonated ligands interact with both sides of a three-way heterostructure, leading to successful self-passivation and the formation of a charge-transfer state.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Maria Mukhtar, Muhammad Mubeen, Anwar Ul-Hamid, Sule Erten Ela, Azhar Iqbal
Summary: Combining halide perovskite NCs with graphene to design heterostructures shows promise for energy applications, optoelectronics, and photocatalysis. Understanding interfacial charge transfer (CT) dynamics is crucial for the optoelectronic applications of perovskite NC-graphene heterostructures. This study investigates the influence of different surface functionalities of graphene on CT dynamics in FAPbBr(3) NCs attached to functionalized graphene heterostructures. Functionalized graphenes, such as graphene oxide (GO) and amino acids (alanine, tyrosine, and cysteine) functionalized GO, were synthesized and their heterostructures with NCs resulted in quenching of the FAPbBr(3) NCs' photoluminescence (PL). The study demonstrates that the rate of CT and charge transfer efficiency strongly depend on the nature of the functionalizing moieties, with cysteine-functionalized graphene showing the highest hole transfer efficiency.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Analytical
Tanveer A. Tabish, Hasan Hayat, Aumber Abbas, Roger J. Narayan
Summary: Early detection of AMI is crucial for patient care. Electrochemical biosensors integrated with graphene quantum dots (GQDs) offer accurate, reliable, early, and reversible diagnosis of AMI, with advantages such as low biomarker consumption, reusability of the electrode, and strong interactions between GQDs and the target analyte.
Article
Materials Science, Multidisciplinary
Zhu Meng, Benoit Mahler, Julien Houel, Florian Kulzer, Andrey Vasil'ev, Christophe Dujardin
Summary: This study investigates the impact of shell thickness on the response of CdSe / CdS core-crown and CdSe / CdZnS core-shell nanoplatelets under X-ray and intense optical excitation. The results demonstrate that the interaction between excitons in the bi-exciton changes from attractive to repulsive when the design changes from core/crown to thick quasi type II core/shell 2D nanostructures. The addition of a 0.4 nm shell layer is sufficient to change the emission of bi-excitons from red-shifted to non- or blue-shifted. The findings also show that multiexcitons are generated in all 2D nanostructures under pulsed X-ray excitation, but their presence cannot be detected in emission spectra for NPL thicknesses larger than 2 nm. Numerical estimation reveals that the formation of biexcitons with ultra-fast time response is more efficient in thick NPLs, but this advantage is counterbalanced by a blue-shifted emission, making large NPLs less effective in addressing the self-absorption issue.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Physical
Bastiaan B. Salzmann, Jur de Wit, Chen Li, Daniel Arenas-Esteban, Sara Bals, Andries Meijerink, Daniel Vanmaekelbergh
Summary: This study prepared two-dimensional CdSe-PbSe heterostructures and PbSe NPLs through Pb2+-for-Cd2+ cation exchange and characterized the intermediary NCs with advanced microscopy and spectroscopy techniques. The growth of PbSe domains in CdSe NPLs occurs through the replacement of zinc blende CdSe lattice with rock salt PbSe phase while preserving the anion sublattice. Temperature-dependent emission measurements reveal size-dependent change of band gap energy and the influence of the anisotropic shape.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Caitlin R. McGranahan, Guy E. Wolfe, Alejandro Falca, David F. Watson
Summary: The study utilized N,N'-dicyclohexylcarbodiimide (DCC) coupling chemistry to synthesize heterostructures of CdSe and CdTe quantum dots in colloidal dispersions, as well as immobilizing them on metal oxide thin films. The DCC-mediated formation of amide bonds between terminal carboxylic acid and amine groups of ligands on different QDs drove the formation of heterostructures, selectively yielding dispersed or immobilized structures with programmable compositions and energetic offsets. The results showed that the carbodiimide coupling chemistry can efficiently tether colloidal QDs selectively and covalently, enabling excited-state interfacial electron transfer.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Hui Zhang, Xiaohu Mi, Bowen Kang, Yunkai Wu, Tingting Zhang, Pai Liu, Xiaowei Sun, Zhenglong Zhang, Ning Liu, Hongxing Xu
Summary: Colloidal nanocrystals play a significant role in optoelectronic devices and their properties can be improved through ligand modification, which can enhance charge transport and emission characteristics in LEDs.
Editorial Material
Chemistry, Physical
M. V. Sangaranarayanan, Vijayamohanan K. Pillai
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Electrochemistry
Jaison Joy, Archana Sekar, Saranyan Vijayaraghavan, Prem T. Kumar, Vijayamohanan K. Pillai, Subbiah Alwarappan
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Nanoscience & Nanotechnology
Subhabrata Mukhopadhyay, Joyashish Debgupta, Chandani Singh, Rudraditya Sarkar, Olivia Basu, Samar K. Das
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Electrochemistry
Avanish Shukla, P. Dhanasekaran, N. Nagaraju, Santoshkumar D. Bhat, Vijayamohanan K. Pillai
ELECTROCHIMICA ACTA
(2019)
Article
Chemistry, Physical
Manila Ozhukil Valappil, Krati Joshi, Lisa John, Sailaja Krishnamurthy, Bikash Jana, Amitava Patra, Vijayamohanan K. Pillai, Subbiah Alwarappan
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2019)
Article
Chemistry, Physical
Munaiah Yeddala, Demudu Babu Gorle, M. Anbu Kulandainathan, P. Ragupathy, Vijayamohanan K. Pillai
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Chemistry, Physical
Avanish Shukla, P. Dhanasekaran, S. Sasikala, N. Nagaraju, Santoshkumar D. Bhat, Vijayamohanan K. Pillai
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Chemistry, Multidisciplinary
Munaiah Yeddala, Tharangattu N. Narayanan, Ragupathy Pitchai, Vijayamohanan K. Pillai
Article
Engineering, Chemical
Avanish Shukla, P. Dhanasekaran, S. Sasikala, N. Nagaraju, Santoshkumar D. Bhat, Vijayamohanan K. Pillai
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Manila Ozhukil Valapil, Jamal S. Mohamed, Subbiah Alwarappan, Vijayamohanan K. Pillai
MATERIALS RESEARCH EXPRESS
(2020)
Review
Chemistry, Multidisciplinary
Manila Ozhukil Valappil, Subbiah Alwarappan, Vijayamohanan K. Pillai
Summary: Phosphorene quantum dots (PQDs) are unique zero-dimensional nanostructures with special physicochemical and surface properties. Considerable progress has been made in PQD research in catalysis, particularly in the fields of photocatalysis and electrocatalysis. This review systematically summarizes the synthesis methods and physicochemical properties of PQDs, and critically discusses their potential applications and future prospects in catalysis.
Article
Chemistry, Inorganic & Nuclear
Panjo Lepcha, Sachidulal Biswas, Srijan Narayan Chowdhury, Suranjana Bose, Joyashish Debgupta, Satadal Paul, Achintesh N. N. Biswas
Summary: A Co(III)-hydroxo complex, [Co-III(dpaq)OH]ClO4 catalyses water oxidation with high efficiency and kinetics. The electrochemical results and theoretical calculations reveal the occurrence of both metal and ligand centered proton-coupled electron transfer processes during anodic scanning. The role of axial ligand in water oxidation has been examined and confirmed.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Bikash Ranjan Isaac, Subbiah Alwarappan, Vijayamohanan K. Pillai
Summary: In this study, a transformation of multiwalled carbon nanotubes to graphene nanoribbons and graphene quantum dots was achieved through an ionic liquid-assisted electrochemical approach. The tunability of interlayer spacing and the introduction of heteroatoms in carbon nanotubes could significantly impact the mechanical and electrical properties of the resulting nanoribbons. This research highlights the importance of van der Waals gap engineering in designing advanced 2D materials and their composites for various applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
S. Anantharaj, Manila O. Valappil, K. Karthick, Vijayamohanan K. Pillai, Subbiah Alwarappan, Subrata Kundu
CATALYSIS SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Physical
Rani Mohan Ramsundar, Vijayamohanan Kunjukrishna Pillai, Pattayil Alias Joy
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Chemistry, Multidisciplinary
Laetitia Bardet, Herve Roussel, Stefano Saroglia, Masoud Akbari, David Munoz-Rojas, Carmen Jimenez, Aurore Denneulin, Daniel Bellet
Summary: The thermal instability of silver nanowires leads to increased electrical resistance in AgNW networks. Understanding the relationship between structural and electrical properties of AgNW networks is crucial for their integration as transparent electrodes in flexible optoelectronics. In situ X-ray diffraction measurements were used to study the crystallographic evolution of Ag-specific Bragg peaks during thermal ramping, revealing differences in thermal and structural transitions between bare and SnO2-coated AgNW networks.
Article
Chemistry, Multidisciplinary
Nathalia Cancino-Fuentes, Arnau Manasanch, Joana Covelo, Alex Suarez-Perez, Enrique Fernandez, Stratis Matsoukis, Christoph Guger, Xavi Illa, Anton Guimera-Brunet, Maria V. Sanchez-Vives
Summary: This study provides a comprehensive characterization of graphene-based solution-gated field-effect transistors (gSGFETs) for brain recordings, highlighting their potential clinical applications.
Article
Chemistry, Multidisciplinary
Sikandar Aftab, Hailiang Liu, Dhanasekaran Vikraman, Sajjad Hussain, Jungwon Kang, Abdullah A. Al-Kahtani
Summary: This study examines the effects of hybrid nanoparticles made of NiO@rGO and NiO@CNT on the active layers of polymer solar cells and X-ray photodetectors. The findings show that these hybrid nanoparticles can enhance the charge carrier capacities and exciton dissociation properties of the active layers. Among the tested configurations, the NiO@CNT device demonstrates superior performance in converting sunlight into electricity, and achieves the best sensitivity for X-ray detection.
Article
Chemistry, Multidisciplinary
Hyo Jung Shin, Seung Gyu Choi, Fengrui Qu, Min-Hee Yi, Choong-Hyun Lee, Sang Ryong Kim, Hyeong-Geug Kim, Jaewon Beom, Yoonyoung Yi, Do Kyung Kim, Eun-Hye Joe, Hee-Jung Song, Yonghyun Kim, Dong Woon Kim
Summary: This study investigates the role of SOX9 in reactive astrocytes following ischemic brain damage using a PLGA nanoparticle plasmid delivery system. The results demonstrate that PLGA nanoparticles can reduce ischemia-induced neurological deficits and infarct volume, providing a potential opportunity for stroke treatment.
Article
Chemistry, Multidisciplinary
Anurag Chaudhury, Koushik Debnath, Nikhil R. Jana, Jaydeep K. Basu
Summary: The study investigates the interaction between nanoparticles and cell membranes, and identifies key parameters, including charge, crowding, and membrane fluidity, that determine the adsorbed concentration and unbinding transition of nanoparticles.
Article
Chemistry, Multidisciplinary
Sina Sadeghi, Fazel Bateni, Taekhoon Kim, Dae Yong Son, Jeffrey A. Bennett, Negin Orouji, Venkat S. Punati, Christine Stark, Teagan D. Cerra, Rami Awad, Fernando Delgado-Licona, Jinge Xu, Nikolai Mukhin, Hannah Dickerson, Kristofer G. Reyes, Milad Abolhasani
Summary: In this study, an autonomous approach for the development of lead-free metal halide perovskite nanocrystals is presented, which integrates a modular microfluidic platform with machine learning-assisted synthesis modeling. This approach enables rapid and optimized synthesis of copper-based lead-free nanocrystals.
Article
Chemistry, Multidisciplinary
Zahir Abbas, Nissar Hussain, Surender Kumar, Shaikh M. Mobin
Summary: The rational construction of free-standing and flexible electrodes for electrochemical energy storage devices is an emerging research focus. In this study, a redox-active metal-organic framework (MOF) was prepared on carbon nanofibers using an in situ approach, resulting in a flexible electrode with high redox-active behavior and unique properties such as high flexibility and lightweight. The prepared electrode showed excellent cyclic retention and rate capability in supercapacitor applications. Additionally, it could be used as a freestanding electrode in flexible devices at different bending angles.
Article
Chemistry, Multidisciplinary
Lishan Zhang, Xiaoting Zhang, Hui Ran, Ze Chen, Yicheng Ye, Jiamiao Jiang, Ziwei Hu, Miral Azechi, Fei Peng, Hao Tian, Zhili Xu, Yingfeng Tu
Summary: Photodynamic therapy (PDT) is a promising local treatment modality in cancer therapy, but its therapeutic efficacy is restricted by ineffective delivery of photosensitizers and tumor hypoxia. In this study, a phototactic Chlorella-based near-infrared (NIR) driven green affording-oxygen microrobot system was developed for enhanced PDT. The system exhibited desirable phototaxis and continuous oxygen generation, leading to the inhibition of tumor growth in mice. This study demonstrates the potential of using a light-driven green affording-oxygen microrobot to enhance photodynamic therapy.
Article
Chemistry, Multidisciplinary
Yujin Li, Jing Xu, Xinqi Luo, Futing Wang, Zhong Dong, Ke-Jing Huang, Chengjie Hu, Mengyi Hou, Ren Cai
Summary: In this study, hollow heterostructured materials were constructed using an innovative template-engaged method as cathodes for zinc-ion batteries. The materials exhibited fast Zn2+ transport channels, improved electrical conductivity, and controlled volume expansion during cycling. The designed structure allowed for an admirable reversible capacity and high coulombic efficiency.
Article
Chemistry, Multidisciplinary
Paritosh Mahato, Shashi Shekhar, Rahul Yadav, Saptarshi Mukherjee
Summary: This study comprehensively elucidates the role of the core and electrostatic surface of metal nanoclusters in catalytic reduction reactions. The electrostatic surface dramatically modulates the reactivity of metal nanoclusters.
Article
Chemistry, Multidisciplinary
Pei Liu, Mengdi Liang, Zhengwei Liu, Haiyu Long, Han Cheng, Jiahe Su, Zhongbiao Tan, Xuewen He, Min Sun, Xiangqian Li, Shuai He
Summary: This study demonstrates a simple and environmentally-friendly method for the synthesis of zinc oxide nanozymes (ZnO NZs) using wasted hop extract (WHE). The WHE-ZnO NZs exhibit exceptional peroxidase-like activity and serve as effective catalysts for the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). In addition, a straightforward colorimetric technique for detecting both H2O2 and glucose was developed using the WHE-ZnO NZs as peroxidase-like catalysts.
Article
Chemistry, Multidisciplinary
Hyunkyu Oh, Young Jun Lee, Eun Ji Kim, Jinseok Park, Hee-Eun Kim, Hyunsoo Lee, Hyunjoo Lee, Bumjoon J. Kim
Summary: Mesoporous carbon particles have unique structural properties that make them suitable as support materials for catalytic applications. This study investigates the impact of channel nanostructures on the catalytic activity of porous carbon particles (PCPs) by fabricating PCPs with controlled channel exposure on the carbon surface. The results show that PCPs with highly open channel nanostructures exhibit significantly higher catalytic activity compared to those with closed channel nanostructures.
Article
Chemistry, Multidisciplinary
Yunjie Lu, Zhaohui Li, Zewei Li, Shihao Zhou, Ning Zhang, Jianming Zhang, Lu Zong
Summary: A tough, long-lasting adhesive and highly conductive nanocomposite hydrogel (PACPH) was fabricated via the synergy of interfacial entanglement and adhesion group densification. PACPH possesses excellent mechanical properties, interfacial adhesion strength, and conductivity, making it a promising material for long-term monitoring of human activities and electrocardiogram signals.
Article
Chemistry, Multidisciplinary
Zichao Wei, Audrey Vandergriff, Chung-Hao Liu, Maham Liaqat, Mu-Ping Nieh, Yu Lei, Jie He
Summary: We have developed a simple method to prepare polymer-grafted plasmonic metal nanoparticles with pH-responsive surface-enhanced Raman scattering. By using pH-responsive polymers as ligands, the aggregation of nanoparticles can be controlled, leading to enhanced SERS. The pH-responsive polymer-grafted nanoparticles show high reproducibility and sensitivity in solution, providing a novel approach for SERS without the need for sample pre-concentration.
Article
Chemistry, Multidisciplinary
Melis Ozge Alas Colak, Ahmet Gungor, Merve Buldu Akturk, Emre Erdem, Rukan Genc
Summary: This research investigates the effect of functionalizing carbon dots with hydroxyl polymers on their performance as electrode materials in a supercapacitor. The results show that the functionalized carbon dots exhibit excellent electrochemical performance and improved stability.
