Review
Chemistry, Physical
Meng Wang, Fengren Cao, Liang Li
Summary: Metal halide perovskite nano/microwires (NMWs) are promising building blocks for next-generation optoelectronic devices due to their well-defined crystal structure, fewer grain boundaries, lower defect concentration, longer photocarrier lifetime, and confined carrier transport. Various synthesis methods have been developed to construct NMW-based optoelectronic devices, but further research is needed to understand the relationship between NMW morphologies and optoelectronic properties for broader applications.
Article
Optics
Smruti Medha Mishra, Biswarup Satpati
Summary: ZnO nanorods were synthesized using a low-cost and low-temperature chemical synthesis method, with both ZnO and metal serving as the seed layer. The addition of gold nanoparticles on the surface of ZnO structures enhanced their visible emissions. The optical band gap of the Au-ZnO heterostructure was found to be lower than that of ZnO nanorods, and the band gap energy can be tuned, which is important for room temperature optical devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Weicheng Lei, Zhiwei Luo, Yao He, Ping Zhang, Songxuan Liu, Anxian Lu
Summary: The addition of ZrO2 enhances the crystallization ability of glass, reduces the grain size of ZnO nano-crystallines, and increases the bandgap and defect-related emission intensity of ZnO. After heat treatment, the glass-ceramics maintain high transparency, and the ZnO crystals exhibit the highest yellow emission intensity at a ZrO2 doping concentration of 2.5 mol%.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Gustavo M. Fortes, Andre L. da Silva, Lorena B. Caliman, Fabio C. Fonseca, Douglas Gouvea
Summary: In this study, interfacial segregation was explored as a strategy to enhance the electrical conductivity of Cl--doped ZnO. Cl-anions were found to segregate at the surface and grain boundaries, leading to a significant reduction in electrical resistivity. The calculated electric potential barrier height and activation energy for conduction also decreased with Cl-doping.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
M. A. Osman, A. G. Abd-Elrahim, E. R. Shaaban, Manar A. Ali
Summary: Ternary alloys of Zn0.78Cd0.22S nanoparticles were synthesized and their optical properties were tailored through thermal annealing and UV irradiation. The annealing process led to phase transformation and increased crystalline size, while UV irradiation increased the band gap.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Chenguang Xin, Changjiang Fan, Zhongyao Zhang, Yanru Zhou
Summary: In this study, we demonstrate the growth of optical waveguiding CdTe nano-/microwires via chemical vapor deposition. By controlling the growth parameters, we are able to tailor the architecture and crystallographic phases of the nano-/microwires. Dislocation-driven growth of CdTe nano-/microwires is observed for the first time. These nano-/microwires exhibit excellent single-crystal structure and waveguiding properties, showing great potential for applications in waveguiding and nonlinear optics.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Engineering, Electrical & Electronic
Ahmed A. Aboud, Ayan Mukherjee, M. Al-Dossari, N. S. Abd EL-Gawaad, Ahmed M. Saad
Summary: We report the formation of hexagonal nano-sheets of pure and Co-doped ZnO thin films using aerosol-assisted chemical vapor deposition technique. Two phases of ZnO, Wurtzite and Zinc blende, were observed in the films by X-Ray diffraction. Scanning electron microscope images show the formation of hexagonal nano-sheets on the substrate surface. Beer's law was used to determine the band gap of the films. The performance of both films as UV detectors was investigated, with the response/decay time showing large values. Co-doping decreased the response time while increasing the decay time. The Co-doped ZnO films exhibited a minimum response time of 4s at 5V applied voltage, but had a lower gain value compared to the pure film.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Mina Rabizadeh, Mohammad Hossein Ehsani
Summary: The effect of annealing on ZnO/Cu/ZnO films was investigated, and the structural, optical, and thermal properties of the films were evaluated. The results showed that the ZnO/Cu/ZnO sample annealed at 400 degrees C had the lowest resistivity, highest transmittance, and lowest emissivity, making it suitable for energy-saving applications such as building windows.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Siyi Liu, Longshan Zhu, Wanshan Cao, Peiding Li, Zhuolin Zhan, Zihang Chen, Xi Yuan, Jin Wang
Summary: In this research, monodispersed Mg-doped ZnO nanoparticles were synthesized through low temperature hydrothermal method, showing improved optical band gap and photoluminescence performance with increasing Mg content. The visible emission band consists of green, yellow, and red emission bands associated with different defect states, which can be explained by the analysis of Mg content- and temperature-dependent photoluminescence spectra.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Applied
Hongxi Zhu, Juan Jia, Wei Liu, Di Jiang, Zhuxin Li, Zengliang Shi, Qiannan Cui, Bin Liu, Chunxiang Xu
Summary: This paper develops a cryogenic thermistor based on the negative temperature coefficient (NTC) response of single crystal ZnO microwires. The study investigates the relationship between defects and the NTC effect, and proposes an optimized design for high-performance temperature sensors. The results suggest that zinc interstitials in ZnO microwires are effective donors for the sensitive NTC effect at cryogenic temperatures.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Abdullah Goktas, Sait Modanli, Ahmet Tumbul, Ahmet Kilic
Summary: The study investigated the photodegradation of methylene blue under UV light and the photocatalytic activity of various ZnO structures. It found that factors such as grain size, microstrain, and Co doping significantly influenced the performance, with a decrease in photocatalytic efficiency observed with 5% Co doping and p-n homojunction formation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Ahmed H. Hammad, Ahmed R. Wassel, G. O. Rabie, Samir Y. Marzouk
Summary: Strontium zinc phosphate glasses containing neodymium ions were prepared. The presence of phosphate groups in the Q2 mode overlapping with Zn-O and Sr-O bonds was observed in the current glasses. The replacement of SrO with Nd2O3 increased the glass density. The optical transition was found to be an indirect transition with varying values. The absorption spectra showed distinct peaks due to the presence of Nd2O3, and the emission spectra suggested possible emission of NIR lasers at specific wavelengths.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
A. C. Garcia-Velasco, A. Baez-Rodriguez, M. Bizarro, R. M. Calderon-Olvera, J. Hernandez-Torres, L. Garcia-Gonzalez, L. Zamora-Peredo
Summary: ZnO nanostructures with various morphologies were successfully synthesized using a simple solution route. The morphology of the nanostructures was found to depend strongly on the concentration of ZnCl2 and the hydrothermal synthesis time. The synthesized samples exhibited good crystallinity and high yellow-orange emission, indicating the presence of surface defect states.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Zilan Wang, Zhigang Wang, Francis C. C. Ling, Zhicheng Su
Summary: The emission of ZnO thin films is enhanced by Ar and H-2 plasma treatments, and an extraordinary recombination mechanism is discovered.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Zilan Wang, Zhigang Wang, Francis C. C. Ling, Zhicheng Su
Summary: The emission performance of ZnO thin films is enhanced by plasma treatments, leading to an increase in intensity and broadening of the spectrum. The asymmetric broadening is attributed to strong electron-phonon coupling. This finding has significant implications for understanding and improving the optoelectronic device performance of other materials with strong phonon interaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Mao Wang, Ye Yu, Slawomir Prucnal, Yonder Berencen, Mohd Saif Shaikh, Lars Rebohle, Muhammad Bilal Khan, Vitaly Zviagin, Rene Hubner, Alexej Pashkin, Artur Erbe, Yordan M. Georgiev, Marius Grundmann, Manfred Helm, Robert Kirchner, Shengqiang Zhou
Summary: The occurrence of mid-infrared localized surface plasmon resonances (LSPR) in thin Si films hyperdoped with tellurium (Te) is demonstrated in this study. By fabricating two-dimensional arrays of micrometer-sized antennas in a Te-hyperdoped Si chip, the mid-infrared LSPR can be further enhanced and extended to the far-infrared range. This finding opens up the possibility of integrating plasmonic sensors with the on-chip CMOS platform, greatly advancing the mass manufacturing potential of high-performance plasmonic sensing systems.
Article
Materials Science, Multidisciplinary
Xinyi Xia, Nahid Sultan Al-Mamun, Chaker Fares, Aman Haque, Fan Ren, Anna Hassa, Holger von Wenckstern, Marius Grundmann, S. J. Pearton
Summary: This study used X-ray photoelectron spectroscopy to measure the valence band offsets of Al2O3 deposited on α-(AlxGa1-x)(2)O-3 alloys. The results showed that the band alignment was type I at lower Al contents and staggered at higher Al contents.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Philipp Storm, Susanne Selle, Holger von Wenckstern, Marius Grundmann, Michael Lorenz
Summary: Transparent, p-type semiconductor copper iodide (CuI) thin films were grown via pulsed laser deposition on SrF2(111) using water soluble sacrificial layers of sodium bromide (NaBr). The resulting CuI thin films are single crystalline with reduced surface roughness compared to epitaxial CuI grown with rotational domains on other templates. The CuI thin films were subsequently transferred onto glass using epoxy/glue and dissolution of NaBr in a water-vapor atmosphere.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Optics
K. Dorywalski, O. Lupicka, M. Grundmann, C. Sturm
Summary: A new method for evaluating experimental data from spectroscopic ellipsometry is proposed, which combines the global-search optimization algorithm with statistical model selection criteria. This method is able to find the optical model parameters and select the optimal dielectric function model for describing the optical properties of materials even with limited initial knowledge.
ADVANCED OPTICAL TECHNOLOGIES
(2022)
Article
Physics, Condensed Matter
Evgeny Krueger, Volker Gottschalch, Gabriele Benndorf, Ron Hildebrandt, Ana Lucia Pereira, Michael S. Bar, Steffen Blaurock, Stefan Merker, Chris Sturm, Marius Grundmann, Harald Krautscheid
Summary: This study presents the epitaxial growth of AgxCu1-xI alloy layers and isolated small crystals on Al2O3 (0001) using the close distance sublimation (CDS) technique. Single-phase gamma-AgxCu1-xI thin films are obtained up to an Ag content of approximately 0.5, with the beta-phase also observed at higher Ag contents. The epitaxial relationships between the deposited AgxCu1-xI layers and the Al2O3 substrate, as well as the structure type, are discussed for different alloy compositions. Additionally, a method for depositing polycrystalline single-phase gamma-AgxCu1-xI thin films for Ag contents up to approximately 0.7 is presented based on the solid-state reaction of AgI layers on Al2O3 (0001) substrate with CuI. Furthermore, it is shown that the near-band-edge emission at 2 K is dominated by excitonic recombination, and the spectral position of the emission profile can be tuned by the alloy composition.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Jon Borgersen, Robert Karsthof, Vegard Ronning, Lasse Vines, Holger von Wenckstern, Marius Grundmann, Andrej Yu Kuznetsov, Klaus Magnus Johansen
Summary: Significant resistivity variations have been observed in oxides subjected to low ion doses, which cannot be explained by bulk defects. A comparative study of In2O3-based oxides revealed correlations between resistivity evolution, low ion doses, and UV illumination. The resistivity drops were attributed to oxygen desorption facilitated by irradiation/illumination, as confirmed by post-irradiation exposure to oxygen atmosphere.
Article
Nanoscience & Nanotechnology
Tanja Jawinski, Chris Sturm, Roland Clausing, Heiko Kempa, Marius Grundmann, Roland Scheer, Holger von Wenckstern
Summary: In this study, indium sulfide (In2S3) thin films were deposited on glass and sapphire substrates by physical co-evaporation. The structural properties of the films were optimized by varying the deposition parameters. The sample grown epitaxially on an α-sapphire substrate exhibited the smoothest surface and highest crystallinity. The optical absorption properties were found to be independent of the deposition parameters and substrate material. Weak and strong absorption onsets were observed at 1.7 eV and 2.5 eV, respectively, which were attributed to direct band-band transitions at 2.1 eV and 2.7 eV. The electrical characterization revealed photovoltaic activity but low performance due to non-ideal heterojunction properties. A strong and persistent photoconductivity was also observed, resulting in a time-dependent dark resistivity after light exposure.
Article
Materials Science, Multidisciplinary
Michael Seifert, Evgeny Krueger, Michael S. Bar, Stefan Merker, Holger von Wenckstern, Harald Krautscheid, Marius Grundmann, Chris Sturm, Silvana Botti
Summary: We studied the dielectric function of CuBrxI1-x thin film alloys using spectroscopic ellipsometry and density functional theory calculations. The features in the dielectric function were attributed to electronic transitions at specific k-points in the Brillouin zone, and the band gap bowing was discussed in terms of physical and chemical contributions. The band splitting at the top of the valence band decreased with increasing Br-concentration, which can be understood by considering the contribution of copper d orbitals to the valence band maximum.
PHYSICAL REVIEW MATERIALS
(2022)
Review
Materials Science, Coatings & Films
Laurenz Thyen, Daniel Splith, Max Kneiss, Marius Grundmann, Holger von Wenckstern
Summary: We introduce a new technique, MARS-PLD, for area-selective physical vapor deposition. By using a movable mask, we can selectively mask any desired area on a substrate to create multinary material composition gradients. We demonstrated the capabilities of this method by fabricating material gradients in (Mg,Zn)O thin films and on predefined two-dimensional patterns.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Nanoscience & Nanotechnology
Evgeny Krueger, Michael Seifert, Volker Gottschalch, Harald Krautscheid, Claudia S. Schnohr, Silvana Botti, Marius Grundmann, Chris Sturm
Summary: We studied the excitonic transition energy E-0 and spin-orbit split-off energy Delta(0) of gamma-AgxCu1-xI alloy thin films using reflectivity measurements at temperatures between 20 K and 290 K. The observed bowing behavior of the E-0 transition as a function of alloy composition is explained based on first-principles band structure calculations. The spin-orbit coupling increases with increasing Ag-content, and the temperature-dependent bandgap shift decreases with increasing Ag-content.
Article
Physics, Applied
Andreas Mueller, Sebastian Henn, Evgeny Krueger, Steffen Blaurock, Harald Krautscheid, Marius Grundmann, Chris Sturm
Summary: We report on the photoluminescence emission in copper iodide bulk single crystals induced by two- and three-photon absorption around 1.525eV. The non-linear optical processes were investigated through density-dependent, steady-state, and time-resolved photoluminescence spectroscopy. We observed that the photoluminescence intensity showed an almost parabolic behavior with the excitation power when the excitation energy corresponded to half of the bandgap energy. We also found a cubic contribution that increased with decreasing excitation energy. The ratio between the two- and three-photon absorption cross sections was determined to be approximately 10(-28) cm(2)s.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Condensed Matter
Marius Grundmann
Summary: This study revisits the problem of potential, electrical field, and charge density in a space charge region. Using the Boltzmann approximation, an analytical asymptotic solution is obtained. The exact solution can be found by numerically integrating an analytical function. A comparison is made with the popular abrupt (or depletion) approximation, and an analytical approximation is provided. The analytical approximation for potential, electrical field, and charge density in a space charge (depletion) region shows good agreement with the (numerically) exact solution.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Instruments & Instrumentation
Michael Lorenz, Holger Hochmuth, Holger von Wenckstern, Marius Grundmann
Summary: Pulsed laser deposition (PLD) is a highly flexible physical growth technique for thin films of functional materials. This article describes a relatively simple and reliable concept of PLD hardware that enables deposition on large areas (up to 4 inches in diameter) and tailored lateral and vertical composition spreads without the need for time-consuming hardware changes. Different PLD approaches have been implemented in various chambers by using specific and correlated computer-controlled movements of the target, substrate, and masks, along with an appropriate target phase composition.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Nanoscience & Nanotechnology
Fabian Schoeppach, Daniel Splith, Holger von Wenckstern, Marius Grundmann
Summary: In this study, metal-semiconductor field-effect transistor (MESFET) devices based on pulsed laser deposition (PLD) grown In2O3 thin films are reported. These devices exhibit on-off ratios exceeding 6 orders of magnitude and low sub-threshold swing values close to the thermodynamic limit. Oxygen plasma treatment and compensation doping with Mg are used to suppress the accumulation of electrons at the surface of In2O3, which is a major obstacle for its use as an active material in electronic devices.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Thomas Ruf, Stefan Merker, Frank Syrowatka, Philip Trempler, Georg Schmidt, Michael Lorenz, Marius Grundmann, Reinhard Denecke
Summary: This study focuses on the structural compatibility of perovskite BaTiO3 on garnet substrates Gd3Ga5O12 and Y3Fe5O12, with a particular emphasis on the growth behavior on different garnet orientations. It was found that BaTiO3 growth on the garnet (100) orientation showed good crystallinity, while growth on other orientations resulted in polycrystalline films.
MATERIALS ADVANCES
(2022)
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.
