Article
Multidisciplinary Sciences
Wei Liu, Viktor Ivady, Zhi-Peng Li, Yuan-Ze Yang, Shang Yu, Yu Meng, Zhao-An Wang, Nai-Jie Guo, Fei-Fei Yan, Qiang Li, Jun-Feng Wang, Jin-Shi Xu, Xiao Liu, Zong-Quan Zhou, Yang Dong, Xiang-Dong Chen, Fang-Wen Sun, Yi-Tao Wang, Jian-Shun Tang, Adam Gali, Chuan-Feng Li, Guang-Can Guo
Summary: Recent studies have shown that hexagonal boron nitride (hBN) contains optically polarized and detected electron spins, which can be utilized for implementing qubits and quantum sensors in nanolayered devices. In this study, we demonstrate and study the Rabi oscillation and related phenomena of a negatively charged boron vacancy (V-B(-)) spin ensemble in hBN. We report on different dynamics of the V-B(-) spins at weak and strong magnetic fields.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Kaikai Kou, Weiran Song, Weilun Gu, Jiacen Liu, Yuzhou Song, Jianxun Ji, Zongyu Hou, Zhe Wang
Summary: The multi-element detectable laser excited atomic fluorescence (LEAF) technique is a significant advancement in the analytical field with its high sensitivity and overcoming the color constraint. However, limited understanding of the universal signal enhancement mechanism hinders its further development and research. This study conducted LEAF experiments to investigate the details of the ablation process, excitation process, and coupling behavior. The findings propose new understandings, such as the ablated mass being plasma instead of just a plume and the contribution of photoexcitation to the enhanced signal.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Chemistry, Multidisciplinary
Ziying Tang, Huying Zheng, Yaqi Wang, Runchen Wang, Zhiren Qiu, Yan Shen, Jie Zhou, Shichen Su, Lin Li, Hai Zhu
Summary: This study demonstrates the realization of ultralow-threshold six-photon-excited upconversion lasing through cavity quantum electrodynamics effects in a plasmonic microcavity. The Purcell factor in hybrid whisper-gallery mode is significantly enhanced, leading to enhanced nonlinear light-matter interactions. In addition, the temperature and polarization characteristics of upconversion lasing via a plasmonic-WGM approach show distinct evolution compared to a bare microwire.
Article
Chemistry, Multidisciplinary
Arash Ahmadivand
Summary: This study reports on the near-ultraviolet light emission from enhanced tunneling of electrons using aluminum nanoelectrodes, which have high electron density and low screening capabilities compared to traditional noble metals. This breakthrough enables the generation of high-energy beams and accelerates the implementation of electrically tunable and ultradense UV light sources.
Article
Physics, Applied
Adawiya J. J. Haider, Fatima I. I. Sultan, Mohammed J. J. Haider, Bakr Ahmed Taha, Sharafaldin Al-Musawi, Mahdi S. Edan, Chadeer S. S. Jassim, Norhana Arsad
Summary: This paper investigates the influence of two-shaped nanoparticles as scatter centers on the performance emission of a random laser. The optimal nanocomposite film concentrations were found to be 10(-4) M for R6G dye and 0:184 x 10(13) cm(-3) for ZnO NPs. The ZnO NW nanocomposite film exhibited a FWHM of 13nm at a threshold energy of 8.65mJ, while the ZnO NF nanocomposite film had a FWHM of 11nm and a threshold energy of 4.8mJ.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Multidisciplinary Sciences
Nai-Jie Guo, Song Li, Wei Liu, Yuan-Ze Yang, Xiao-Dong Zeng, Shang Yu, Yu Meng, Zhi-Peng Li, Zhao-An Wang, Lin-Ke Xie, Rong-Chun Ge, Jun-Feng Wang, Qiang Li, Jin-Shi Xu, Yi-Tao Wang, Jian-Shun Tang, Adam Gali, Chuan-Feng Li, Guang-Can Guo
Summary: Optically active defects in hBN have not been coherently controlled yet. Guo et al. isolate a new carbon-related defect and achieve its coherent control by efficiently producing arrays of defects in hBN.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Zhengyan Huan, Yetian Huang, Yi Lei, Hanzi Huang, Haoshuo Chen, Bin Chen
Summary: We investigate the statistical properties of inherent intensity fluctuation in a low-cost and low-complexity self-homodyne coherent system using an amplified spontaneous emission (ASE) source. The noise distribution model of the system is established and shown to be highly consistent with experimental results. Advanced mappers and demappers are designed based on the proposed noise model. The optimized system reduces the need for ASE bandwidth and is evaluated using forward error correction codes. Additionally, an information rate increase of 6.67% is demonstrated compared to 64-QAM.
Article
Chemistry, Medicinal
Xue-Li Hao, Ai-Min Ren, Liang Zhou
Summary: Hydrogen sulfide (H2S) has important physiological and pathological roles, but abnormal levels can cause diseases. Researchers have explored the mechanism of a turn-on probe for H2S monitoring and investigated the effect of geometric modifications on optical properties. They found that introducing electron-withdrawing substituent groups in benzopyran can suppress molecular skeleton vibration and improve two-photon absorption (TPA) ability, making it a potential material for biological imaging and H2S detection.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2023)
Article
Chemistry, Physical
Shiyuan Gao, Hsiao-Yi Chen, Marco Bernardi
Summary: This study investigates the excited states and radiative lifetimes of over 20 native defects and carbon or oxygen impurities in hBN, generating a large dataset including emission energy, polarization, and lifetime. Variability across quantum emitters is found, with exciton energies ranging from 0.3 to 4 eV and radiative lifetimes from ns to ms for different defect structures. Bayesian statistical analysis identifies high-likelihood charge-neutral defect emitters, such as the native VNNB defect with emission energy and radiative lifetime in agreement with experiments. The work advances the microscopic understanding of hBN single-photon emitters and introduces a computational framework for characterizing and identifying quantum emitters in 2D materials.
NPJ COMPUTATIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Atiqah Nabieha Azmi, Wan Maryam Wan Ahmad Kamil, Haslan Abu Hassan, Wan Zakiah Wan Ismail, Otto L. Muskens
Summary: A novel method of doping Aluminum (Al) into zinc oxide (ZnO) nanorods by a simple chemical dip process is evaluated in terms of its performance in random lasing. The ZnO nanorods were synthesized using chemical bath deposition (CBD) method at 96 degrees C for 3 h. The nanorods were then dipped in a fixed doping solution concentration, and the dip time was varied between 0 s and 80 s. Doping ZnO nanorods in aluminum nitrate nonahydrate solution for 40 s contributes to random lasing with the lowest threshold value of 12.48 mJ/cm2 and a spectral width of 2.12 nm.
Article
Chemistry, Physical
Jin-Wei Hu, Jie Yu, Yong-Chang Han
Summary: We investigated the thermal photoassociation dynamics of Mg atoms from the X-1 sigma(+)(g) state to the (1)(1)pi(g) state, or to three other higher excited states i) = (1)(1)pi(u), (2)(1)pi(u), (2)(1)sigma(+)(u). Different transition paths were formed through weak two-photon coupling, strong three-photon couplings, and one-photon couplings. The major path was found to be X-1 sigma(+)(g) +3PLANCK CONSTANT OVER TWO PI omega i)? g ? - PLANCK CONSTANT OVER TWO PI omega(1)(1)pi(g), followed by a V-type Raman transition path from |i) to (1)(1)pi(g).
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Shuangyang Zou, Xiaoan Zhao, Jing Lyu, Wenze Ouyang, Ruibin Liu, Shenghua Xu
Summary: In this study, room-temperature amplified spontaneous emission of Fe-doped CsPbBr3 crystal microwire was demonstrated under the excitation of a continuous-wave laser. The introduction of Fe dopant created shallow level trap states near the band edge of the lightly doped CsPbBr3 microcrystal, making the electron more stable in excited states for population inversion. The emission peak intensity of the Fe-doped microwire increased nonlinearly above a threshold under CW laser excitation, indicating significant light amplification. These findings highlight the potential of Fe-doped perovskite crystal microwires for low-cost, high-performance, room-temperature electrical pumping perovskite lasers.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Rodrigo F. da Silva, Daniel F. Luz, Celio V. T. Maciel, Emanuel P. Santos, Gabriela Soares, Jefferson F. da Silva, Lauro J. Q. Maia, Carlos Jacinto, Andre L. Moura
Summary: This study demonstrates a photon-avalanche-like process based on trivalent neodymium ions (Nd3+) using stoichiometric NdAl3(BO3)(4) particles under unconventional excitation. By phonon-assisted excitation and cross-relaxation, the absorption of Nd3+ ions at 1064 nm can be increased. The study also investigates the influence of Nd3+ content on this process.
Article
Physics, Applied
Jiri Dolezal, Pablo Merino, Martin Svec
Summary: The study introduces an optical method for determining the frequency-dependent magnitude of the transfer function of a high-frequency line integrated with a scanning probe microscope. By determining the energy cutoff of the plasmonic electroluminescence spectrum, the method is effective in linking to the energies of the electrons inelastically tunneling across the junction. The research demonstrates that the method shows good agreement with conventional fully electronic calibration in compensating for radio frequency line and determining the transfer function magnitude in the GHz range.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
A. N. Nechay, A. A. Perekalov, N. Chkhalo, N. N. Salashchenko, M. A. Korepanov, M. R. Koroleva
Summary: This study discusses the results of extreme ultraviolet emission spectra of targets based on shock waves induced by pulsed laser radiation. Utilizing a Nd:YAG laser for excitation, emission spectra of Ar, Kr, N-2, and CO2 were explored in the spectral range of 90-200 A, leading to the determination of emitting ions and conclusions on the applicability of these targets as sources of extreme ultraviolet radiation.
OPTICS AND LASER TECHNOLOGY
(2021)
Correction
Optics
Jessica E. Q. Bautista, Manoel L. da Silva-Neto, Cecilia L. A. V. Campos, Melissa Maldonado, Cid B. de Araujo, Anderson S. L. Gomes
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Physics, Applied
Ernesto P. Raposo, Anderson S. L. Gomes, Cid B. de Araujo
Summary: This article introduces the winners of the 2021 Physics Nobel Prize and their groundbreaking contributions to our understanding of complex physical systems, and comments on the research group's work on the complex system properties of random lasers and random fiber lasers.
MOMENTO-REVISTA DE FISICA
(2022)
Article
Optics
Luiz M. M. Barreto, Davinson M. da Silva, Antonio D. Santos, Koiti Araki, Cid B. de Araujo, Luciana R. P. Kassab
Summary: Multilayer graphene (MLG) thin films were produced by depositing them on a cobalt buffer-layer prepared at 500 degrees C and subsequently thermal annealing. The annealing process allowed the transformation of amorphous carbon to graphene through diffusion and nucleation. The thicknesses of the cobalt and MLG thin films were measured as 55 and 54 nm, respectively, by atomic force microscopy. Raman spectroscopy confirmed the presence of MLG based on the intensity ratio of the 2D and G bands (I2D/IG), which was found to be 0.4 for the annealed graphene thin film. Additional analysis using transmission electron microscopy supported the Raman results. Moreover, the MLG films exhibited significant nonlinear absorption behavior at 980 nm and can be utilized as optical limiters.
Article
Optics
Josivanir G. Camara, Davinson M. Da Silva, Luciana R. P. Kassab, Cid B. De Araujo
Summary: Random lasing is observed in neodymium doped alumina lead-germanate glass powder for the first time. The samples were fabricated using a conventional melt-quenching technique and confirmed to have an amorphous structure. Excitation of the sample at 808 nm resulted in random laser emission at 1060 nm, with an excitation energy fluence threshold of 0.3 mJ/mm2. The use of large quantities of neodymium oxide in the glass did not hinder the laser emission process, despite luminescence concentration quenching.
Article
Nanoscience & Nanotechnology
Jessica E. Q. . Bautista, Cecilia L. A. . V. Campos, Manoel L. da Silva-Neto, Cid B. de Araujo, Ali M. Jawaid, Robert Busch, Richard A. Vaia, Anderson S. L. Gomes
Summary: Experimental studies were conducted on spatial self-phase modulation (SSPM) in liquid suspensions of various materials using different light polarization and excitation lasers. The changes in refractive index and ring formation were explained as thermal effects. The measured thermal nonlinear coefficients were independent of the optical excitation regime. The use of circularly polarized light provided complementary results to linearly polarized light.
Article
Chemistry, Physical
Maxwell A. M. Nogueira, Albert S. Reyna, Helivaldo D. S. Souza, Bruno F. Lira, Petronio F. de Athayde-Filho, Cid B. B. de Araujo
Summary: We synthesized a mesoionic compound and investigated its nonlinear optical response in terms of refractive and absorptive properties in different temporal and spectral regimes. Z-scan technique was used with two pulsed light sources: a mode-locked and Q-switched Nd-YAG laser at 532 nm and a Ti: Sapphire laser system at 800 nm. The compound's nonlinear refraction, two- and three-photon absorption, and excited state absorption were observed and characterized based on a three-energy-level model, allowing the determination of the parameters that describe the nonlinear response.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Materials Science, Multidisciplinary
Luz Patricia Naranjo-Riano, Nathalia T. C. Oliveria, Camilo E. Echeverry, Luciana R. P. Kassab, Cid B. de Araujo
Summary: We synthesized and characterized PbO-Bi2O3-Ga2O3 glass-ceramics containing PbO and Bi2O3 crystallites, free Pb2+ and Bi3+ ions, and Ag-NPs. The samples were prepared using the melt-quenching method followed by heat treatment. Various techniques were used for characterization, including transmission electron microscopy, X-ray diffraction, linear optical absorption, and photoluminescence (PL). Excitation at 330 nm resulted in a large PL intensity due to Pb2+ and Bi3+. Additionally, the PL intensity was enhanced by about 1000% in samples containing Ag-NPs compared to those without Ag-NPs. This behavior is reported for the first time in heavy-metal oxide glass-ceramics, highlighting the potential for photonic applications.
Article
Optics
Andre C. A. Siqueira, Guillermo Palacios, Albert S. Reyna, Boris A. Malomed, Edilson L. Falcao-Filho, Cid B. de Araujo
Summary: We present the results of a numerical analysis comparing the efficiency of the multiple temporal compression (MTC) method with conventional methods using photonic crystal fibers (PCFs) and fused silica waveguides (FSWs) for generating multiple solitons. The analysis shows that the MTC method is more efficient in controlling soliton fission, resulting in a larger number of high-powered fundamental solitons that remain stable over long distances. The high efficiency of the MTC method is particularly evident in multiple soliton collisions and the Newton's-cradle phenomenology.
OPTICS COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Anderson S. L. Gomes, Cecilia L. A. V. Campos, Cid B. de Araujo, Melissa Maldonado, Manoel L. da Silva-Neto, Ali M. Jawaid, Robert Busch, Richard A. Vaia
Summary: In this article, we review our work on the nonlinear optical response of a series of 2D-LTMDs nanomaterials using six different NLO techniques. We studied the nonlinear response of various materials and measured the nonlinear refraction index and absorption coefficient. Theoretical support was also provided to explain the origin of the nonlinear responses.
Article
Optics
Guillermo Palacios, Andre C. A. Siqueira, Cid B. de Araujo, Anderson S. L. Gomes, Ernesto P. Raposo
Summary: In this study, the phenomenon of replica symmetry breaking (RSB) was investigated in random lasers (RLs) through Monte Carlo simulations. The study revealed that photonic random walkers diffuse and get randomly scattered in the active medium, interacting with both the population of excited atoms and each other. When the interactions among photonic walkers are not included, a replica-symmetric distribution for the Parisi overlap parameter (P(q)) at q = 0 is found for any excitation energy. The study also examined the statistical correlations of intensity fluctuations in different modes of the same spectrum, finding consistency with experimental results in RL materials.
Article
Nanoscience & Nanotechnology
Jessica E. Q. Bautista, Cecilia L. A. V. Campos, Manoel L. da Silva-Neto, Cid B. de Araujo, Ali M. Jawaid, Robert Busch, Richard A. Vaia, Anderson S. L. Gomes
Summary: We experimentally studied spatial self-phase modulation (SSPM) in liquid suspensions of various 2D materials. The intensity-dependent changes in refractive index responsible for SSPM are shown to be due to thermal effects. The measured thermal nonlinear coefficients for different suspensions are independent of the excitation regime. The use of circularly polarized light complements the results obtained with linearly polarized light.
Article
Chemistry, Physical
Manoel L. Silva-Neto, Renato Barbosa-Silva, Georges Boudebs, Cid B. de Araujo
Summary: This study determined the first hyperpolarizability of graphene quantum dots (GQDs) suspended in water using the hyper-Rayleigh scattering (HRS) technique. The results suggest that these GQDs may have potential applications in biological microscopy imaging.
Article
Materials Science, Multidisciplinary
Renato Barbosa-Silva, Mario S. S. Oliveira, Rudson C. Ferreira, Vinicius Manzoni, Eduardo H. L. Falcao, Cid B. de Araujo
Summary: Measurements and theoretical modeling of the second-order optical nonlinearity of two 1,3,4-oxadiazole derivatives, Oxa-4-Py and DiOxaBn-2-Tio, were reported. The dynamic and static first hyperpolarizability values were measured using the hyper-Rayleigh scattering technique and a density functional method. The results showed that the first hyperpolarizability of DiOxaBn-2-Tio is approximately 30% larger than that of Oxa-4-Py.
Article
Optics
Andre C. A. Siqueira, Edilson L. Falcao-Filho, Boris A. Malomed, Cid B. de Araujo
Summary: Theoretical consideration and numerical simulation of femtosecond pulse propagation in a one-dimensional composite medium reveals the generation of bright soliton trains. The paper discusses the controllable production of ultrashort temporal solitons and addresses the role of intrapulse Raman scattering and collisions between solitons with different central wavelengths.
Article
Optics
Kelly C. Jorge, Anderson M. Amaral, Albert S. Reyna, Leonardo de S. Menezes, Cid B. de Araujo
Summary: Optical phenomena such as nonlinear absorption and nonlinear refraction are often determined using light transmittance techniques. However, in turbid or resonant media, scattering can significantly attenuate the laser beam, leading to overestimated absorptive losses. In this study, the scattered-light imaging method was used to discriminate between the contributions of nonlinear absorption and nonlinear scattering in a turbid medium. The results obtained from both the transmittance technique and the scattered-light imaging method complement each other, allowing for a more comprehensive characterization of turbid media.
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.
