Article
Chemistry, Multidisciplinary
Fei Wang, Zexiang Han, Juehan Sun, Xuekang Yang, Xiaoli Wang, Zhiyong Tang
Summary: This study provides a comprehensive analysis of the ultrafast chiroptical response of chiral gold nano-oligomers using time-resolved polarimetric measurements. The results reveal significant differences in absorption intensity and hot carrier decay time upon polarized photopumping, which can be explained by a phenomenological model of helicity-resolved optical transitions. Additionally, the chiroptical signal can be switched by reversing the direction of the pump pulse, demonstrating versatile modulation of polarization selection in a single device.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Guili Li, Xiaoxian Zhang, Yongsheng Wang, Zhiying Bai, Hui Zhao, Jiaqi He, Dawei He
Summary: This study investigates the photocarrier dynamics in PdSe2 and reveals a photocarrier lifetime of around 210 ps, a diffusion coefficient of about 7.3 cm(2) s(-1), a diffusion length of approximately 400 nm, and a photocarrier mobility of around 300 cm(2) V-1 s(-1). These findings are crucial for understanding the ultrafast optoelectronic properties of PdSe2 and for designing high-performance optoelectronic devices based on this material.
Article
Chemistry, Multidisciplinary
Guili Li, Xiaoxian Zhang, Yongsheng Wang, Zhiying Bai, Hui Zhao, Jiaqi He, Dawei He
Summary: We investigated the behavior of photocarriers in bulk PdSe2 flakes using femtosecond transient absorption microscopy. Our findings show that the lifetime of photocarriers in bulk PdSe2 is approximately 210 ps, and the photocarrier diffusion coefficient is about 7.3 cm(2) s(-1). Based on these results, we estimate a diffusion length of around 400 nm and a photocarrier mobility of approximately 300 cm(2) V-1 s(-1). These results provide insights into the optoelectronic properties of PdSe2 and enable the design of high-performance optoelectronic devices.
Article
Chemistry, Physical
Pieter Schiettecatte, Zeger Hens, Pieter Geiregat
Summary: Atomically thin two-dimensional (2D) semiconductors are important for optoelectronic applications, but the nonlinear optical response is masked by congested spectral information. In this paper, a roadmap for analyzing congested datasets of various 2D materials using transient absorption (TA) is outlined, emphasizing the synergy between qualitative understanding of the transient photo-response and quantitative spectral deconvolution.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Chang Zhao, Weijian Tao, Zeng Chen, Hongzhi Zhou, Chi Zhang, Junyi Lin, Haiming Zhu
Summary: This study demonstrates that exciton dissociation can effectively suppress the electron-hole interaction in TMDs, thereby prolonging the charge/spin/valley lifetime.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Matz Liebel, Franco V. A. Camargo, Giulio Cerullo, Niek F. van Hulst
Summary: Scientists have successfully addressed the challenge in the field of nanoscale imaging by combining concepts of ultrafast spectroscopy, wide-field nanoscopy, and digital holography. They have introduced an ultrafast holographic transient microscope for wide-field transient nanoscale imaging and demonstrated time-resolved spectroscopy of gold nanoparticles.
Article
Chemistry, Physical
Isabel Gonzalvez Perez, William Barford
Summary: This study investigates the intrachain exciton dynamics in poly(para-phenylenevinylene) through large-scale simulations. The entanglement between excitons and C-C bond phonons causes exciton-site decoherence after photoexcitation, while torsional relaxation further leads to exciton-density localization.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Nanoscience & Nanotechnology
Buyang Yu, Chunfeng Zhang, Lan Chen, Zhengyuan Qin, Xinyu Huang, Xiaoyong Wang, Min Xiao
Summary: Perovskite semiconductor nanocrystals have shown promise in optoelectronic applications, with recent research focusing on their photoinduced carrier dynamics. The dynamics of carrier generation, recombination, and transport play essential roles in the performance of devices such as light-emitting diodes and solar cells. Spin dynamics and coherent exciton dynamics are important for potential applications in quantum information technology, though there are still controversial results and unresolved origins to be addressed.
Review
Nanoscience & Nanotechnology
Buyang Yu, Chunfeng Zhang, Lan Chen, Zhengyuan Qin, Xinyu Huang, Xiaoyong Wang, Min Xiao
Summary: Perovskite semiconductor nanocrystals have shown great potential in optoelectronic applications, and their performances rely on the excited-state dynamics, with recent studies focusing on photoinduced carrier dynamics, spin dynamics, and coherent exciton dynamics. Future research should aim to address controversial results and unresolved origins to fully understand the excited-state dynamics.
Article
Multidisciplinary Sciences
Satyendra Nath Gupta, Ora Bitton, Tomas Neuman, Ruben Esteban, Lev Chuntonov, Javier Aizpurua, Gilad Haran
Summary: Plasmonic cavities can confine electromagnetic radiation to deep sub-wavelength regimes, allowing for strong coupling phenomena with individual quantum emitters. By studying scattering spectra and using interferometry, researchers observed Rabi splitting and non-classical emission in devices with semiconductor quantum dots, revealing complex interactions between bright and dark states. Model simulations based on an extended Jaynes-Cummings Hamiltonian explained the experimental findings, highlighting the potential of controlling quantum state dynamics through the coupling of quantum emitters to plasmonic cavities.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Xuyang Fan, An Wei, Tillmann Klamroth, Yuan Zhang, Kun Gao, Luxia Wang
Summary: In this study, we simulate the exciton-exciton annihilation (EEA) process in dye molecular aggregates with laser pulse excitation using reduced density matrix theory. We highlight the importance of quantum coherence effects and discuss the factors affecting the EEA process. Our results suggest that coherent excitation at the lowest energy level in J aggregates enhances the efficiency of the EEA process.
Article
Chemistry, Physical
Andrea Schirato, Luca Moretti, Zhijie Yang, Andrea Mazzanti, Giulio Cerullo, Marie-Paule Pileni, Margherita Maiuri, Giuseppe Della Valle
Summary: This study reports on the dynamics of photothermal conversion and the related nonlinear optical response from water-soluble nanoeggs. By controlling the size of the gold suprastructure core, the photothermal properties of the nanoeggs can be designed and tailored, resulting in superior performances compared to conventional nanoheaters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yuzhong Chen, Ying Shi, Yusong Gan, Haiyun Liu, Tengfei Li, Sanjib Ghosh, Qihua Xiong
Summary: Exciton polaritons at room temperature exhibit ultrafast coherent dynamics with high propagation speed and longer coherence time than previously believed.
Article
Chemistry, Multidisciplinary
Bhuvan Upadhyay, Rahul Sharma, Dipak Maity, Tharangattu N. Narayan, Suman Kalyan Pal
Summary: Substitutional doping is an effective method to manipulate the properties of two-dimensional transition metal dichalcogenides (TMDCs), but its effects on the dynamics of charge carriers and optoelectronic properties are not well understood. This study reveals that vanadium doping introduces additional energy states in the doped material, leading to new features in the transient absorption spectra. The doping also affects the quasiparticle band structure and carrier lifetime of MoS2.
Article
Optics
Shuang Chen, Ruipeng Niu, Yachen Gao, Wenfa Zhou, Kun Liu, Yuxiao Wang, Yinglin Song, Xueru Zhang
Summary: The process and condition of saturable absorption (SA) and reverse saturable absorption (RSA) in metal nanoparticles play a crucial role in applications such as light generation, amplification, modulation, and switching. This study discovers and explores the multiple transformations of ultrafast nonlinear absorption behavior in metal nanoparticles and establishes an energy level model and fitting formula to illustrate the optical response process. The results indicate that gold nanobipyramids (Au-NBPs) exhibit a significantly higher SA modulation depth and offer new opportunities for optical switching applications.
Article
Chemistry, Physical
Elif Akhuseyin Yildiz, Ebru Yabas, Fazli Sozmen, Yasemin Bozkurt, Ahmet Karatay, Bahadir Boyacioglu, Huseyin Unver, Ayhan Elmali
Summary: In this study, the photophysical properties of BODIPY compounds were investigated. It was found that the presence of iodine atoms caused a significant red-shift in the absorption band and quenched the fluorescence signals. The introduction of biphenyl rings did not affect the spectral shifting. Femtosecond transient absorption spectroscopy measurements revealed that BODIPY compounds with iodine atoms exhibited intersystem crossing, with ISC rates of 150 ps and 180 ps for compounds with and without pi-expanded biphenyl rings, respectively. The charge transfer in the investigated compounds mostly appeared as intrinsic local excitations, indicating high photoluminescence efficiency. These experimental findings have important implications for the design and study of organic triplet photosensitizers.
Article
Optics
Yasemin Pepe, Mehmet Isik, Ahmet Karatay, Nizami Gasanly, Ayhan Elmali
Summary: This study reports the influence of excitation wavelength and input intensity on the nonlinear absorption mechanism and optical limiting behavior of the Bi12TiO20 (BTO) single crystal. The results show that the BTO single crystal has nonlinear absorption ability and the absorption coefficient varies with the excitation wavelength and input intensity.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Sebile Isik Buyukeksi, Efe Baturhan Orman, Ahmet Karatay, Nursel Acar Selcuki, Ali Riza Ozkaya, Ayhan Elmali, Bekir Salih, Abdurrahman Sengul
Summary: A new zinc(II)-phthalocyanine compound with hydroxyl groups at the peripheral positions has been synthesized and characterized. The effects of the hydroxyl substituents on the optical and electrochemical properties of the compound were investigated. The compound demonstrated good nonlinear absorption and optical limiting behaviors in tetrahydrofuran. The study provides insight into the potential application of the compound in low-power optical limiting.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Rakesh Dhama, Mohsin Habib, Alireza R. Rashed, Humeyra Caglayan
Summary: Conventional plasmonic nanoantennas cannot fully exploit their scattering and absorption features simultaneously due to their overlap in the same wavelength region. However, hyperbolic meta-antennas (HMA) with spectrally separated scattering and absorption bands enable enhanced hot-electron generation and prolonged relaxation dynamics of hot carriers. By extending the plasmon-modulated photoluminescence spectrum towards longer wavelengths and controlling the tunable absorption band, HMA offers improved excitation efficiency and broader utilization of visible/NIR spectrum compared to nanodisk antennas (NDA). Therefore, rational heterostructures designed with plasmonic and adsorbate/dielectric layers in such dynamics can optimize and engineer the utilization of plasmon-induced hot carriers.
Article
Materials Science, Multidisciplinary
Anil Dogan, Ahmet Karatay, Mehmet Isik, Yasemin Pepe, Nizami Gasanly, Ayhan Elmali
Summary: Nonlinear absorption mechanisms, excitation wavelength dependence, and defect states of Bi12SiO20 (BSO) single crystal were investigated. The NA behavior decreased with increasing pump intensity as the defect states at around 2.32 eV by one photon absorption (OPA) at 532 nm and two photon absorption (TPA) at 1064 nm excitations. The dominant NA mechanisms are OPA and sequential TPA at 532 nm as compared to the 1064 nm. A higher NA coefficient was obtained at 532 nm as compared to 1064 nm excitation, attributed to higher contribution of OPA at 532 nm even at lower input intensities compared to TPA contribution at 1064 nm. Onset optical limiting thresholds were found as 0.34 and 0.68 mJ/cm2 for 532 and 1064 nm input beams, respectively. The BSO single crystal may be used as a saturable absorber or an optical limiter at convenient input intensity by effectively adjusting defect states and excitation wavelength.
Article
Physics, Multidisciplinary
Yasemin Pepe, Elif Akhuseyin Yildiz, Mehmet Isik, Ahmet Karatay, Nizami Gasanly, Ayhan Elmali
Summary: The compositional effect of Mo/W ratio on linear, nonlinear absorption and optical limiting behavior of NaBi(MoxW1-xO4)(2) single crystals was investigated. The crystal structure, nonlinear absorption parameters, and optical limiting properties were determined. The results showed that the Mo/W ratio can tune the defect states and significantly affect the nonlinear absorption and optical limiting behaviors, making these single crystals suitable for optoelectronic applications.
Article
Chemistry, Multidisciplinary
Xi Chen, Noreen Rehmat, Ivan V. Kurganskii, Partha Maity, Ayhan Elmali, Jianzhang Zhao, Ahmet Karatay, Omar F. Mohammed, Matvey V. Fedin
Summary: Bodipy (BDP)-perylenebisimide (PBI) donor-acceptor dyads/triad were synthesized to investigate the spin-orbit charge-transfer intersystem crossing (SOCT-ISC). Different quantum yields of singlet oxygen were observed for the dyads/triad, and various processes including FRET, CS, CR, and TTET were observed in the excited state dynamics. Time-resolved electron paramagnetic resonance spectroscopy revealed the involvement of both radical pair ISC and SOCT-ISC in the intersystem crossing. The triad BDP-PBI-2 showed an unusual electron spin polarization pattern of (e, e, e, e, e, e) in the triplet state formed via the RP ISC mechanism.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Elif Akhuseyin Yildiz, Yasemin Pepe, Digdem Erdener, Ahmet Karatay, Bahadir Boyacioglu, Huseyin Unver, Gonul Yapar, Neslihan Demir, Mustafa Yildiz, Ayhan Elmali
Summary: In this study, 2-formylbenzenesulfonic acid sodium salt-based Schiff bases were synthesized and their structures were determined by various spectroscopy methods. The compounds were found to have anion sensing properties and were also investigated for their antimicrobial activities, interactions with DNA, DNA cleavage, and antioxidant activities. Furthermore, the effects of group electronegativity on the spectroscopic, biological, chromogenic sensing, and optical properties of the compounds were studied.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Optics
Yasemin Pepe, Serife Akkoyun, Bedirhan Bozkurt, Ahmet Karatay, Aytunc Ates, Ayhan Elmali
Summary: This study investigated the wavelength dependent nonlinear absorption mechanisms, nonlinear absorption and optical limiting behaviors of electrospun polyvinylpyrrolidone/cadmium selenide (PVP/CdSe) hybrid nanofibers. It was found that all hybrid nanofibers exhibited nonlinear absorption properties at both 1064 and 532 nm excitation wavelengths, with the highest CdSe filler content showing the strongest nonlinear absorption at 1064 nm.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Elif Akhuseyin Yildiz, Yasemin Pepe, Digdem Erdener, Ahmet Karatay, Bahadir Boyacioglu, Hueseyin Unver, Gonul Yapar, Neslihan Demir, Mustafa Yildiz, Ayhan Elmali
Summary: In this study, imine compounds based on 3-amino-4-hydroxybenzenesulfonic acid were synthesized and analyzed. These compounds showed potential as chemosensors and interacted with DNA. The optical properties of these compounds were influenced by substituents, and they exhibited high antioxidant activity.
Article
Nanoscience & Nanotechnology
Michael Lobet, Nathaniel Kinsey, Inigo Liberal, Humeyra Caglayan, Paloma A. Huidobro, Emanuele Galiffi, Jorge Ricardo Mejia-Salazar, Giovanna Palermo, Zubin Jacob, Nicolo Maccaferri
Summary: This Perspective provides an overview of the state of the art and challenges in emerging research areas where near-zero refractive index and hyperbolic metamaterials are pivotal, including light and thermal emission, nonlinear optics, sensing applications, and time-varying photonics.
Article
Chemistry, Multidisciplinary
Elif Akhuseyin Yildiz, Bekir Asilcan Unlu, Ahmet Karatay, Yasemin Bozkurt, Muhammed Emre Ozler, Fazli Sozmen, Ebru Yabas, Bahadir Boyacioglu, Huseyin Unver, Ayhan Elmali
Summary: In this study, BODIPY dyes substituted by phenol or -COOMe units at the meso-position were synthesized and their photophysical properties were analyzed. It was observed that the introduction of a methoxy moiety at the -C3 and -C5 positions of BODIPY caused a red shift in absorption maxima. Additionally, attaching a -COOMe unit at the meso-position increased nonradiative molecular relaxation compared to compounds with phenol substituents. The effect of phenol and -COOMe groups and extended π-conjugation with a methoxy moiety on two-photon absorption and electron transfer dynamics was investigated using open-aperture (OA) Z-scan and femtosecond transient absorption spectroscopy measurements.
Article
Nanoscience & Nanotechnology
Ipek Anil Atalay Appak, Erdem Sahin, Christine Guillemot, Humeyra Caglayan
Summary: Conventional microscopy systems have limited depth of field. To address this challenge, a computational extended depth of field (EDOF) microscope combining learned optics and a deblurring neural network is proposed. A systematic design methodology based on the specific sample visualization requirements is presented, showing that metasurface optics provides superior EDOF performance.
Article
Chemistry, Multidisciplinary
Bekir Asilcan Unlu, Serife Akkoyun, Ahmet Karatay, Aytunc Ates, Ayhan Elmali
Summary: This study investigated the effect of aluminum (Al) concentration on the surface plasmon resonance (SPR) band position of aluminum/polyvinylpyrrolidone (Al/PVP) composite nanofibers and found that increasing Al content can enhance nonlinear absorption (NLA) effects. Experimental and theoretical analysis showed that the first model provided more accurate results. It was observed that the NLA performance of Al/PVP nanofibers significantly improved with increasing Al content, accompanied by aggregation effects and broadening and red shifting of the SPR band, indicating a decreasing interparticle distance in Al particles.
Article
Chemistry, Physical
Elif Akhuseyin Yildiz, Yasemin Pepe, Digdem Erdener, Ahmet Karatay, Bahadir Boyacioglu, Hueseyin Unver, Gonul Yapari, Neslihan Demir, Mustafa Yildiz, Ayhan Elmali
Summary: In this study, a new series of Schiff base benzothiazole derivatives were synthesized and their chemical properties, biological activities and sensing capabilities were investigated. The compounds exhibited excellent fluorescence, chromogenic and spectroscopic sensing properties towards various anions. Moreover, they showed binding, cleavage and antioxidant activity towards DNA.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
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.
