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A Broadband Multiplex Living Solar Cell
摘要： Developing renewable and sustainable energy sources is a compelling goal in materials science and engineering. In particular, natural photosynthesis with its infinite energy reservoir provides profound inspiration for energy conversion and storage systems. Here, we report a multiplex living solar cell that offers a drastic power enhancement by harnessing the broadband spectra of the visible wavelength range for photosynthesis. Cyanobacteria are embedded into a nanostructural complex composed of Au nanoparticles (NPs) and ZnO nanorods (NRs). This nanocomposite system is capable of not only generating excitons but also amplifying the photosynthetic performance of in the broadband region of the light, resulting in multiplex energy harvesting with a peak power density of 6.15 mW/m2. We envision that this study will provide a strategic way to enhance the performance of biophotovoltaics, enabling efficient and durable energy generation.
关键词： Synechocystis sp. PCC 6803,Biophotovoltaics,hybrid nanostructure,localized surface plasmon resonance
更新于2025-09-23 15:21:01
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Strategies to Achieve High Performance Piezoelectric Nanogenerators
摘要： Piezoelectric nanogenerators have attracted much attention in the past decade. In this study, the development of piezoelectric nanogenerators and their progress toward high power generation is discussed. The characteristics and application range of numerous types of piezoelectric nanogenerators are also considered. In addition, several strategies that may improve the performance of piezoelectric nanogenerators are summarized. Here, we compare the open circuit voltages and short circuit currents of various piezoelectric nanogenerators under different factors, and the current problems of piezoelectric nanogenerators are also discussed. Finally, the future prospects and directions of piezoelectric nanogenerators are predicted. Future studies should be focused on the production of high-performance materials, the establishment of working principle and simulation model, the integration of nanogenerator, and the design of the energy harvesting circuit. Hence, it is emergency to search for functional materials with high piezoelectricity and further improve the electromechanical properties of existing piezoelectric materials. Moreover, further research is needed to increase the stability and flexibility of composite materials, to develop wearable and embedded flexible functional devices based on the biocompatibility of inorganic nanoparticles, and to supply power for microelectronic systems.
关键词： BaTiO3,Piezoelectric nanogenerators,Composite thin film materials,PVDF,Chemical doping,Nanostructure
更新于2025-09-23 15:21:01
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Nanocatalosomes as Plasmonic Bilayer Shells with Interlayer Catalytic Nanospaces for Solara??Lighta??Induced Reactions
摘要： Paramount interest and challenges remain in designing and synthesizing catalysts with nature-like complexities at few-nm scale to harness unprecedented functionalities by using sustainable solar light. We introduce “nanocatalosomes”— bio-inspired bilayer-vesicular design of nanoreactor with metallic bilayer hollow shell-in-shell structure, having numerous controllable confined cavities within few-nm interlayer space, customizable with different noble metals. The intershell-confined plasmonically-coupled hot-nanospaces within the few-nm cavities play pivotal role in harnessing synergistic catalytic effects for various transformations, as demonstrated by ‘acceptorless dehydrogenation’, ‘Suzuki-Miayura cross-coupling’ and ‘alkynyl-annulation’ affording clean conversions and TOF at least one order of magnitude higher than state-of-the-art Au-nanorod-based plasmonic-catalysts. This work paves the way towards next-generation nanoreactors, craftable at few-nm scale to maximize their functionality and customizable to carry out diverse chemical transformations efficiently with green solar energy.
关键词： hollow nanostructure,nanocatalyst,bilayer structure,plasmonic-catalytic material,nano-space confinement
更新于2025-09-23 15:21:01
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Nanocatalosomes as Plasmonic Bilayer Shells with Interlayer Catalytic Nanospaces for Solara??Lighta??Induced Reactions
摘要： Paramount interest and challenges remain in designing and synthesizing catalysts with nature-like complexities at few-nm scale to harness unprecedented functionalities by using sustainable solar light. We introduce “nanocatalosomes”— bio-inspired bilayer-vesicular design of nanoreactor with metallic bilayer hollow shell-in-shell structure, having numerous controllable confined cavities within few-nm interlayer space, customizable with different noble metals. The intershell-confined plasmonically-coupled hot-nanospaces within the few-nm cavities play pivotal role in harnessing synergistic catalytic effects for various transformations, as demonstrated by ‘acceptorless dehydrogenation’, ‘Suzuki-Miayura cross-coupling’ and ‘alkynyl-annulation’ affording clean conversions and TOF at least one order of magnitude higher than state-of-the-art Au-nanorod-based plasmonic-catalysts. This work paves the way towards next-generation nanoreactors, craftable at few-nm scale to maximize their functionality and customizable to carry out diverse chemical transformations efficiently with green solar energy.
关键词： hollow nanostructure,nanocatalyst,bilayer structure,plasmonic-catalytic material,nano-space confinement
更新于2025-09-23 15:21:01
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Synthesis of Sphere-Like Silver Nanostructures Composed of Self-Assembled Nanosheets
摘要： Sphere-like silver nanostructures composed of self-assembled nanosheets were rapidly synthesized through adding ferrous sulfate into the mixture of silver nitrate and citric acid aqueous solution by magnetic stirring at room temperature for 20 min. The effects of the concentrations of the ferrous sulfate and citric acid on the morphology of the silver nanostructures were investigated in detail. The characterization of the sphere-like silver nanostructures composed of self-assembled nanosheets have been discussed by scanning electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and differential scanning calorimetry. Furthermore, the possible formation mechanism of sphere-like silver nanostructures composed of self-assembled nanosheets was explored. The experimental results show that the high concentration of citric acid and the low concentration of ferric sulfate are better for obtaining the sphere-like silver nanostructures composed of self-assembled nanosheets due to a low diffusion rate of silver atoms to the silver nucleus and a low growth rate of silver ?akes along the {111} facets. Such sphere-like silver nanostructures exhibit a strong surface-enhanced Raman scattering effect associated with their geometries, which is much stronger than that from nanosheets.
关键词： nanosheet,self-assembled,Sphere-like silver nanostructure,surface-enhanced Raman scattering effect
更新于2025-09-23 15:21:01
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Facile synthesis of Cr doped hierarchical ZnO nano-structures for enhanced photovoltaic performance
摘要： Transition metal doped ZnO has been widely used in various research areas such as optoelectronics, chemical sensors, solar cells and photo catalysts. Herein, we fabricated Cr-doped ZnO nanospheres by a facile solvothermal treatment for enhanced photovoltaic performance. A systematic study of the structural and optical properties of Cr doped ZnO were investigated by scanning electron microscopy (SEM), X-ray diffraction technique (XRD), Ultra violet-Visible spectroscopy (UV–Vis) respectively. XRD patterns confirm that the samples have hexagonal (wurtzite) structure with no additional peaks, which suggests that Cr ions replaces the regular Zn sites in the ZnO crystal structure. Furthermore, doped ZnO nanospheres were employed in the hybrid solar cells in combination with P3HT and gave better current densities than their corresponding undoped counterparts. The increase in solar cell efficiency of doped ZnO nanospheres is solely due to the improvement in the charge separation efficiency in the 4% Cr doped ZnO nanospheres. Optoelectronic analysis of the Cr doped ZnO hybrid solar cell showed comparable results of JSC ?3.7 (mAcm?2), VOC 0.44 (V), Fill Factor 0.49 and Efficiency (?) 0.79 (%). The enhanced photovoltaic activity of the Cr doped hierarchical ZnO nanostructures provides an interesting grounds for the design and enhancement of the low cost, feasible synthesis of photovoltaic nanostructure materials.
关键词： Hybrid solar cell,Solvothermal method,Optical absorption,Photovoltaic device,Nanostructure
更新于2025-09-23 15:21:01
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Plasmonic Manipulation-Controlled Chiral Crystallization of Sodium Chlorate
摘要： Plasmonic manipulation using well-designed triangular trimeric gold nanostructures achieves giant crystal enantiomeric excess (CEE), more than 50%, of sodium chlorate (NaClO3). Stronger asymmetric interaction between molecule and light are pursued to reach high enantiomeric excess. The well-designed gold nanostructures immersed in a saturated NaClO3 D2O solution was irradiated with linear, left-hand, and right-hand circular polarizations of a 1064 nm continuous-wave laser. Within seconds of the start of the irradiation, an achiral metastable crystal was formed at the laser focus, and further irradiation induced a subsequent polymorphic transition to the chiral crystal. The crystal chirality is sensitive to the using handedness circular polarization, allowing for efficient enantioselectivity. The mechanisms to achieve this giant CEE are proposed based on the results of electromagnetic field analysis generated near the nanostructure by the Finite Element Method.
关键词： Plasmonic trapping,Crystal chirality,Crystal enantiomeric excess,Angular momentum,Gold nanostructure
更新于2025-09-23 15:21:01
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Optical limiting properties of hybrid nickel naphthalocyanine-titania nanoparticals thin films
摘要： In this work, an ultrathin nanocomposite films containing tetracarboxylic Nickel (Ⅱ) naphthalocyanine (NiNc) and titania nanoparticles are fabricated through electrostatic self-assembled layer-by-layer (LBL) technique. UV–Vis spectroscopy, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) are utilized to characterize the film. The optical limiting properties of the composite films are investigated through intensity-dependent transmittance measurements at 600 nm with 18 ps laser pulses. The results show that the composite films have notable optical limiting response (β ～ 5.4 × 10?7 m/W), which is strongly enhanced compared to both TiO2 and NiNc-only samples. Our results suggest that the nanocomposite films possess the potential for optical limiting applications in the phototherapeutic window.
关键词： Optical limiting,Naphthalocyanine,Nanostructure,Self-assembly
更新于2025-09-23 15:21:01
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Silver modified cadmium oxide - A novel material for enhanced photodegradation of malachite green
摘要： An enhancement of Cadmium oxide (CdO) based catalyst activity was observed on modification with silver (Ag) by hydrothermal route in a short time and at low temperature. The products were characterized by XRD, Infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). XRD confirming the formation of CdO showed an intense diffraction peak at 32.73° with lattice plane (111). The IR spectrum shows characteristic peaks at 607, 1387 cm-1 corresponding to Cd-O bonds. Both CdO and Ag modified CdO (Ag-CdO) showed band gaps of 2.76 eV and 2.56 eV respectively stretching into the red portion of the solar spectrum. On irradiation with Ultraviolet (Uv) light CdO-Ag showed 78.02 % degradation of malachite green oxalate (MG), a hazardous dye within 175 minutes in comparison to native CdO (75.85 % in 175 minutes). Photoluminescence (PL) studies demonstrated better emission intensity quenching in case of Ag-CdO which is particularly promising for photocatalytic applications.
关键词： catalytic activity,semiconductor,luminescence,nanostructure
更新于2025-09-23 15:21:01
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Reconfigurable Plasmonic Nanostructures Controlled by DNA Origami
摘要： Precise surface functionalization and reconfigurable capability of nanomaterials are essential to construct complex nanostructures with specific functions. Here we show the assembly of a reconfigurable plasmonic nanostructure, which executes both conformational and plasmonic changes in response to DNA strands. In this work, different sized gold nanoparticles(AuNPs) were arranged site-specifically on the surface of a DNA origami clamp nanostructure. The opening and closing of the DNA origami clamp could be precisely controlled by a series of strand displacement reactions. Therefore, the patterns of these AuNPs could be switched between two different configurations. The observed plasmon band shift indicates the change of the plasmonic interactions among the assembled AuNPs. Our study achieves the construction of reconfigurable nanomaterials with tunable plasmon ic interactions, and will enrich the toolbox of DNA-based functional nanomachinery.
关键词： DNA origami,Reconfigurable nanostructure,Gold nanoparticle,Plasmonic nanostructure
更新于2025-09-23 15:19:57