Related Experiment Video
Updated: Sep 11, 2025
05:28
Versatile Technique to Produce a Hierarchical Design in Nanoporous Gold
Published on: February 10, 2023
1.8K
Reconfiguring Charge Spatial Distribution in One-Dimensional AuAg Alloy Nanoarrays
Qianhong Zhu1,2, Jianfeng Zhao1, Yuying Gao1
1State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China.
The Journal of Physical Chemistry Letters
|August 12, 2025
Summary
Engineered 1D-surface lattice resonance (1D-SLR) in plasmonic nanoarrays enhances solar water splitting by improving light absorption and charge separation. This approach significantly boosts photocatalytic efficiency for clean energy production.
Area of Science:
- Materials Science
- Nanotechnology
- Photocatalysis
Background:
- Plasmonic metal/semiconductor heterostructures utilize surface plasmon resonance (SPR) for solar photocatalysis.
- Conventional SPR confines optical fields, limiting hot carrier separation and charge utilization.
Purpose of the Study:
- To enhance solar-driven photocatalysis by engineering one-dimensional surface lattice resonance (1D-SLR).
- To improve light harvesting and interfacial charge dynamics for efficient solar energy conversion.
Main Methods:
- Finite element method (FEM) simulations of ordered AuAg nanoarrays on SrTiO3 substrates.
- Single-particle surface photovoltage (SPV) microscopy to analyze carrier distribution.
- Coupling nanoarrays with a Cobalt Oxide (CoO_x) cocatalyst for photoelectrochemical water oxidation.
Main Results:
- 1D-SLRs enhance hot electron generation and promote spatially extended photogenerated hole distribution.
- Demonstrated a 23-fold increase in incident photon-to-current efficiency (IPCE) for water oxidation.
- SLR engineering offers a new paradigm for optimizing light harvesting and charge dynamics.
Conclusions:
- 1D-SLR in plasmonic nanoarrays is a promising strategy for advanced solar photocatalysis.
- This approach overcomes limitations of conventional SPR by improving charge separation and utilization.
- SLR engineering provides a pathway for efficient solar energy conversion technologies.
Related Concept Videos
01:17Continuous Charge Distributions
7.2K
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
The electric charge can also be subjected to an analogical...
7.2K
02:54Trends in Lattice Energy: Ion Size and Charge
24.2K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
24.2K
03:08Atomic Radii and Effective Nuclear Charge
52.6K
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
52.6K
01:17Ampere-Maxwell's Law: Problem-Solving
751
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
751
01:21Energy Associated With a Charge Distribution
1.6K
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
1.6K
01:15Charging Conductors By Induction
8.2K
The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
8.2K