| author | Kwang Seob Jeong |
|---|---|
| journal | ACS Nano |
| Homepage | https://kwangsjeong.wixsite.com/ksjlab-koreauniv |
The infrared quantum plasmon resonance (IR QPR) of nanocrystals (NCs) exhibits the combined properties of classical and quantum mechanics, potentially enabling unprecedented optics. However, research on the development of localized surface plasmon resonance (LSPR) from colloidal quantum dots has stagnated, owing to the challenge of increasing the carrier density of semiconducting NCs. Herein, we present the mid-IR QPR of a self-doped Ag2Se NC with an exceptionally narrow bandwidth. Chemical modification of the NC surface with chloride realizes this narrow QPR bandwidth by achieving a high free-carrier density in the NC. The mid-IR QPR feature was thoroughly analyzed using various experimental methods, such as Fourier transform (FT) IR spectroscopy, X-ray photoelectron spectroscopy, and current-voltage measurements. In addition, the optical properties were theoretically analyzed using a plamon-in-a-box model and modified hydrodynamic model that revealed the effect of coupling with the intraband transition and the limited nature of electron density in semiconductor NCs. Integrating the quantum effect into the plasmonic resonance reduces the peak bandwidth to 19.7 meV, which is an extremely narrow bandwidth compared to that of the LSPR of conventional metal oxide or metal chalcogenide NCs. Our results demonstrate that self-doped silver selenide quantum dots are excellent systems for studying mid-IR QPR.
https://pubs.acs.org/doi/10.1021/acsnano.3c03911
Self-Aggregating Tau Fragments Recapitulate Pathologic Phenot...
Molecular Thermoelectricity in EGaIn-Based Molecular Junctions
-
Read More
Long-Range Charge Transport in Molecular Wires
Long-range charge transport (LRCT) in molecular wires is crucial for the advancement of molecular electronics but remains insufficiently understood due to complex transport mechanisms and their dependencies on molecular structure. While sho... -
Read More
Generative Deep Learning-Based Efficient Design of Organic Molecules with Tailored Properties
Innovative approaches to design molecules with tailored properties are required in various research areas. Deep learning methods can accelerate the discovery of new materials by leveraging molecular structure–property relationships. I... -
Read More
Ru2P/Ir2P Heterostructure Promotes Hydrogen Spillover for Efficient Alkaline Hydrogen Evolution Reaction
Efficient and durable electrocatalysts toward alkaline hydrogen evolution reaction (HER) are of great significance for the widespread application of anion-exchange membrane water electrolyzer (AEMWE). Numerous single-phase catalysts, such a... -
Read More
Spatiotemporal Nitric Oxide Modulation via Electrochemical Platform to Profile Tumor Cell Response
Nitric oxide (NO) is a gaseous molecule intricately implicated in oncologic processes, encompassing the modulation of angiogenesis and instigating apoptosis. Investigation of the antitumor effects of NO is currently underway, necessitating ... -
Read More
Lutetium Texaphyrin–Celecoxib Conjugate as a Potential Immuno-Photodynamic Therapy Agent
안주성 석박사통합과정 Immuno-photodynamic therapy (IPDT) has emerged as a new modality for cancer treatment. Novel photosensitizers can help achieve the promise inherent in IPDT, namely, the complete eradication of a tumor without recurrenc... -
Read More
High Hydrogen Storage in Trigonal Prismatic Monomer-Based Highly Porous Aromatic Frameworks
Hydrogen storage is crucial in the shift toward a carbon-neutral society, where hydrogen serves as a pivotal renewable energy source. Utilizing porous materials can provide an efficient hydrogen storage solution, reducing tank pressures to ... -
Read More
Boc Protection for Diamine-Appended MOF Adsorbents to Enhance CO2 Recyclability under Realistic Humid Conditions
Among the various metal–organic framework (MOF) adsorbents, diamine-functionalized Mg2(dobpdc) (dobpdc4– = 4,4-dioxidobiphenyl-3,3′-dicarboxylate) shows remarkable carbon dioxide removal performance. However, applying diam... -
Read More
Double-Walled Tubular Heusler-Type Platinum–Ruthenium Phosphide as All-pH Hydrogen Evolution Reaction Catalyst Outperforming Platinum and Ruthenium
Nanostructured ionic compounds have driven major technological advancements in displays, photovoltaics, and catalysis. Current research focuses on refining the chemical composition of such compounds. In this study, a strategy for creating s... -
Read More
Seebeck Effect in Molecular Wires Facilitating Long-Range Transport
The study of molecular wires facilitating long-range charge transport is of fundamental interest for the development of various technologies in (bio)organic and molecular electronics. Defining the nature of long-range charge transport is ch... -
Read More
Early onset diagnosis in Alzheimer’s disease patients via amyloid-β oligomers-sensing probe in cerebrospinal fluid
Amyloid-β (Aβ) oligomers are implicated in the onset of Alzheimer’s disease (AD). Herein, quinoline-derived half-curcumin-dioxaborine (Q-OB) fluorescent probe was designed for detecting Aβ oligomers by finely tailoring ... -
Read More
Thermopower in Underpotential Deposition-Based Molecular Junctions
Underpotential deposition (UPD) is an intriguing means for tailoring the interfacial electronic structure of an adsorbate at a substrate. Here we investigate the impact of UPD on thermoelectricity occurring in molecular tunnel junctions bas... -
Read More
Eco-friendly solution-processed narrowband OLEDs using non-halogenated aliphatic solvent systems
In general, fabricating multilayer structures in solution-processed organic light-emitting diodes (OLEDs) presents challenges owing to the potential degradation of the initial film during subsequent processing steps. Furthermore, these devi... -
Read More
Self-Aggregating Tau Fragments Recapitulate Pathologic Phenotypes and Neurotoxicity of Alzheimer's Disease in Mice
In tauopathy conditions, such as Alzheimer's disease (AD), highly soluble and natively unfolded tau polymerizes into an insoluble filament; however, the mechanistic details of this process remain unclear. In the brains of AD patients, o... -
Read More
Ultranarrow Mid-infrared Quantum Plasmon Resonance of Self-doped Silver Selenide Nanocrystal
The infrared quantum plasmon resonance (IR QPR) of nanocrystals (NCs) exhibits the combined properties of classical and quantum mechanics, potentially enabling unprecedented optics. However, research on the development of localized surface ... -
Read More
Molecular Thermoelectricity in EGaIn-Based Molecular Junctions
Understanding the thermoelectric effects that convert energy between heat and electricity on a molecular scale is of great interest to the nanoscience community. As electronic devices continue to be miniaturized to nanometer scales, thermor... -
Read More
Perovskite Nanocrystals Protected by Hermetically Sealing for Highly Bright and Stable Deep-Blue Light-Emitting Diodes
Metal–halide perovskite nanocrystals (NCs) have emerged as suitablelight-emitting materials for light-emitting diodes (LEDs) and other practicalapplications. However, LEDs with perovskite NCs undergoenvironment-induced and ion-migratio... -
Read More
The importance of a charge transfer descriptor for screening potential CO2 reduction electrocatalysts
It has been over twenty years since the linear scaling of reaction intermediate adsorption energies started to coin the fields of heterogeneous and electrocatalysis as a blessing and a curse at the same time. It has established the possibili... -
Read More
Resonant Raman-Active Polymer Dot Barcodes for Multiplex Cell Mapping
Resonance Raman spectroscopy is an efficient tool for multiplex imaging because of the narrow bandwidth of the electronically enhanced vibrational signals. However, Raman signals are often overwhelmed by concurrent fluorescence. In this stud... -
Read More
Decoding the Roles of Amyloid-β (1-42)'s Key Oligomerization Domains toward Designing Epitope-Specific Aggregation Inhibitors
Fibrillar amyloid aggregates are the pathological hallmarks of multiple neurodegenerative diseases. The amyloid-β (1-42) protein, in particular, is a major component of senile plaques in the brains of patients with Alzheimer’s di... -
Read More
Flattening bent Janus nanodiscs expands lattice parameters
Nanoscale lattice parameter engineering is a potentially powerful tool for tailoring the electronic properties of nanomaterials. The nascent strain in juxtaposed hetero-interfaces of nanocrystals was recently shown to substantially affect t...