Korea Research Institute of Standards and Science

Modular van der Waals MOSFETs through layer-by-layer chalcogen substitutions

In two-dimensional transition-metal dichalcogenides (TMDCs), the local electrostatic field of the chalcogen p -orbitals dictates the crystal field splitting of the transition metal d -orbitals, stabilizing diverse electronic states from semiconducting and semimetallic to exotic t...

Variational Auto Encoder for automated structure segmentation of materials

Atomic-scale structural heterogeneity plays a crucial role in determining the properties of nanomaterials and complex energy systems. High-resolution STEM imaging provides critical insights into these structures, but conventional segmentation techniques often struggle with intric...

Quantum Dot-Induced Kinetic Bottleneck in Singlet Exciton Relaxation of Conjugated Polymer Aggregates

Abstract We designed hybrid aggregate model systems with cascade energy alignment from conjugated polymers (CPs) to quantum dots (QDs) to investigate the effects of QDs on CP singlet (S1) excitons. Radiative recombination of S1 excitons occurs within 1 ps in the chlorinated CP/QD...

Electrical injection of meron-antimeron pairs into a magnetic domain wall

Topological spin textures, such as merons and antimerons, have garnered significant attention for their potential in spintronic devices due to their inherent topological stability. However, achieving precise electrical control over these topological textures has remained challeng...

Vacuum-based long-term thermal stability evaluation of metal-organic precursors for atomic layer deposition

Understanding the long-term thermal stability of metal-organic precursors is critical for maintaining consistent and reliable atomic layer deposition (ALD) performance. Conventional evaluations, such as thermogravimetric analysis (TGA) and bulk long-term thermal stability tests i...

Local bandgap and optoelectronic measurement using monochromated STEM-VEELS: fundamentals, challenges, and recent advances

Optoelectronic characterization of local bandgap, dielectric response, and plasmon at the nanometer scale has become increasingly important for understanding and optimizing modern electronic, optoelectronic, and quantum materials. Conventional optical techniques generally provide...

Vertical sensor design with amplified capacitive response for improved humidity sensing

We propose a novel vertical capacitive humidity sensor capable of transducing the resistance variation of a humidity-sensitive material into a corresponding capacitance change. The proposed hydroxyethyl cellulose-based vertical structure expands the distribution of electric flux...

Round robin test on polystyrene bead number concentration measurement using flow cytometry and commercial automated particle counters

Abstract Reliable particle counting is critical for applications such as clinical monitoring and cell therapy manufacturing. However, various particle counters using different measurement principles are employed, and the absence of reference materials makes standardization challe...