Gwangju Institute of Science and Technology

Gwangju Institute of Science and Technology Researchers Develop Metal-Enhanced Fluorescence Probes for Influenza A Virus Detection

Retrieved on: 
Wednesday, November 8, 2023

In recent years, fluorescence-based lateral flow immunoassay (LFI) has gained popularity as a diagnostic tool for viral detection.

Key Points: 
  • In recent years, fluorescence-based lateral flow immunoassay (LFI) has gained popularity as a diagnostic tool for viral detection.
  • It is a rapid virus detection platform which uses molecules that glow under special lighting conditions in the presence of a viral load.
  • However, the performance of this detection platform is limited due to several issues related to detection sensitivity.
  • Furthermore, they demonstrated the applicability of optimized MEF probes by incorporating it onto a LFI platform for the detection of influenza A virus (IAV).

NEO Battery Materials Appoints Dr. Jae Ha Woo, Ex-General Motors Battery Research Engineer, as New Chief Science Officer

Retrieved on: 
Friday, November 3, 2023

His research expertise focuses on the synthesis of silicon anode materials for high-energy batteries in long-range EVs and on interfacial engineering for sulfide-based ASSBs.

Key Points: 
  • His research expertise focuses on the synthesis of silicon anode materials for high-energy batteries in long-range EVs and on interfacial engineering for sulfide-based ASSBs.
  • Working as a Scientific Research Engineer at General Motors’ Global R&D Centre through Optimal Inc., Dr.
  • Woo participated in research projects regarding nanostructured silicon anode materials with artificial solid electrolyte interphase (SEI), lithium-ion battery performance optimization, and electrode material synthesis.
  • Mr. Spencer Huh, President & CEO of NEO, commented, “We are highly excited to appoint Dr. Jae Ha Woo as our new CSO.

Gwangju Institute of Science and Technology Scientists Develop Deep Learning-Based Biosensing Platform to Count Viral Particles Better

Retrieved on: 
Wednesday, October 18, 2023

The COVID-19 pandemic has highlighted the need for accurate yet decentralized diagnostic tests that do not involve complex and time-consuming processes needed for conventional laboratory-based tests.

Key Points: 
  • The COVID-19 pandemic has highlighted the need for accurate yet decentralized diagnostic tests that do not involve complex and time-consuming processes needed for conventional laboratory-based tests.
  • A popular point-of-care diagnostic tool for quantifying viral loads is bright-field microscopic imaging.
  • Recent studies have found that Gires-Tournois (GT) biosensors, a type of nanophotonic resonators, can detect minuscule virus particles and produce colorful micrographs (images taken through a microscope) of viral loads.
  • Boosted by the performance of CNNs, the biosensing system can also indicate the severity of the infection from asymptomatic to severe based on the viral load.

GIST Scientists Advance Voice Pathology Detection via Adversarial Continual Learning

Retrieved on: 
Tuesday, October 17, 2023

In this context, voice pathology detection (VPD) has received much attention as a non-invasive way to automatically detect voice problems.

Key Points: 
  • In this context, voice pathology detection (VPD) has received much attention as a non-invasive way to automatically detect voice problems.
  • It consists of two processing modules: a feature extraction module to characterize normal voices and a voice detection module to detect abnormal ones.
  • Machine learning methods like support vector machines (SVM) and convolutional neural networks (CNN) have been successfully utilized as pathological voice detection modules to achieve good VPD performance.
  • Herein, they incorporated adversarial regularization during the continual learning process.

Gwangju Institute of Science and Technology Researchers Reveal the Effect of AlN Surface Pits on GaN Remote Epitaxy

Retrieved on: 
Wednesday, September 13, 2023

GWANGJU, South Korea, Sept. 13, 2023 /PRNewswire/ -- Remote epitaxy has been gaining attention in the field of semiconductor manufacturing for growing thin films that copy the crystal structure of the template, which can later be exfoliated to form freestanding membranes. However, harsh epitaxy conditions can often cause damage to the template materials, such as in the case of remote epitaxy of GaN thin films, promising materials for light-emitting diodes, photodetectors, and power electronic devices, on graphene/AlN templates.

Key Points: 
  • GaN remote heteroepitaxy has not been achieved by a standard metal–organic chemical vapor deposition (MOCVD) technique due to the high temperatures involved in the process.
  • The researchers first performed an annealing test at 950 °C for 5 minutes to check the thermal stability of graphene on AlN.
  • The exfoliation of the thus-grown GaN thin films was used as a proof of success of the remote epitaxy process.
  • These results exemplify the importance of chemical and topographic properties of templates for successful remote epitaxy," highlights Prof. Lee.

Gwangju Institute of Science and Technology Researchers Design Efficient Iridium Catalyst for Hydrogen Generation

Retrieved on: 
Wednesday, August 16, 2023

GWANGJU, South Korea, Aug. 16, 2023 /PRNewswire/ -- The energy demands of the world are ever increasing. In our quest for clean and eco-friendly energy solutions, transportable hydrogen energy offers considerable promise. In this regard, proton exchange membrane water electrolyzers (PEMWEs) that convert excess electric energy into transportable hydrogen energy through water electrolysis have garnered remarkable interest. However, their widescale deployment for hydrogen production remains limited due to slow rates of oxygen evolution reaction (OER) – an important component of electrolysis – and high loading levels of expensive metal oxide catalysts, such as iridium (Ir) and ruthenium oxides, in electrodes. Therefore, developing cost-effective and high-performance OER catalysts is necessary for the widespread application of PEMWEs.

Key Points: 
  • In this regard, proton exchange membrane water electrolyzers (PEMWEs) that convert excess electric energy into transportable hydrogen energy through water electrolysis have garnered remarkable interest.
  • Recently, a team of researchers from Korea and USA, led by Professor Chanho Pak from Gwangju Institute of Science and Technology in Korea, has developed a novel mesoporous tantalum oxide (Ta2O5)-supported iridium nanostructure catalyst via a modified formic acid reduction method that achieves efficient PEM water electrolysis.
  • The study was co-authored by Dr. Chaekyung Baik, a post-doctoral researcher at Korea Institute of Science and Technology (KIST).
  • Together, this development takes us one step closer to achieving a sustainable transportable hydrogen energy solution and, in turn, carbon neutrality.

Gwangju Institute of Science and Technology Researchers Develop Highly Efficient Organometal Halide Perovskite Photoelectrodes for Water Splitting

Retrieved on: 
Thursday, August 10, 2023

GWANGJU, China, Aug. 10, 2023 /PRNewswire/ -- Currently, hydrogen is mainly produced by natural gas, which, unfortunately, also generates greenhouse gases such as carbon dioxide as by-products. Scientists argue that hydrogen produced this way, while economical, is not truly sustainable, and thus requires a more eco-friendly approach for its generation. Photoelectrochemical (PEC) water splitting based on solar energy is one such promising approach. However, its widespread application is limited by a lack of efficient photoanodes for catalyzing the rate-limiting oxygen evolution reaction (OER), an important reaction in PEC water splitting.

Key Points: 
  • Photoelectrochemical (PEC) water splitting based on solar energy is one such promising approach.
  • However, its widespread application is limited by a lack of efficient photoanodes for catalyzing the rate-limiting oxygen evolution reaction (OER), an important reaction in PEC water splitting.
  • Recently, organometal halide perovskites (OHPs) have emerged as a promising photoanode material on this front.
  • Further, it enhanced the light-soaking stability of the OHP cell, a crucial factor in real-world PEC water splitting.

Gwangju Institute of Science and Technology Team Clinches Top Spot in IEEE AI Audio Recognition Challenge

Retrieved on: 
Wednesday, June 28, 2023

Now, a research team from the Gwangju Institute of Science and Technology (GIST) has made significant strides in enhancing the performance of acoustic recognition to achieve diverse audio intelligence.

Key Points: 
  • Now, a research team from the Gwangju Institute of Science and Technology (GIST) has made significant strides in enhancing the performance of acoustic recognition to achieve diverse audio intelligence.
  • Their groundbreaking work bagged the top spot in the indoor acoustic event detection category at "DCASE Challenge 2023" organized by IEEE.
  • To this end, a collaborative research team from GIST (with Acting President Rae-gil Park), have now excelled in developing an excellent acoustic recognition technique using AI.
  • The GIST-Hanwha Vision team made significant strides in enhancing the performance of acoustic recognition by integrating a range of AI technologies capable of achieving diverse audio intelligence.

Gwangju Institute of Science and Technology Researchers Enhance Electron-Phonon Coupling Strength in Low-Dimensional Strontium Ruthenate

Retrieved on: 
Thursday, June 22, 2023

GWANGJU CITY, South Korea, June 22, 2023 /PRNewswire/ -- Electrons inside crystals interact closely with phonons, defined as the discrete unit of crystal vibrations. The electron–phonon coupling strength is an important fundamental physical quantity in solid state physics, determining electrodynamic behaviors and correlated functionalities of a material. This, in turn, makes for interesting material properties with advanced applications. However, the coupling strength is typically considered an intrinsic material property without any provision for controlling it for desired applications.

Key Points: 
  • The electron–phonon coupling strength is an important fundamental physical quantity in solid state physics, determining electrodynamic behaviors and correlated functionalities of a material.
  • However, the coupling strength is typically considered an intrinsic material property without any provision for controlling it for desired applications.
  • In their study, the researchers demonstrated an atomic-scale engineering of the electron–phonon coupling strength in synthetic strontium ruthenate/strontium titanate (SRO/STO) superlattices (a periodic structure of layers of two materials).
  • Remarkably, a reduction in the dimensionality from 3D (bulk) to quasi-2D led to a 300-fold increase in the electron–phonon coupling strength.

Gwangju Institute of Science and Technology Researchers Improve the Solubility of Redox Molecules for Enhanced Energy Storage Systems

Retrieved on: 
Friday, June 2, 2023

This transition can be supported by improving the efficiency of energy storage systems for safer and stable operations, sustainability, high energy/ power density.

Key Points: 
  • This transition can be supported by improving the efficiency of energy storage systems for safer and stable operations, sustainability, high energy/ power density.
  • Research on this front has focused on molecular engineering approaches to the development of aqueous-based redox-enhanced electrochemical capacitors (redox ECs).
  • Redox ECs are a type of advanced hybrid electric double-layer capacitors that use redox-active molecules at the electrode-electrolyte interface to increase the energy density.
  • Now, researchers from Korea have used hydrotropic-supporting electrolyte (HSE) as an approach to enhancing the solubility of the organic redox-active species.