Young‐Seok Shim

One of the well-known strategies for achieving high-performance light-activated gas sensors is to design a nanostructure for effective surface responses with its geometric advances. However, no study has gone beyond the benefits of the large surface area and provided fundamental strategies to offer a rational structure for increasing their optical and chemical performances. Here, a new class of UV-activated sensing nanoarchitecture made of highly periodic 3D TiO₂, which facilitates 55

For the last several years, indoor air quality monitoring has been a significant issue due to the increasing time portion of indoor human activities. Especially, the early detection of volatile organic compounds potentially harmful to the human body by the prolonged exposure is the primary concern for public human health, and such technology is imperatively desired. In this study, highly porous and periodic 3D TiO₂ nanostructures are designed and studied for this concern. Specifically

AI-assisted electronic nose systems often emphasize sensitivity-driven datasets, overlooking the comprehensive analysis of gaseous chemical attributes critical for precise gas identification. Conventional fabrication methods generate inconsistent datasets and focus primarily on improving classification accuracy through deep learning, neglecting the fundamental role of sensor material design. This study addresses these challenges by developing a highly reliable sensor platform to standardize gas

NO₂ is a major air pollutant that should be monitored due to its harmful effects on the environment and human health. Semiconducting metal oxide-based gas sensors have been widely explored owing to their superior sensitivity towards NO₂, but their high operating temperature (>200 °C) and low selectivity still limit their practical use in sensor devices. In this study, we decorated graphene quantum dots (GQDs) with discrete band gaps onto tin oxide nanodomes (GQD@SnO<sub>2</

Gas sensors based on semiconductor metal oxides (SMOs) have gained widespread attention for Internet of Things applications; however, high operating temperatures and low gas selectivity limit their applications. Recently, metal–organic frameworks (MOFs) have demonstrated potential in enhancing gas selectivity through the physical filtration of gas molecules based on their kinetic diameters. However, their application has been predominantly limited to simplistic nanostructured sensors. These sens

Although various fabrication methods for metal–oxide nanostructures have been well developed for enlarged surface area, numerous efforts to further enhance the effective surface area for their chemical sensor applications are still being studied. Herein, a high‐power laser is irradiated on the existing metal–oxide nanostructures to expose the hidden inner surface of the nanostructures for full participation in the surface gas‐sensing reactions, resulting in extraordinary gas‐sensing performance.

Emerging devices in the modern information era must demonstrate higher density, superior data processing performance, lower energy consumption, greater adaptability, multifunctionality, and compatibility with streamlined manufacturing. Owing to the limitations of current Si-based devices in meeting these demands, researchers are actively exploring novel active materials for future technologies, including metal oxide semiconductors, organic semiconductors, and two-dimensional (2D) materials. Hali

Semiconductor gas sensors based on metal oxide are widely used in a number of applications, from health and safety to energy efficiency and emission control. Nanomaterials including nanowires, nanorods, and nanoparticles have dominated the research focus in this field owing to their large number of surface sites that facilitate surface reactions. Recently, metal oxide hollow structures using soft templates have been developed owing to their high sensing properties with large-area uniformity. Her

target. To determine the possible role of EBV infections in the clinical course of JRA, we attempt to demonstrate the radiologic changes and the frequency prescription of etanercept rather than classic therapy. Methods. Total of 87 patients with JRA, who were hospitalized in Hangang Sacred Hospital and Kangnam Sacred Hospital in Seoul from 2002 to 2010, were assessed serologically for EBV infection (anti EBV VCA IgM and IgG) at admission. Patients with JRA were devided 2 groups, one is EBV VCA I

Conventional sensing platforms for plant health monitoring are often limited by high operating temperatures, rigid substrates, and poor compatibility with ambient, power-constrained, or biologically sensitive environments. These limitations hinder their integration into emerging platforms such as smart agriculture and plant-interfaced electronics, where mechanical flexibility, energy efficiency, and low thermal budgets are essential. This paper reports a scalable, thermally passive NO<sub>2</sub

The functional convergence of the Internet with radio-frequency identification and sensors has led to the era of the Internet of Things (IoT), which is a computing concept in which everyday objects are online and communicate via the Internet. In particular, the IoT is effective and appropriate for monitoring and controlling objects in hazardous environments to enable people to access them. In order to apply gas sensors to the IoT, operation at room temperature (low power consumption), a high eff

One-dimensional (1D) nanostructures allow for precise control of geometrical size and shape, offering greater design flexibility than other nanostructures. 1D nanostructures, in particular, hold immense potential for revolutionizing the gas sensor field, owing to their extensive surface areas conducive to chemical reactions. To harness this potential, researchers have dedicated their efforts to developing fabrication methods that incorporate 1D nanostructures into gas sensor applications. Variou