Constructing high-density single-walled carbon nanotubes (SWCNTs) network assemblies is essential for improving their electrical conductivity. However, controlling the nanoporosity, including specific surface area (SSA) and pore structure, is critical for maintaining reversible capacity in CNT-based energy storage systems. In this study, we investigated a solution-based strategy using acid and surfactant treatments to enhance the electrical conductivity of SWCNT networks while minimizing changes in nanoporosity. HNO3/H2SO4 acid treatment and sodium dodecyl benzene sulfonate (SDBS)- assisted dispersion were applied to form uniform, densely packed SWCNT assemblies. Acid treatment increased the SSA from 246 to 732 m2 g⁻1 and the micropore volume from 0.06 to 0.28 mL g⁻1. In contrast, SDBS treatment moderately increased the SSA (246 to 350 m2·g⁻1) with minor changes in meso/microporosity and preserved the overall pore structure well. In addition the electrical conductivity increased by a factor of 3.5 after acid treatment and by a factor of 6 after SDBS treatment, reaching 1.39 × 105 and 2.36 × 105 S m⁻1, respectively. These results demonstrate that SDBS treatment, via surfactant-driven reassembly, offers a simple, scalable, and structure-preserving strategy to tailor nanoporosity and enhance the performance of SWCNT-based electrochemical devices.

With the increasing demand for flexible electronic devices, smaller and lighter flexible supercapacitors have gained significant research attention. Among the various materials, self-supporting reduced graphene oxide (rGO) paper has emerged as one of the most promising electrode materials for supercapacitors due to its low cost, high chemical/thermal stability, and excellent electrical conductivity. Nevertheless, a major drawback of rGO paper is the limited ion diffusion between stacked rGO layers, hindering the effective formation of electrochemical double-layer at the electrode/electrolyte interface. In this study, we prepared the rGO paper derived from ball-milled followed-by water oxidation process for reducing the sheet size. The smaller-sized rGO sheets facilitated ion transport between graphene layers, promoting efficient electric double-layer formation. Moreover, the increased presence of edge planes in ball-milled rGO sheets achieved high capacitance, further enhancing the performance of rGO as an electrode material. Notably, the 2-BMOX rGO paper obtained from ball-milling and wet-oxidized graphite exhibited a capacitance of 117.9 F/g in cyclic voltammetry (CV) and 128.6 F/g in galvanostatic charge–discharge (GCD) tests, approximately twice that of conventional rGO. Additionally, the capacitance retained 91% of its initial performance after 2,000 cycles, indicating excellent cycling stability.

한국 분포가 확인되지 않았던 니토베은주둥이벌 Ectemnius nitobei (Matsumura, 1912)을 경기도 포천시 광릉숲에서 처음으로 확인하였다. 국립수목원 내 휴게광장의 가래나무과(Juglandaceae) 목재 벤치 구멍에서 암컷의 둥지 짓기 행동을 관찰하였으며, 유충의 먹이로 사용하기 위해 나방류 성충을 운반하는 행동을 확인하였다. 본 연구에서는 니토베은주둥이벌 암컷의 전신 사진, 주요 형태학적 진단 형질, 그리고 DNA 바코드 (COI) 서열을 함께 제시하여 향후 국내 분류학적 및 생태학적 연구의 기초 자료로 제공하고자 한다.

This study presents the results of a comprehensive investigation of the macrofungal diversity in South Korea conducted between 2022 and 2025. Our approach has integrated detailed morphological observations with molecular analyses of large subunit (LSU) sequences. In the present study, we have identified four species, Retiboletus fuscus, R. sinensis, R. sinogriseus, and R. zhangfeii —that were previously unrecorded in South Korea. These findings significantly enhance the current understanding of fungal biodiversity within this region and also provide essential foundational data for advancing local and international mycological research.