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In situ electron microscopy revealing dynamic structure–function relationship of heterogeneous catalyst

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  1. Article

    Open Access

    Recent advances in liquid phase transmission electron microscopy of nanoparticle growth and self-assembly

    Over the last several decades, colloidal nanoparticles have evolved into a prominent class of building blocks for materials design. Important advances include the synthesis of uniform nanoparticles with tailor...

    Joodeok Kim, Sungsu Kang, Fanrui Cheng, Yi Wang, **ngchen Ye, Jungwon Park in MRS Bulletin (2024)

  2. Article

    Open Access

    Insights into structural defect formation in individual InP/ZnSe/ZnS quantum dots under UV oxidation

    InP/ZnSe/ZnS quantum dots (QDs) stand as promising candidates for advancing QD-organic light-emitting diodes (QLED), but low emission efficiency due to their susceptibility to oxidation impedes applications. S...

    Hayeon Baek, Sungsu Kang, Junyoung Heo, Soonmi Choi, Ran Kim in Nature Communications (2024)

  3. Article

    Correction to: Risk assessment and estimation of controlling safe distance for exposure to particulate matter from outdoor secondhand tobacco smoke

    Jiyeon Yang, Shervin Hashemi, Taeyeon Kim, Jungwon Park in Air Quality, Atmosphere & Health (2024)

  4. Article

    Open Access

    Observing growth and interfacial dynamics of nanocrystalline ice in thin amorphous ice films

    Ice crystals at low temperatures exhibit structural polymorphs including hexagonal ice, cubic ice, or a hetero-crystalline mixture of the two phases. Despite the significant implications of structure-dependent...

    Minyoung Lee, Sang Yup Lee, Min-Ho Kang, Tae Kyung Won in Nature Communications (2024)

  5. Article

    Open Access

    Small, solubilized platinum nanocrystals consist of an ordered core surrounded by mobile surface atoms

    In situ structures of Platinum (Pt) nanoparticles (NPs) can be determined with graphene liquid cell transmission electron microscopy. Atomic-scale three-dimensional structural information about their physioche...

    Henry Wietfeldt, Rubén Meana-Pañeda, Chiara Machello in Communications Chemistry (2024)

  6. Article

    Open Access

    Spatiotemporally controlled drug delivery via photothermally driven conformational change of self-integrated plasmonic hybrid nanogels

    Spatiotemporal regulation is one of the major considerations for develo** a controlled and targeted drug delivery system to treat diseases efficiently. Light-responsive plasmonic nanostructures take advantag...

    Seungki Lee, Subeen Kim, Doyun Kim, Jieun You, Ji Soo Kim in Journal of Nanobiotechnology (2023)

  7. Article

    Open Access

    Critical roles of metal–ligand complexes in the controlled synthesis of various metal nanoclusters

    Metal nanoclusters (NCs), an important class of nanoparticles (NPs), are extremely small in size and possess quasi-molecular properties. Due to accurate stoichiometry of constituent atoms and ligands, NCs have...

    Ji Soo Kim, Hogeun Chang, Sungsu Kang, Seungwoo Cha, Hanguk Cho in Nature Communications (2023)

  8. Article

    Open Access

    Method for 3D atomic structure determination of multi-element nanoparticles with graphene liquid-cell TEM

    Determining the 3D atomic structures of multi-element nanoparticles in their native liquid environment is crucial to understanding their physicochemical properties. Graphene liquid cell (GLC) TEM offers a plat...

    Junyoung Heo, Dongjun Kim, Hyesung Choi, Sungin Kim, Hoje Chun in Scientific Reports (2023)

  9. Article

    Open Access

    Enhanced ferroelectric switching speed of Si-doped HfO2 thin film tailored by oxygen deficiency

    Investigations concerning oxygen deficiency will increase our understanding of those factors that govern the overall material properties. Various studies have examined the relationship between oxygen deficienc...

    Kyoungjun Lee, Kunwoo Park, Hyun-Jae Lee, Myeong Seop Song in Scientific Reports (2021)

  10. Article

    Open Access

    Initial growth dynamics of 10 nm nanobubbles in the graphene liquid cell

    The unexpected long lifetime of nanobubble against the large Laplace pressure is one of the important issues in nanobubble research and a few models have been proposed to explain it. Most studies, however, hav...

    QHwan Kim, Dongha Shin, Jungwon Park, David A. Weitz, Wonho Jhe in Applied Nanoscience (2021)

  11. Article

    Open Access

    Author Correction: Direct imaging of structural disordering and heterogeneous dynamics of fullerene molecular liquid

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    Jeongheon Choe, Yang** Lee, Jungwon Park, Yunho Kim, Chae Un Kim in Nature Communications (2020)

  12. Article

    Open Access

    Direct imaging of structural disordering and heterogeneous dynamics of fullerene molecular liquid

    Structural rearrangements govern the various properties of disordered systems and visualization of these dynamical processes can provide critical information on structural deformation and phase transformation ...

    Jeongheon Choe, Yang** Lee, Jungwon Park, Yunho Kim, Chae Un Kim in Nature Communications (2019)

  13. Article

    Open Access

    Expelled uninsured patients in a less-competitive hospital market in Florida, USA

    This research evaluates the effect of hospital competition on inward and outward patient transfers for different types of payers including the uninsured. Although it is a less spotlighted issue, an equally imp...

    Keon-Hyung Lee, Seunghoo Lim, Jungwon Park in International Journal for Equity in Health (2016)

  14. Article

    Open Access

    The association between managed care enrollments and potentially preventable hospitalization among adult Medicaid recipients in Florida

    The intent of adopting managed care plans is to improve access to health care services while containing costs. To date, there have been a number of studies that examine the relationship between managed care an...

    Jungwon Park, Keon-Hyung Lee in BMC Health Services Research (2014)