염지현 교수

Chiral inorganic nanostructures have high circular dichroism, but real-time control of their optical activity has so far been achieved only by irreversible chemical changes. Field modulation is a far more desirable path to chiroptical devices. We hypothesized that magnetic field modulation can be attained for chiral nanostructures with large contributions of the magnetic transition dipole moments to polarization rotation. We found that dispersions and gels of paramagnetic Co₃O<sub>4</

Chirality is ubiquitous in nature and hard-wired into every biological system. Despite the prevalence of chirality in biological systems, controlling biomaterial chirality to influence interactions with cells has only recently been explored. Chiral-engineered supraparticles (SPs) that interact differentially with cells and proteins depending on their handedness are presented. SPs coordinated with d-chirality demonstrate greater than threefold enhanced cell membrane penetration in breast, cervica

ConspectusChirality is ubiquitous in the universe and in living creatures over detectable length scales from the subatomic to the galactic, as exemplified in the two extremes by subatomic particles (neutrinos) and spiral galaxies. Between them are living creatures that display multiple levels of chirality emerging from hierarchically assembled asymmetric building blocks. Not too far from the bottom of this pyramid are the foundational building blocks with chiral atomic centers on <i>sp</i><sup><

Research on chiral nanomaterials (NMs) has grown radically with a rapid increase in the number of publications over the past decade. It has attracted a large number of scientists in various fields predominantly because of the emergence of unprecedented electric, optical, and magnetic properties when chirality arises in NMs. For applications, it is particularly informative and fascinating to investigate how chiral NMs interact with electromagnetic waves and magnetic fields, depending on their int

Chiral nanomaterials provide a rich platform for versatile applications. Tuning the wavelength of polarization rotation maxima in the broad range including short-wave infrared (SWIR) is a promising candidate for infrared neural stimulation, imaging, and nanothermometry. However, the majority of previously developed chiral nanomaterials reveal the optical activity in a relatively shorter wavelength range (ultraviolet-visible, UV-vis), not in SWIR. Here, we demonstrate a versatile method to synthe

Chirality, the property whereby an object or a system cannot be superimposed on its mirror image, prevails amongst nature over various scales. Especially in biology, numerous chiral building blocks and chiral-specific interactions are involved in many essential biological activities. Despite the prevalence of chirality in nature, it has been no longer than 70 years since the mechanisms of chiral-specific interactions drew scientific attention and began to be studied. Owing to the advent of chira

ADVERTISEMENT RETURN TO ISSUEViewpointNEXTAtomic Chirality and a Materials RevolutionJihyeon Yeom*Jihyeon YeomDepartment of Materials Science and Engineering, Department of Biological Sciences, KAIST Institute of Health Science and Technology, Korea Advanced Science and Technology (KAIST), Deajeon 34141, Republic of Korea*Email: [email protected]More by Jihyeon YeomView Biographyhttps://orcid.org/0000-0002-3032-8301Cite this: Acc. Mater. Res. 2021, 2, 7, 471–476Publication Date (Web):May 27, 202

mRNA therapeutics present a promising strategy for the treatment of human diseases, which requires a carrier to protect the mRNA and ensure its effective cellular delivery. However, research on how the surface physicochemical properties of the mRNA carriers affect the efficiency of delivery of mRNA into cells has been limited thus far. Here, we report that chirality control of lipid nanoparticles (LNPs) can enhance the delivery and transfection efficiency of cargo mRNA into cells. We prepared ch

Chirality is widespread in nature and governs the properties of various materials including inorganic nanomaterials. However, previously reported chiral inorganic materials have been limited to a handful of compositions owing to the physicochemical restrictions that impart chirality. Herein, chiral nanopaint applicable to diverse inorganic materials is presented. Various metal oxide nanoparticles (NPs) show chiroptical properties after coating with our chiral nanopaint, while maintaining their p

Optoelectronic devices using circularly polarized light (CPL) offer enhanced sensitivity and specificity for efficient data processing. There is a growing demand for CPL sensing mediums with strong optical activity, stability and sensitivity, multiple transition bands, and environmental compatibility. Here, defect-engineered chiroferromagnetic quantum dots (CFQDs) are used as a new type of CPL sensing material. By inducing amorphization defects through chiral molecules, CFQDs with high unpaired

Abstract High‐index dielectric nanostructures offer strong magnetic and electric resonances in the visible range and low optical losses, stimulating research interest in their use for light manipulation technologies. Lithographic fabrication of dielectric nanostructures, while providing precise control over the pattern dimensions, limits the scalability of this approach for practical applications due to an inefficient fabrication process and limited production quantity. Here, the colloidal synth

Chiroptical activity over a broad range is expected to enable numerous applications including bioimaging and nanothermometers. However, understanding the chemical mechanism behind producing multiscale chirality for broad range chiroptical activities remains challenging. Here, we present a simple multiscale chiral synthesis and elucidate the underlying chemical mechanism for the self-assembly of achiral copper sulfide nanoparticles (NPs). The initially achiral NPs assemble into anisotropically tw