Physical shadow growth is a vacuum deposition technique that permits a wide variety of 3D‐shaped nanoparticles and structures to be fabricated from a large library of materials. Recent advances in ...the control of the shadow effect at the nanoscale expand the scope of nanomaterials from spherical nanoparticles to complex 3D shaped hybrid nanoparticles and structures. In particular, plasmonically active nanomaterials can be engineered in their shape and material composition so that they exhibit unique physical and chemical properties. Here, the recent progress in the development of shadow growth techniques to realize hybrid plasmonic nanomaterials is discussed. The review describes how fabrication permits the material response to be engineered and highlights novel functions. Potential fields of application with a focus on photonic devices, biomedical, and chiral spectroscopic applications are discussed.
Recent progress in the development of physical shadow growth techniques to realize various 3D hybrid plasmonic nanoparticles and structures is summarized. Such nanoparticles and structures can be engineered in their shape and material composition so that they exhibit unique plasmonic properties. Novel functions and potential fields of application including photonic devices, biomedical applications, and chiral spectroscopy are highlighted.
Full text
Available for:
BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Underwater adhesion processes in nature promise controllable assembly of functional nanoparticles for industrial mass production; However, their artificial strategies have faced challenges to ...uniformly transfer nanoparticles into a monolayer, particularly those below 100 nm in size, over large areas. Here a scalable “one‐shot” self‐limiting nanoparticle transfer technique is presented, enabling the efficient transport of nanoparticles from water in microscopic volumes to an entire 2‐inch wafer in a remarkably short time of 10 seconds to reach near‐maximal surface coverage (≈40%) in a 2D mono‐layered fashion. Employing proton engineering in electrostatic assembly accelerates the diffusion of nanoparticles (over 50 µm2/s), resulting in a hundredfold faster coating speed than the previously reported results in the literature. This charge‐sensitive process further enables “pick‐and‐place” nanoparticle patterning at the wafer scale, with large flexibility in surface materials, including flexible metal oxides and 3D‐printed polymers. As a result, the fabrication of wafer‐scale disordered plasmonic metasurfaces in seconds is successfully demonstrated. These metasurfaces exhibit consistent resonating colors across diverse material and geometrical platforms, showcasing their potential for applications in full‐color painting and optical encryption devices.
Proton‐assisted assembly, inspired by Mussel's underwater adhesion, promises scalable but swift self‐limiting assembly of functional nanoparticles for industrial mass production. The efficient transport of nanoparticles is realized from a microscopic volume of water into the wafer‐scale monolayers within several seconds, stemming from the electrostatically accelerated nanoparticle's diffusion.
Full text
Available for:
BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Plasmonic nanoparticles serve as nonfading pigments for vibrant outdoor glasses and smart windows, offering vivid colors under sunlight with exceptional spatial resolution. However, simultaneously ...achieving the desired plasmonic coloration in both reflection and transmission with a full‐color gamut remains a formidable challenge, especially when using a single fabrication method. Here, a facile physical triple co‐deposition method to construct scalable plasmonic superstructures, optimal for dichroic color engineering is demonstrated. A key feature of such all‐in‐one plasmonic superstructures lies in extensive color performance in transmission and reflection modes, spanning from transparent invisibility to vivid full colors across the wavelength range of over 600 nm. This exceptional coloration fidelity stems from their 3D‐stacked nanocomposite where plasmonic nanoparticles incorporate a random but uniform distribution within a glass matrix. Wafer‐scale rich and dynamic color images useful for colorful data storage and steganography, as demonstrated through layer‐by‐layer color painting with combinatorial plasmonic superstructures are shown.
Plasmonic nanocomposite superstructures are fabricated through a facile triple co‐deposition process where the metal nanoparticles are incorporated within a glass matrix. The combinatorial engineering in their material composition and thickness offers extensive color performance in transmission and reflection modes, spanning from transparent to full colors, enabling wafer‐scale rich and dynamic color images useful for colorful data storage and steganography.
Full text
Available for:
BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
3D‐shaped artificial Mg nano‐rotamers with a programmable dihedral angle between two plasmonic arms, designed to exhibit both programmable linear and circular polarization properties, are presented. ...The nanoscale physical shadow growth technique offers precise control over the angular alignment in these nanostructures with 1° angular precision, thus controlling their symmetry from achiral C2v and C2h to chiral C2. As a result, they give rise to a wide range of polarization‐resolved coloration, spanning from invisible to visible colors with 46% transmission contrast for linear polarization while exhibiting 0.08 g‐factor in visible for circular polarization. These nano‐rotamers hold great potential for various applications in adaptive photonic filters, memory, and anticounterfeiting devices, benefiting from their tunable plasmonic properties.
The physical shadow growth at the nanoscale offers a wafer‐scale array of 3D‐shaped artificial Mg nano‐rotamers with a programmable dihedral angle between two plasmonic arms. They are designed to exhibit programmable both linear and circular polarization‐resolved colorations, spanning from invisible to visible colors, which is potentially useful for various applications in nanophotonic devices.
Full text
Available for:
BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Glucagon-like peptide-1 (GLP-1), released from gut endocrine L cells in response to glucose, regulates appetite, insulin secretion, and gut motility. How glucose given orally, but not systemically, ...induces GLP-1 secretion is unknown. We show that human duodenal L cells express sweet taste receptors, the taste G protein gustducin, and several other taste transduction elements. Mouse intestinal L cells also express α-gustducin. Ingestion of glucose by α-gustducin null mice revealed deficiencies in secretion of GLP-1 and the regulation of plasma insulin and glucose. Isolated small bowel and intestinal villi from α-gustducin null mice showed markedly defective GLP-1 secretion in response to glucose. The human L cell line NCI-H716 expresses α-gustducin, taste receptors, and several other taste signaling elements. GLP-1 release from NCI-H716 cells was promoted by sugars and the noncaloric sweetener sucralose, and blocked by the sweet receptor antagonist lactisole or siRNA for α-gustducin. We conclude that L cells of the gut "taste" glucose through the same mechanisms used by taste cells of the tongue. Modulating GLP-1 secretion in gut "taste cells" may provide an important treatment for obesity, diabetes and abnormal gut motility.
Full text
Available for:
BFBNIB, NMLJ, NUK, PNG, SAZU, UL, UM, UPUK
The Iris series Chinenses in Korea comprises four species (I. minutoaurea, I. odaesanensis, I. koreana, and I. rossii), and the group includes some endangered species, owing to their high ornamental, ...economic, and conservation values. Among them, the putative allotetraploid, Iris koreana (2n = 4x = 50), is hypothesized to have originated from the hybridization of the diploids I. minutoaurea (2n = 2x = 22) and I. odaesanensis (2n = 2x = 28) based on morphological characters, chromosome numbers, and genome size additivity. Despite extensive morphological and molecular phylogenetical studies on the genus Iris, little is known about Korean irises in terms of their complete chloroplast (cp) genomes and molecular cytogenetics that involve rDNA loci evolution based on fluorescence in situ hybridization (FISH). This study reports comparative analyses of the karyotypes of the three Iris species (I. koreana, I. odaesanensis, and I. minutoaurea), with an emphasis on the 5S and 35S rDNA loci number and localization using FISH together with the genome size and chromosome number. Moreover, the cp genomes of the same individuals were sequenced and assembled for comparative analysis. The rDNA loci numbers, which were localized consistently at the same position in all species, and the chromosome numbers and genome size values of tetraploid Iris koreana (four 5S and 35S loci; 2n = 50; 1C = 7.35 pg) were additively compared to its putative diploid progenitors, I. minutoaurea (two 5S and 35S loci; 2n = 22; 1C = 3.71 pg) and I. odaesanensis (two 5S and 35S loci; 2n = 28; 1C = 3.68 pg). The chloroplast genomes were 152,259–155,145 bp in length, and exhibited a conserved quadripartite structure. The Iris cp genomes were highly conserved and similar to other Iridaceae cp genomes. Nucleotide diversity analysis indicated that all three species had similar levels of genetic variation, but the cp genomes of I. koreana and I. minutoaurea were more similar to each other than to I. odaesanensis. Positive selection was inferred for psbK and ycf2 genes of the three Iris species. Phylogenetic analyses consistently recovered I. odaesanensis as a sister to a clade containing I. koreana and I. minutoaurea. Although the phylogenetic relationship, rDNA loci number, and localization, together with the genome size and chromosome number of the three species, allowed for the inference of I. minutoaurea as a putative maternal taxon and I. odaesanensis as a paternal taxon, further analyses involving species-specific molecular cytogenetic markers and genomic in situ hybridization are required to interpret the mechanisms involved in the origin of the chromosomal variation in Iris series Chinenses. This study contributes towards the genomic and chromosomal evolution of the genus Iris.
Full text
Available for:
IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
Iris ruthenica Ker Gawl. and I. uniflora Pall. ex Link, which are rare and endangered species in Korea, possess considerable horticultural and medicinal value among Korean irises. However, ...discrimination of the species is hindered by extensive morphological similarity. Thus, the aim of the present study was to identify discriminating features by comparing the species' complete plastid genome (i.e., plastome) sequences and micromorphological features, including leaf margins, stomatal complex distribution (hypostomatic vs. amphistomatic leaves), anther stomata density, and tepal epidermal cell patterns. Plastome comparison revealed slightly divergent regions within intergenic spacer regions, and the most variable sequences, which were distributed in non-coding regions, could be used as molecular markers for the discrimination of I. ruthenica and I. uniflora. Phylogenetic analysis of the Iris species revealed that I. ruthenica and I. uniflora formed a well-supported clade. The comparison of plastomes and micromorphological features performed in this study provides useful information for elucidating taxonomic, phylogenetic, and evolutionary relationships in Iridaceae. Further studies, including those based on molecular cytogenetic approaches using species specific markers, will offer insights into species delimitation of the two closely related Iris species.
Full text
Available for:
IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
Electrostatic Nanoparticle Coating
In article 2313299, Doeun Kim, Hyeon‐Ho Jeong, and co‐authors demonstrate a scalable “one‐shot” self‐limiting nanoparticle assembly inspired by the underwater ...adhesion observed in mussels. This technique facilitates the formation of mono‐layered nanoparticle assemblies, extending from micro‐patterns to covering an entire 2‐inch wafer. The authors illustrate this capability through the creation of disordered plasmonic metasurfaces, highlighting their features in full‐color painting and charge‐sensitive “pick‐and‐place” nanoparticle patterning.
Full text
Available for:
BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
Taste sensors using photonics, termed artificial photonic tongues, have emerged as a promising platform for intuitive taste discrimination. However, the need for complex binding protocols for each ...taste profile limits their applicability to a narrow range of taste molecules. Here, we introduce an intriguing “binding-free” approach to molecular taste sensing using plasmonics, eliminating the requirement for physical or chemical binding protocols. We develop a wafer-scale plasmonic metasurface constructed by coating metallic nanoparticles in a scalable manner onto a metallic mirror. This metasurface functions to detect molecular refractive indices and surface tensions via 2D projection optical images of an array of liquid droplets containing the taste molecules on top, which can immediately visualize and distinguish between the five basic tastes of molecules (including their mixtures) as well as other additional spicy and alcoholic tastes. We anticipate that this intuitive and rapid taste-sensing approach has the potential to establish a user-friendly and portable taste-sensing platform.
Full text
Available for:
IJS, KILJ, NUK, PNG, UL, UM
The genus
Disporum
(Colchicaceae) comprises approximately 20 species distributed throughout Asia, of which four species (
Disporum sessile
,
D. smilacinum
,
D. uniflorum
, and
D. viridescens
) are ...currently recognized in Korea. Mixed-ploidy variations, including odd-ploidy levels within the same species, are important in evolution as they enable backcrosses with their parental cytotypes. However, Korean
Disporum
species have not been examined in detail with regard to ploidy variation and pollen fertility. Therefore, we document the occurrence of diploids and triploids among the
Disporum
spp. in Korea and report for the first time that
D. sessile
and
D. smilacinum
are both diploid (2
n
= 2
x
= 16) and triploid (2
n
= 3
x
= 24), though they were previously known as diploids from Korean natural populations. The total haploid chromosome length is variable, ranging from 67.32 µm in diploid
D. smilacinum
to 108.11 µm in triploid
D. smilacinum
; however, the karyotypes of the investigated species are similar regardless of the ploidy levels. The occurrence of fertile pollen grains from triploid individuals is approximately two-thirds that from diploid species, but triploid plants show no pollen tube germination compared to their diploid counterparts. Overall, this study presents the first comprehensive chromosomal and pollen fertility data for Korean
Disporum
species, and thus lays the foundation for better understanding the evolution and diversification of morphologically and cytologically variable plant groups.
Full text
Available for:
EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
PDF
