The concurrent enhancement of the short-circuit current (JSC) and open-circuit voltage (VOC) is a key problem in the preparation of efficient organic solar cells (OSCs). In this paper, we report...

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An internal and marginal fit between prosthesis and abutment is an important factor of the durability of dental prosthesis. In this paper, we have proposed the use of swept-source optical coherence tomography (OCT) as a novel application for non-ionized and high-resolution measurements of internal and marginal discrepancies at anatomically critical four points, such as occlusal, angle, axial, and margin during prosthesis attachment. A tooth model was fabricated by a 3D printing technique, and the dental prosthesis was designed using dental CAD software. The cross-sectional images along with intensity peak profile analysis of the sample were acquired using the OCT system for measurements of fit. The demonstrated qualitative and quantitative evaluations can be well-utilized for assessment of the internal and marginal fit of dental prosthesis. INDEX TERMS Swept-source optical coherence tomography, dental prosthesis, internal and marginal fit, intensity analysis.

Solution-processable precrystalline nanowires (NWs) of conjugated polymers (CPs) have garnered significant attention in fundamental research based on crystallization-driven self-assembly and in the roll-to-roll fabrication of optoelectronic devices such as organic...

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Chiral plasmonic nanoparticle (NP) superstructure can serve as a promising scaffold for chirooptical sensors, circular polarizers, and optical metamaterials. The helical architecture, a representative NP assembly, can enhance optical chirality,...

The aim of this study was to quantitatively assess the residual adhesive on orthodontic ceramic bracket-removed dental surface. In orthodontic process, ceramic bracket was repeated debonding physically, then the adhesive remained on the dental surface. The residual adhesive caused a lack of adhesive strength between dental and ceramic bracket. Since commonly used adhesive in orthodontics is translucent, residual adhesive is hard to be detected with conventional microscopes. Therefore, 1310 nm center wavelength swept-source OCT system based on laboratory customized image processing algorithm was used for the precise detection of residual adhesive on tooth surface. The algorithm separates residual adhesive from dental surface by comparing the height of adjacent B-scan images, while providing color-scaled images emphasizing the thickness information of residual adhesive. Finally, the acquired results were compared with microscopic and adhesive remnant index scoring gold standards, while the comparison confirmed the potential merits and the improvements of the proposed method over gold standards.

Conjugated polymers are a promising material scaffold alternative to inorganic semiconductors for large-area flexible, stretchable electronics because of their tunable optoelectronic properties, mechanical compliance, compositional tailorability, light weight, and low-cost solution processability. In particular, solution-state crystallization-driven assembly of conjugated block copolymers (BCPs) consisting of a rigid rod-like conjugated polymer and a flexible coil-like polymer is attracting growing attention as a nanomaterial manufacturing strategy to customize such functions and performance based on the understanding of hierarchical, complex solution-state self-assembly of BCP into nanoparticles. In this Perspective, we highlight substantial advances in developing crystallization-driven assembly of conjugated BCPs by discussing fabrication methods and nanoaggregate formation mechanisms, accessible controls on molecular packing, arrangement, and orientation within the aggregates and nanostructural diversity, and their applications. The resultant nanoparticles are under exploration in various fields, with potential from optoelectronics to biomedicine. The conjugated BCPs can form the spontaneous nanoarchitecture by relatively subtle complex thermodynamic and kinetic pathways in solution-state molecular assembly. The stepwise crystallization-driven assembly of conjugated BCPs involving a crystal seed formation and crystal growth, which mainly uses strong π–π interactions as a driving force, should be closely understood but remain elusive. It is necessary to develop a strategy to ensure nanoparticle uniformity in size and shape by controlling dynamic chemical bonds between building blocks in addition to discovering unique crystalline nanostructures to expand their applicability as reproducible and reliable functional materials. The analysis tools are also needed to verify successful control directly. We will discuss current issues and future directions from a polymer/supramolecular nanochemistry point of view to provide a general platform.