Results 91 to 100 of about 57,891 (276)

The Vegan Villain Sets Out to The End of Summer: Functionalized Coatings as Biohybrid UV‐Sensors

Advanced Materials Interfaces, EarlyView.
This study introduces biohybrid coatings incorporating E. coli biomass expressing photoconvertible fluorescent proteins as UV‐A responsive elements. Upon irradiation at 400 nm, the coatings exhibit an irreversible fluorescence shift from green to red within 15 min. Notably, the photoconversion capability is retained after >1 year of storage.
Amelie Skopp, Matea Marosevic, Broder Rühmann, Volker Sieber   +3 more
wiley   +1 more source

New bounds for the acyclic chromatic index

Discrete Mathematics, 2016
An edge coloring of a graph $G$ is called an acyclic edge coloring if it is proper and every cycle in $G$ contains edges of at least three different colors. The least number of colors needed for an acyclic edge coloring of $G$ is called the acyclic chromatic index of $G$ and is denoted by $a'(G)$.
openaire   +3 more sources

Roadmap to Precision 3D Printing of Cellulose: Rheology‐Guided Formulation, Fidelity Assessment, and Application Horizons

Advanced Materials Technologies, EarlyView.
This critical review presents a comprehensive roadmap for the precision 3D printing of cellulose. Quantitative correlations link ink formulation and rheological properties to print fidelity and final material performance. This framework guides the development of advanced functional materials, from biomedical scaffolds to electromagnetic shielding ...
Majed Amini, Hadi Hosseini, Seyyed Alireza Hashemi, Mohammad Arjmand   +3 more
wiley   +1 more source

Asymptotics of the Chromatic Index for Multigraphs

Journal of Combinatorial Theory, Series B, 1996
For a multigraph \(G\), let \(D(G)\) denote maximum degree and set \[ \Gamma(G)=\max\Biggl\{{|E(W)|\over \lfloor|W|/2\rfloor}: W\subseteq V, 3\leq |W|\equiv 1\pmod 2\Biggr\}. \] We show that the chromatic index \(\chi'(G)\) is asymptotically \(\max\{D(G),\Gamma(G)\}\). The latter is, by a theorem of \textit{J. Edmonds} [J. Res. Nat. Bur.
openaire   +2 more sources

Recent Advances on Thermochromic Inks for Security Applications

Advanced Materials Technologies, EarlyView.
Thermochromic security inks have garnered interest in recent years as security elements for authentication, information encryption, and anti‐counterfeiting. This review outlines different types of thermochromic materials, how they have been developed as functional inks, and how advancements in property enhancement, sustainability, and printing ...
Duarte B. Oliveira, Andreia Araújo, Elvira Fortunato, Rodrigo Martins, Marta C. Corvo, Emanuel Carlos   +5 more
wiley   +1 more source

Upper Bounds for the Strong Chromatic Index of Halin Graphs

Discussiones Mathematicae Graph Theory, 2018
The strong chromatic index of a graph G, denoted by χ′s(G), is the minimum number of vertex induced matchings needed to partition the edge set of G. Let T be a tree without vertices of degree 2 and have at least one vertex of degree greater than 2.
Hu Ziyu, Lih Ko-Wei, Liu Daphne Der-Fen
doaj   +1 more source

Responsive Visible‐Wavelength Metasurfaces from Porous Silicon Based on Fano Guided‐Mode Resonance

Advanced Optical Materials, EarlyView.
The article introduces mesoporous silicon metasurfaces (pSi‐MS) supporting Fano guided‐mode resonances in the visible regime. By combining top‐down lithographic patterning of 2D gratings with bottom‐up electrochemical porosification, the approach realizes a new class of responsive metasurfaces, enabling highly sensitive and portable platforms for small
Tomoshree Dash, Saddam Gafsi, Estevao Marques Dos Santos, Ivan Kravchenko, Judson D. Ryckman   +4 more
wiley   +1 more source

Engineered Optical Fibers for Deep‐Tissue Applications

Advanced Optical Materials, EarlyView.
This review establishes a foundational framework for designing optical fibers for deep‐tissue medicine. It systematically links material innovations like polymers and hydrogels with structural paradigms to enable state‐of‐the‐art diagnostics, including endoscopy and biosensing, and targeted therapeutics, guiding future clinical translation.
Yuzhen Li, Siyang Zheng, Wenzhao Li, Kai Chen, Tianting Zhong, Chi Man Woo, Weiran Pang, Chuqi Yuan, Xiaozhou Xiao, Xianguang Yang, Long Jin, Xiang Qian, Qiyao Tan, Changyuan Yu, Liwei Liu, Junle Qu, Puxiang Lai   +16 more
wiley   +1 more source

Characterization and Optimization of Field of View in a Holographic Waveguide Display

IEEE Photonics Journal, 2017
The paper presents the characterization of the field of view (FOV) in a holographic waveguide display (HWD) with a broadband spectrum image source. The influences of parameters such as grating slanted angle of volume holographic grating (VHG), grating ...
Zhongwen Shen, Yuning Zhang, Yishi Weng, Xiaohua Li   +3 more
doaj   +1 more source

The List Edge Coloring and List Total Coloring of Planar Graphs with Maximum Degree at Least 7

Discussiones Mathematicae Graph Theory, 2020
A graph G is edge k-choosable (respectively, total k-choosable) if, whenever we are given a list L(x) of colors with |L(x)| = k for each x ∈ E(G) (x ∈ E(G) ∪ V (G)), we can choose a color from L(x) for each element x such that no two adjacent (or ...
Sun Lin, Wu Jianliang, Wang Bing, Liu Bin   +3 more
doaj   +1 more source