Results 121 to 130 of about 27,939 (295)

Fluorescence Tuning of Carbon Dots from Red to Blue via UV‐Induced Photochemical Etching

Advanced Science, EarlyView.
A UV‐driven photochemical process enables continuous color evolution of carbon dots from red to blue using a single irradiation parameter. Progressive photoetching restructures graphitic domains and surface states, allowing full visible‐spectrum emission control.
Nanzhi Zheng, Yuchen Yang, Jingwei Xu, Jincheng Gan, Yinuo An, Xinyu Li, Guohua Chen   +6 more
wiley   +1 more source

Unidirectional Evaporation‐Induced Tunable and Continuous Gradient Composite Structure for Absorption‐Dominant Electromagnetic Interference Shielding

Advanced Science, EarlyView.
A continuous conductivity gradient is formed in a porous MXene/melamine foam via directional evaporation, thereby improving impedance matching and enhancing electromagnetic attenuation. The resulting monolithic composite delivers absorption‐dominant EMI shielding with ultralow reflection, offering a simple route toward lightweight EMI shielding ...
Dawei Zhang, Yan Zhang, Baosong Li, Abdallah Kamal, Haider Butt, Kin Liao, Lianxi Zheng   +6 more
wiley   +1 more source

Local chromatic number of quadrangulations of surfaces

, 2013
The local chromatic number of a graph G, as introduced in [4], is the minimum integer k such that G admits a proper coloring (with an arbitrary number of colors) in which the neighborhood of each vertex uses less than k colors.
Tardos, Gábor, Simonyi, Gábor, Gábor Simonyi, Mohar, B., Gábor Tardos, Bojan Mohar   +5 more
core   +1 more source

Note on $k$-chromatic graphs [PDF]

, 1994
summary:In this paper we characterize $k$-chromatic graphs without isolated vertices and connected $k$-chromatic graphs having a minimal number of ...
Marcu, Dănuţ
core   +1 more source

Asteroidal Chromatic Number of a Graph

Electronic Notes in Discrete Mathematics, 2003
Summary: Let \(G=(V,E)\) be a connected graph. A subset \(A\) of \(V\) is called an asteroidal set if for any three vertices \(u,v,w\) in \(A\), there exists a \(u\)-\(v\) path in \(G\) that avoids the neighbourhood of \(w\). The asteroidal chromatic number \(\chi_a\) of \(G\) is the minimum order of a partition of \(V\) into asteroidal sets.
S. Arumugam 0001, Hepzibai Jeyakumar
openaire   +2 more sources

Surface Fermi Level Modulation of Photoanode by Optimized Conducting Nanoparticle Heterointerfaces for Enhanced Photoelectrochemical Water Splitting

Advanced Science, EarlyView.
Optimizing the heterointerface coverage of the conducting Ni2P nanoparticles on the surface of BVO photoanode manipulates the surface Fermi‐level modulation, which significantly enhances photoelectrochemical oxygen evolution reaction. Our multiscale simulations and experimental results reveal that an optimal Ni2P coverage of 9.4% pins the surface Fermi
Phuong Thi Pham, Seulgi Ji, Unbeom Baeck, Yuankai Li, Duong Nguyen Nguyen, Won Tae Hong, Yang You, John Moraros, Kyoungsuk Jin, Jun Young Lee, Chan‐Hwa Chung, Tae‐Hoon Kim, Jongwook Park, Heechae Choi, Jung Kyu Kim   +14 more
wiley   +1 more source

Bounds for the (m,n)-mixed chromatic number and the oriented chromatic number

, 2013
International audienceWe give new bounds for the (m,n)-mixed chromatic number and the oriented chromatic number of ...
Sopena, Eric, Raspaud, André, Klostermeyer, William F., Macgillivray, Gary   +3 more
core   +2 more sources

Matlab algorithms for traffic light assignment using fuzzy graph, fuzzy chromatic number, and fuzzy inference system. [PDF]

MethodsX, 2020
Rosyida I, Nurhaida, Narendra A, Widodo.
europepmc   +1 more source

The Study of Adaptable Chromatic Number of Graphs

, 2011
計畫編號：NSC99-2115-M032-003研究期間：201008~201107研究經費：297,000一個圖型(或超圖)的著色是適合對給定的邊著色，如果沒有邊和他的兩個端點著同色。ㄧ個圖的適合的著色數是指最小的使得對任意使用個顏色的邊著色都有一個使用相同個顏色的適合的點著色。 GGkkk 過去有關適合著色數的討論，零散的出現在各不同的問題上。有許多結果在各個不同的地方被證明。讓我們對這樣的問題感到興趣，而且這問題和原始的著色定義有很大的關連，所以可以將這問題和原始著色作一些比較 ...
潘志實
core  

Tailoring Multifunctional Carbon Dots via Precursor Stoichiometry: Switching Between Solid‐State Fluorescence and Broadband Absorption Through Aggregation Control

Advanced Science, EarlyView.
Precursor stoichiometry programs the surface chemistry of carbon dots, directing their self‐assembly into distinct aggregation modes. Aldehyde‐enriched surfaces form ordered, hydrogen‐bonded assemblies that enable bright red solid‐state fluorescence, whereas amine‐rich surfaces promote compact π–π stacked aggregates with broadband visible‐light ...
Gaixia Yang, Hao Sun, Defa Hou, Fulin Yang, Yuan Zou, Bei Zhou, Lanxiang Liu, Xu Lin, Guanben Du   +8 more
wiley   +1 more source