Up-conversion luminescent materials generally have low toxicity, narrow emission bands, long fluorescence lifetimes, large anti-Stokes shifts, large light penetration depths, no background ...
Abstract Robust anti-counterfeiting techniques aim for easy identification while remaining difficult to forge, especially for high-value items such as currency and passports. ... These images encompassed all possible variations in imaging equipment, imaging conditions, user habits, and other factors that could potentially occur under actual …
Rare earth (RE 3+ = Y 3+ and Nd 3+) alkali (M + = Na + or Li +) tetrafluoride nanocrystals adopt various morphologies and crystal structures depending on the M + –RE 3+ size compatibility and Nd 3+ concentration. This in turn affects the downconversion NIR luminescence and photothermal properties of the nanocrystals. For NaOH precursor, …
Printed smart devices for anti-counterfeiting allowing ...
In this work, we prepared micron NaYTiO 4: Bi/Er (NYT: Bi/Er) phosphors with integrating up-conversion (UC) photoluminescence, down-shifting (DS) emission, phosphorescence …
Rare earth (RE3+ = Y3+ and Nd3+) alkali (M+ = Na+ or Li+) tetrafluoride nanocrystals adopt various morphologies and crystal structures depending on the M+–RE3+ size compatibility and Nd3+ concentration. This in turn affects the downconversion NIR luminescence and photothermal properties of the nanocrystals.
Lanthanide-doped upconversion nanomaterials are emerging as promising candidates in optoelectronics, volumetric display, anti-counterfeiting as well as biological imaging and therapy. Typical ...
Traditional fluorescent anti-counterfeiting materials generally exhibit unicolor display and suffer greatly from substitution, thus leading to a poor anti-counterfeiting effect. In this work, unseen but significant enhanced blue down-conversion emission from oleic acid-stabilized lanthanide-doped fluoride nanocrystals is first present …
Printed smart devices for anti-counterfeiting allowing ...
DOI: 10.1166/SAM.2017.3252 Corpus ID: 105393435 Branched NaYF4:Yb, Er Up-Conversion Phosphors with Luminescent Properties for Anti-Counterfeiting Application @article{Tan2017BranchedNE, title={Branched NaYF4:Yb, Er Up-Conversion Phosphors with Luminescent Properties for Anti-Counterfeiting Application}, author={Haihu Tan …
The development of multimode excited up-conversion (UC) luminescent materials is of great significance for information multi-encryption and anti-counterfeiting technology upgrade. In this work, SrGd 2 O 4 :Yb 3+, Er 3+ phosphors were synthesized by solid-state reaction method.
An ideal anti-counterfeiting technique has to be inexpensive, mass-producible, nondestructive, unclonable and convenient for authentication. Although many anti-counterfeiting technologies have ...
Development of advanced luminescent nanomaterials and technologies is of great significance for anti-counterfeiting applications in global economy, security, and human health, but has proved to be a great challenge. ... Design of novel lanthanide-doped core-shell nanocrystals with dual up-conversion and down-conversion luminescence for …
What Are Anti-Counterfeiting Solutions?
Anti-Counterfeit - Anti-Counterfeit - Canon Philippines. Anti-Counterfeit; Anti-Counterfeit; Canon''s Fight Against Counterfeiting. ... Canon inkjet cartridges, ink tanks, toner and toner cartridges can create a risk of, among other things, poor equipment performance, including low toner/ink yield, inferior print quality and toner / ink ...
AMA Style Chen Z, Zhu H, Qian J, Li Z, Hu X, Guo Y, Fu Y, Zhu H, Nai W, Yang Z, et al. Rare Earth Ion Doped Luminescent Materials: A Review of Up/Down Conversion Luminescent Mechanism, Synthesis, and Anti-Counterfeiting Application.
An consortium-chain-based tracking and anti-counterfeiting system is designed in this paper to provide a transparent and shared database among equipment manufacturer, sales company and consumers. During the COVID-19 pandemic, business crimes such as piracy and forcing up price of emergency medical equipment like masks …
Photochromism and photoluminescence are two interesting optical phenomena, and their combination in a single material can present some novel applications as multiple anti-counterfeiting and optical memory devices. However, a challenge exists in the exploitation of materials with both photochromism and photoluminescence upon …
DOI: 10.1166/SAM.2017.3252 Corpus ID: 105393435; Branched NaYF4:Yb, Er Up-Conversion Phosphors with Luminescent Properties for Anti-Counterfeiting Application @article{Tan2017BranchedNE, title={Branched NaYF4:Yb, Er Up-Conversion Phosphors with Luminescent Properties for Anti-Counterfeiting Application}, author={Haihu Tan …
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