Quantum dots are extremely tiny nanoparticles typically between 10 to 10,000 atoms (1 to 9 nanometers) in diameter; they are thus smaller than 1/10,000th the width of human hair. Quantum dots are so small that they cannot be seen under a conventional microscope. To put it simply, quantum dots are incredibly small particles with sizes on an atomic scale. However, the effects of this extreme small size cannot be ignored. Quantum dots are actually very powerful materials, and their size gives them unique abilities, including highly efficient conversion of light to nearly any colour in the visible spectrum.
The electronic characteristics of quantum dots are determined by the quantum confinement effect, in accordance with their chemical composition, size, and shape. This feature means that we can control the colour of light given off by a quantum dot just by changing its size. Generally, larger dots emit light of longer wavelengths, such as red, while smaller dots emit light of shorter wavelengths, such as green or blue. The tune of a quantum dot is the wavelength of the light that it emits; this unique property can therefore be utilized for the following applications:
TV displays and smartphone displays
Security tags, security inks, and counterfeit protection devices
Quantum dot lasers
Quantum dot transistors
Bio-imaging, biomarkers, medical display applications (cancer cell imaging, protein analysis, and cell tracking)
High-density solid-material-based memory
Quantum dot computers
Visible-light-response-type photocatalytic materials
Various types of quantum dots currently exist, but in general, they are made of semiconductor materials such as CdSe, CdS, InP, ZnS, InP/ZnS, CIS (CuInS2, CuInSe2), AgInS2 CIS/ZnS, and PbS, etc. Moreover, there are carbon, graphene, and silicon quantum dots. Fuji Pigment Co., Ltd. synthesizes and supplies all of these quantum dots. However, Cd-based quantum dots are toxic. In addition, indium is expensive and requires complete exclusion O2 and H2O, to synthesize InP. Furthermore, set up of a manufacturing facility for these quantum dots is expensive.
In this regard, Dr. Ryohei Mori at Fuji Pigment Co., Ltd. (Kawanishi City, Japan) has been diligently researching and developing a new type of quantum dots, perovskite quantum dots. The half width of their emission spectra is substantially narrower than that of InP; this property is very beneficial to the application of the dots in display materials, LED, bio-imaging. The chemical composition of perovskite quantum dots are either CsPbX3 or CH3NH3PbX3 (X= Cl, Br, I). Their quantum efficiency is 50–80 per cent and their half width is 15–39 nm. Since the half width of the dots is small, they can be utilized in displays, lasers, LED and bio-imaging. Their base solvent is either hexane or toluene. However, finding alternative solvents is a challenge that is now being addressed. Furthermore, replacing Pb (lead) with another element such as Sn is under study, despite its difficulty; this entails widening of the half width and a decrease in quantum efficiency. Moreover, Fuji Pigment is trying to coat perovskite quantum dot surface with either polymer or inorganic materials which would enhance the quantum dot resistance against water, light and heat. The Fuji Pigment Co., Ltd. is suggested to be the first company, to commercialize perovskite quantum dots in the world.
Macallan Whisky picks Izon® Technology as part of a comprehensive anti-counterfeit solution
(De La Rue Authentication Solutions)
The Edrington Group, makers of world renowned The Macallan Highland Single Malt Scotch Whisky, faced a challenge when re-filled used
bottles, intact with labels, began appearing on shelves under their brand name. This posed a serious consumer safety, as well as a global
brand issue. For a solution, they turned to Authentication Solutions for the key overt component of a comprehensive solution.
Epson builds market awareness of authentic product through implementation of layered AC tech
(De La Rue Authentication Solutions)
Epson Latin America estimated that 20% of the product in the market was counterfeit and entering the supply chain through local distributors. The existing anti-counterfeiting ink technology was compromised. Epson developed a new strategy to target unauthorized distributors in key countries and build market awareness of authentic product.
The StellaGuard™ solution leverages the benefits of a barcode and connects it with a three-dimensional visual reference that provides instantaneous authentication with copy-detect protection. StellaGuard™ is a patented and elegant solution to protect your assets, enabling trusted stakeholders, including customers, to authenticate a product using common everyday smart devices.
The smartphone: a new tool to spot fake products
The development of new smartphone technologies offers brands the opportunity to fight counterfeiting more efficiently and drive competitive differentiation by turning their products into smart assets. This paper examines the process of placing the consumer as one of the key actors against illicit trade and creating new business intelligence capabilities for brands.
Pharma Security World 2018: "Anti-counterfeiting and Brand Safety"
March 20-21, 2018 - London, UK
Global Illicit Trade Summit 2018: Out of the shadows
March 22, 2018 - Kuala Lumpur
4XScience 2018 E2E Supply Chain Serialization Benchmark Workshop
March 27-28, 2018 - Brussels, Belgium
Robert Schuman Foundation conference: Smuggling, counterfeiting and the financing of terrorism – mobilising economic stakeholders
April 11, 2018 - Brussels, Belgium
April 17-19, 2018 - New York (NY), USA
4th Global Brand Protection EU Innovation Programme (GBPIP)
April 26-27, 2018 - London, UK
IACC 2018 Annual Spring Conference
May 16-18, 2018 - Seattle (WA), USA
May 29 - June 01, 2018 - Milan, Italy
Partnership for Safe Medicines 2018 Interchange
June 07, 2018 - Washington D.C., USA
June 25-27, 2018 - London, UK
September 2018 (dates tbc) - Switzerland
Rx-360 Global Life Science Supply Chain 2018 Conference: Driving Innovative Quality Strategies
September 25-26, 2018 - Miami (FL), USA
2018 A-CAPP Center Brand Protection Strategy Summit
October 02-03, 2018 - East Lansing (MI), USA
13th Security Document Summit (SDS)
October 17-18, 2018 - Beijing, China
Anti-Counterfeit & Currency Expo (ACCE)
November 06-08, 2018 - Las Vegas (NV), USA