Will glow invisible ink developed successfully

China Paint Online News Information:
"no trace" ink can encrypt information, but also long glow? The invisible ink that often appears in spy wars blockbusters is now a reality and more powerful. Recently, Tianjin University Materials College Seal Wei team for the first time in China prepared fluorine nitrogen double doped carbon quantum dot (FNCDs), and based on this to create a can be invisible and has self-protection ultra-long room temperature phosphorescies performance of the magic ink. The results were published online in the latest issue of Advanced Functional Materials.
according to the introduction, luminescent invisible materials, especially room temperature phosphorescent materials, because of its long luminescence life and unique single-line state - three-line state jump and other excellent features, can play a very significant encryption effect, is an important carrier of photon encryption information, widely used in the field of information security, is also one of the popular scientific research fields, with very high economic value and application prospects, and invisible ink is the field of luminescent invisible material fluorinated carbon downstream specific products.
the vast majority of room temperature phosphorescent materials based on carbon quantum dots have to be embedded in the substitut to obtain the emission of phosphorescent light at room temperature, and the product glows for only a few tens of milliseconds. The preparation of the room temperature phosphor carbon quantum dot, regardless of the substation-assisted oxygen isolation layer can achieve spontaneous phosphorescic light at room temperature, the length of time reached 1.21 seconds, external stimulation can also directly act on the exposed carbon quantum dot, conducive to the design of external stimulus response phosphorescies sensor. In the experiment, the researchers used fluorine nitrogen double doped carbon quantum dot water dispersion liquid made of ink, through ordinary commercial inkjet printer, the pre-designed complex patterns, text and other encrypted information printed on the filter paper, its drying under the ultraviolet lamp emits a strong solid blue fluorescence, remove the UV lamp will emit self-protection green phosphorus, to achieve the time and space dimensions of information double security protection.
research results, the future is expected to be applied to information record reading, anti-counterfeiting and cryo writing and other fields. At the same time, this dual-element doping technology also provides a new way of thinking for the design and application of phosphorescic invisible materials at room temperature.
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