Nanjing Tech University

Jinling Haiguan Technical Center

Jiangsu Yangtze Testing and Certification Co., Ltd.

Guosong Chen

Ying Hong

Xiaohua Lu

Chang Liu

Wei An

Jiansong Chen

Yuanyuan Zhu

Ling Gao

Jinling Wang

Jing Fang

Xiaochen Dong

Rong Gao

Xiaoyun He

Dandan Lv

Weijian Shen

Jikui Wang

Meihua Tang

Zhiyi Zhang

Concealed mark preparation with core-shell luminosphores for customs security check system and application thereof, to address that infrared luminescent materials have not been used in senseless customs clearance field, absorption cross sections of infrared luminescent materials currently available are not big enough, and upconversion luminescence intensity thereof is low, consequently, the luminescent marks are not clear enough to recognize marked abnormal luggage, and provide a following solution: step 1: preparing TiQ; step 2: preparing Ag@TiOcomposite nanoparticles; step 3: preparing Ag@TiQ@NaYF:Yb, Erluminescent nanoparticles; step 4: making concealed luggage marks. Ag@TiQ@NaYF:Yb, Erluminescent nanoparticles according to the present invention has superior luminescent intensity than pure NaYF:Yb, Er, and luminescent materials prepared in this method can be disseminated in organic solution such as ethanol and methanol for use in preparing concealed marks to mark susceptible luggage and provides a research direction for senseless, intelligent and safe customs clearance.

Preparation of concealed marks with core-shell luminophores for customs security check system and application thereof

A portable rapid detection device for heavy metal ions includes a card electrode and a thin-layer flow cell, wherein a three-electrode system of the card electrode is inserted in a micro-channel of the thin-layer flow cell; and heavy metal ions are detected by using an anodic stripping voltammetry (ASV), a solution to be detected flows by the surface of a working electrode in the micro-channel, and heavy metals are enriched and stripped on the surface thereof.

Portable rapid detection device for heavy metal ions and methods of use

Growing community of inventors

Nanjing, China

Guosong Chen