TY - JOUR
T1 - Eu doped NaYF4@Er:TiO2 nanoparticles for tunable ultraviolet light based anti-counterfeiting applications
AU - Singh, Anoop
AU - Arya, Sandeep
AU - Khanuja, Manika
AU - Hafiz, Aurangzeb Khurram
AU - Datt, Ram
AU - Gupta, Vinay
AU - Khosla, Ajit
N1 - Funding Information:
The corresponding author acknowledges the Science and Engineering Research Board (SERB), India for the support (File No. EEQ/2016/000119).
Funding Information:
The corresponding author acknowledges the Science and Engineering Research Board (SERB), India for the support (File No. EEQ/2016/000119).
Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/1
Y1 - 2022/1
N2 - In this work, NaYF4:Eu@TiO2:Er nanomaterial is synthesized via sol–gel method. Various characterization techniques such as FESEM, HRTEM, XRD, EDS FTIR and XPS confirmed the successful formation of NaYF4:Eu@TiO2:Er nanoparticles. The average particle size is found to be 15 nm. Also, UV–Vis–IR and PL spectrometry verified the biluminescent properties of the synthesized material. It is then investigated as biluminescent security ink to be used for anti-counterfeiting applications. The results showed that the designed biluminescent security ink exhibits strong yellow and purple emission under 275 nm and 325 nm excitations, respectively. A written material was kept for 3 months under hot (40 °C) and humid (85%) environment and the obtained results were identical without any deterioration in their luminescence intensities even after such a prolonged time. Moreover, this written material also showed stability under the exposure of different chemical solvents (ethanol, glycerol and acetone).
AB - In this work, NaYF4:Eu@TiO2:Er nanomaterial is synthesized via sol–gel method. Various characterization techniques such as FESEM, HRTEM, XRD, EDS FTIR and XPS confirmed the successful formation of NaYF4:Eu@TiO2:Er nanoparticles. The average particle size is found to be 15 nm. Also, UV–Vis–IR and PL spectrometry verified the biluminescent properties of the synthesized material. It is then investigated as biluminescent security ink to be used for anti-counterfeiting applications. The results showed that the designed biluminescent security ink exhibits strong yellow and purple emission under 275 nm and 325 nm excitations, respectively. A written material was kept for 3 months under hot (40 °C) and humid (85%) environment and the obtained results were identical without any deterioration in their luminescence intensities even after such a prolonged time. Moreover, this written material also showed stability under the exposure of different chemical solvents (ethanol, glycerol and acetone).
UR - http://www.scopus.com/inward/record.url?scp=85077206004&partnerID=8YFLogxK
U2 - 10.1007/s00542-019-04734-3
DO - 10.1007/s00542-019-04734-3
M3 - Article
AN - SCOPUS:85077206004
SN - 0946-7076
VL - 28
SP - 295
EP - 304
JO - Microsystem Technologies
JF - Microsystem Technologies
IS - 1
ER -