International Conference on Applications of Radiation Science and Technology

Biopolymer-Silver Nanoparticle as a CIELAB Colour Space Dosimeter

27 Apr 2017, 14:15

2h

IAEA Board Room B/M1 (IAEA Headquarters)

Poster IRRADIATION FACILITIES P-A2

Speaker

Mr Thananchai Piroonpan (Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University)

Description

A new purpose of silver nanoparticles (AgNPs) in chitosan (CS) biopolymer is proposed as a radiation dosimeter for application in the dose range of food irradiation. The biopolymer-AgNPs are simply prepared from AgNO$_{3}$ precursor and CS (DD ${=} 90$%, $M_v = 580$ kDa) aqueous solution. The optimum formula of biopolymer-AgNPs dosimeter was studied. A series of the prepared biopolymer-AgNPs dosimeter relatively response by colour changing to the electron beam irradiation doses. With this system, the colours were measured in a CIELAB colour space using a colourimeter. The biopolymer-AgNPs dosimeter is exposed to various irradiation doses ranging from $0$ to $10$ kGy. Based on CIELAB colour space, the colour of biopolymer-AgNPs dosimeter is changed from white to yellow and dark brown by irradiation. The numerically measured colour is presented in the CIELAB colour difference ($\Delta$E$_{ab}$). The relationship of dose and colour showed that $\Delta$E$_{ab}$ linearly increased with irradiation dose. The colour change is due to the particle size of biopolymer-AgNPs dosimeter. The colours from the developed biopolymer-AgNPs dosimeter can be applied using general purpose scanner and the measured colours were then calculated to their corresponding radiation doses. The biopolymer-AgNPs dosimeter is expected to be a simple, economical, effective and alternative device as the food irradiation dosimeter.