Highly efficient gold nano-flower optical biosensor doped in a sol--gel/PEG matrix for the determination of a calcitonin biomarker in different serum samples

Omer, Walaa E; El-Kemary, Maged A; Elsaady, Mostafa M; Abou-Omar, Mona N; Youssef, Ahmed O; Sayqal, Ali A; Gouda, Ayman A; Moustafa, Mohamed said attia;