Fig. 4: Visual comparisons of CQD fluorescence.
From: Structurally engineered colloidal quantum dot phosphor using TiO2 photonic crystal backbone
Acquired photographs of a–d the 2D PhC phosphor and e–h the reference phosphor upon excitation at specific representative wavelengths: a, e λexc = 400 nm, b, f 430 nm, c, g 462 nm (resonance), and d, h 490 nm. All the images were acquired with a long-pass filter inserted to cut off the excitation photons. The sample size, which is outlined in (c), is ~1 × 1 cm2
