“…Although there are many types of formaldehyde detection methods, including piezoelectric sensors [9], electrochemical biosensors [10], quartz crystal microbalance [11,12], Raman spectroscopy [13], gas chromatography [14,15], liquid chromatography [16,17], X-ray diffraction (XRD), transmission electron microscopy (TEM) [18] and biosensor methods [19][20][21]. Novel sensor technologies are needed to enable real time, in situ detection of formaldehyde in a compact and reusable manner [22,23]. Due to simplicity, high sensitivity, and instantaneous response [24], rapid progress has been made in the development of fluorescent probes for metal ions, biomolecules and anions.…”