A nanocomposite with core–shell structure for site-specific oxygen sensing: Synthesis, characterization, photophysical feature and sensing performance

A core–shell structured nanocomposite for O2 sensing was reported, using superparamagnetic ferroferric oxide as the inner core and silica molecular sieve MCM-41 as the outer shell, respectively. Composite emission decreased with increasing O2 concentrations, showing sensitivity of 11.6 and response time of 14s.