Iron-oxide nanoparticles supported on sepiolite as a novel humidity sensor

Anisotropic reinforcement of epoxy-based nanocomposites with aligned magnetite–sepiolite hybrid nanofiller

“…The incorporation of magnetic particles on the sepiolite surface has already been reported in the literature [11][12]. Considering its high aspect ratio sepiolite fibers are good candidates as fillers to reinforce the epoxy resin, still keeping a high specific surface even after dispersion.…”

Multifunctional Porous Materials Through Ferrofluids

“…[ 7 , 13 ] The resulting materials show ferromagnetic behaviour that has been profi ted for the preparation of magnetic humidity sensors [ 7 ] and to decorate ceramic materials. [ 14 ] In the materials here reported, sepiolite does not suffer any drastic treatment, preserving its adsorbent properties, and the magnetic behaviour is superparamagnetic, i.e., it is only magnetic in the presence of a magnetic fi eld.…”

Metal Nanoparticles: Applications in Electroanalysis

“…Nonetheless, iron oxide nanoparticles have been utilized in a diverse array of sensors, primarily as humidity sensors [186][187][188]. Although these are slightly beyond the scope of traditional electroanalytical sensors, they deserve a mention.…”

“…Although these are slightly beyond the scope of traditional electroanalytical sensors, they deserve a mention. In these cases the iron oxide was immobilized either in a sol-gel [186], a polypyrrole film [187], or on sepiolite powder [188]. Subsequently, the resistance of each sensor was found to vary according to the humidity.…”

“…Among published reports, two variations of biosensor are predominant. Figure 12.2 illustrates, schematically, a biosensor in which a mediator species that is capable of catalyzing the oxidation or reduction of the products from the enzyme reaction, is first deposited onto the macro-electrode [176] Liquefied Petroleum Gas Direct Up to 25 ppm in air N/A Fe [188] Humidity Direct 5-98% N/A Fe/In [188] Ozone Direct N/A 30 ppb Fe [191] Glucose Biosensor 0.006-10 mM 3.17 mM Fe [192] Glucose Biosensor Up to 20 mM N/A Ir [205] Glucose Biosensor Up to 12 mM N/A LoD, Limit of detection. surface.…”