Controlling the oxidation state of molybdenum oxide nanoparticles prepared by ionic liquid/metal sputtering to enhance plasmon-induced charge separation

Abstract

MoOx NPs, prepared by sputtering Mo metal on a room-temperature ionic liquid (RTIL) followed by heating in air, produced anodic photocurrents with the excitation of their LSPR peak.

Monolayer hydrophilic MoS2 with strong charge trapping for atomically thin neuromorphic vision systems

“…Different from untreated MoS2, there are additional doublet peaks at 229.9 and 233 eV in Mo 3d spectrum of hydrophilic MoS2, corresponding to Mo 4+ peaks of Mo-O bonds. 41,42 Additionally, to prove the existence form of oxygen atoms in hydrophilic MoS2, the XPS spectra of O 1s peaks for both hydrophilic MoS2 and untreated MoS2 on p-type silicon substrates were analyzed. (Fig.…”

Sputtering onto liquids: a critical review

“…A wide range of elements has been successfully sputtered onto liquids to create monometallic NPs, including Au [12, 114, 115, 118, 120, 122, 125, 126, 129, 132, 134, 138, 139, 142, 143, 145 -149, 153, 167, 174 -176, 180 -183, 188, 189, 203,204,207,208,210,211,214,216,218,229-238], Ag [11,118,119,123,131,164,175,179,184,185,188,196,205,206, 217, 218, 231-233, 239], Cu [150,155,164,188,189,198,210,230,240,241], Pt [121,133,163,168,169,186,[242][243][244][245], Pd [116,212,231,242,246,247], Fe [11,161,162], In [187], Ni [135] and Mo [20...…”

“…It should be noted that, in the case of noble metals, secondary growth processes were mentioned for dispersions of Au [ 115 , 118 , 138 , 140 , 143 – 144 167 , 183 , 189 , 195 ], Ag [ 131 , 164 , 185 , 196 ], and Pt [ 185 ] NPs. When metals such as Ti [ 179 , 197 ], Cu [ 117 , 155 , 174 – 175 189 , 198 – 199 ], Fe/Al [ 200 ], Mo [ 201 ], or In [ 187 ] were sputtered , the products were oxidized due to reaction with the host liquid and/or air after removing the samples from the vacuum chamber.…”

“…2.3.4 Oxide NPs: The SoL approach can be used for the synthesis of oxide NPs [ 197 , 201 ]. In 2010, the team of Torimoto sputtered W, Mo, Nb, and Ti over ILs to synthesize highly dispersed WO x , MoO x , NbO x , and TiO x NPs [ 197 ].…”

“…In 2010, the team of Torimoto sputtered W, Mo, Nb, and Ti over ILs to synthesize highly dispersed WO x , MoO x , NbO x , and TiO x NPs [ 197 ]. Later, they focused their studies on the synthesis of MoO x NPs with a controllable oxidation state by sputtering onto ILs followed by a heat treatment [ 201 ]. In other studies, the oxidation during the storage of Cu and Ti NPs has been shown.…”