Monitoring the insertion of Pt into Cu_2−xSe nanocrystals: a combined structural and chemical approach for the analysis of new ternary phases

Abstract

The tuning of the chemical composition in nanostructures is a key aspect to control for the preparation of new multifunctional and highly performing materials. The modification of Cu2-xSe nanocrystals with...

A high activity mesoporous Pt@KIT-6 nanocomposite for selective hydrogenation of halogenated nitroarenes in a continuous-flow microreactor

“…3c) shows an interlayered spacing of 0.2258 nm, which corresponds to the d spacing of the (111) crystal planes of Pt, indicating that the loaded Pt is well crystallized in the form of nanoparticles. 48 Simultaneously, the HRTEM image (Fig. S1a †) shows a uniform distribution of Pt nanoparticles.…”

DOX-loaded silver nanotriangles and photothermal therapy exert a synergistic antibreast cancer effect via ROS/ERK1/2 signaling pathway

“…Therefore, it could be concluded that the photothermal performance of chitosan-coated AgNTs was time and concentration dependent. The light-to-heat conversion efficiency was calculated to be 50.4% (see supplementary materials for more details), which was better than god nanorods, Cu 2−x S nanocrystals and WS 2 quantum dots [31][32][33]. The UV-vis absorption spectrum of AgNTs solution had no significant change before and after 10 min 808 nm NIR irradiation (2 W cm −2 ) (figure 2(b)).…”

Thermally Promoted Cation Exchange at the Solid State in the Transmission Electron Microscope: How It Actually Works

“…In the last two decades, the need for innovative nanomaterials has dramatically increased for their versatility in a wide range of applications such as optoelectronics, photonics, and catalysis. − Therefore, several robust and effective synthetic methods have been developed for obtaining nanocrystals (NCs) with very finely tuned compositions, crystal phases, and morphologies. − Among the diverse approaches that have matured in recent years, some consist of postsynthetic transformations of preformed nanostructures, thus allowing one to obtain nanomaterials with features not directly attainable by de novo synthetic methods. − Among these postsynthetic modifications, cation exchange (CE) reactions permit the substitution of cations within a host NC lattice with those in solution, and these have proven to be a potent tool to obtain very fine control over NC compositions and phases. − Revealing the underlying mechanism is of great importance to guide the rational design of nanostructures in a precise way. Previously, several indirect yet feasible ways have been proposed by analyzing the intermediate sample generated during the CE reaction in liquid states.…”