Nanometer‐Sized Copper Sulfide Hollow Spheres with Strong Optical‐Limiting Properties

Abstract

CuS semiconductor nanometer‐sized hollow spheres are successfully synthesized by using a soft‐template method. A possible growth mechanism is proposed. The linear optical property of the CuS hollow spheres is examined by means of photoluminescence spectroscopy at room temperature. The optical‐limiting (OL) property of these nanostructures is characterized by using a nanosecond Q‐switched YAG laser and an optical parametric oscillator pumped with Surelite‐III. A strong OL response is detected for the CuS hollow spheres in both visible and near infrared (NIR) spectral ranges, which makes these promising materials for applications such as the protection of human eyes or as optical sensors for high‐power laser irradiation. The OL mechanism of the CuS hollow‐sphere nanostructure may be the combination of free‐carrier absorption (FCA) and nonlinear scattering.

Hollow Micro‐/Nanostructures: Synthesis and Applications

“…[178,179] After the silica shell is formed by the hydrolysis and condensation of TEOS, the liquid PDMS cores can be easily removed by solvent extraction. [180] In addition to sol-gel processes, many other synthetic approaches, such as hydrothermal methods [158] and g-irradiation, [181][182][183][184] have been employed in combination with emulsion templating to synthesize hollow particles of various crystalline materials, including metals, [185,186] oxides [187] and sulfides, [157,188,189] and inorganic/polymer composites. [183,184] Bao et al synthesized Ni hollow spheres (300-450 nm) using NiSO 4 and NaH 2 PO 2 as precursor and reducing agent respectively.…”

Nanopartikuläre Funktionsmaterialien

“…Öl-phase enthaltende Micelle, die als flüssiges Templat dient, aufgebaut werden (Abbildung 35). [275] Größe und Wandstärke der Hohlkugel können dabei unmittelbar während der Synthese über die Micelleneigenschaften eingestellt werden. Ferner können unterschiedlichste Substanzen (z.…”

Hierarchical Hollow Co9S8 Microspheres: Solvothermal Synthesis, Magnetic, Electrochemical, and Electrocatalytic Properties

“…Semiconductor transition-metal chalcogenides are of great interest because of their potential wide-ranging applications in fields such as optical sensors, [13] optoelectronic devices, [14] magnetic devices, [15] and catalysts. [16] Among a variety of transition metal sulfides, Co 9 S 8 is an effective hydro-desulfurization catalyst, [17] and is found to have the highest catalytic activity for the oxygen reduction reaction (ORR) in acidic solution.…”