Quenching of Growth of ZnO Nanoparticles by Adsorption of Octanethiol

Abstract

To exploit the size dependent properties of nanoparticles, it is essential to control the particle size. We show that injection of octanethiol into suspensions of ZnO particles can be used to quench particle growth. X-ray photoelectron spectroscopy studies of the adsorption of octanethiol on ZnO single crystals indicate relatively weak adsorption of thiolate and sulfonate species dependent on the crystal orientation. These results suggest that adsorption of thiolate and sulfonate groups on ZnO particles in suspension prevent dissolution of the solid phase. Furthermore, the octanethiol is adsorbed sufficiently strongly to quench growth but can be easily removed for subsequent surface functionalization.

ZnO materials and surface tailoring for biosensing

“…The MPTS molecular attachment on the surface is proven by the identification of: (i) the silanol (102.5 eV), (ii) the thiolate (161.5 eV), and (iii) small number of molecules through the sulfonate (168 eV) groups. Strong interaction between the thiol and the zinc and/or oxygen sites is in good agreement with earlier studies of octanethiol adsorbed on ZnO single crystal surface, reported by Pesika co authors (109).…”

Synthesis, Self-assembly and Optoelectronic Properties of Monodisperse ZnO Quantum Dots

“…Sol-gel method Sol-gel method, one of the widely used wet chemical methods in synthesizing various nanomaterials [15,[73][74][75], has been used for fabrication of ZnO QDs [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. Among a number of reports on fabrication of ZnO QDs over the past decades, sol-gel method was the mostly used one due to its simplicity and cheapness.…”

“…In this method, neither expensive equipments nor harsh conditions are needed. Tokumoto et al and many other research www.intechopen.com Optoelectronic Devices and Properties 218 groups have reported synthesis ZnO QDs at low temperature, i.e., less than 80 0 C [27][28][29][30][31][32]. Meulenkamp has reported a synthetic process with the highest temperature at only room temperature to make as-prepared ZnO QDs at a size of 3-6nm [29].…”

“…By far, various kinds of synthetic approaches have been realized in fabricating such small ZnO QDs, which can be roughly divided into chemical methods and physical methods. Chemical methods involves sol-gel method [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], hydrothermal growth [41][42][43][44], thermal decomposition [45][46][47][48][49][50], electrochemical method [51][52][53][54], while physical methods involves PLA or PLD [55][56][57][58][59], MOCVD [60][61][62][63], sputtering [64][65][66], FSP method [67][68][69][70] and VPT deposition [71,72]. At present, all the methods can be divided into two parts as follow:…”

Structural, Morphological and Optical Properties of Nanoproducts of Zirconium Target Laser Ablation in Water and Aqueous SDS Solutions

“…Average size of particles for both parts of dioxide and metal zirconium reduces to 40-45 nm. The reduction of crystallite average sizes at M = 0.01 and 0.05 with regards to crystallite sizes at M = 0 is caused by the influence of surfactant -SDS, which restricts nanoparticles growth [29,30] [ 28]. At the concentration of SDS in solution up to M = 0.1 XRD patterns is observed as a spectrum of well crystallized SDS, a considerable part of which is oriented along the surface of glass plate (plane 00L), a smaller part is distributed chaotically (Fig.…”