Influence of stabilising agents and pH on the size of SnO₂ nanoparticles

Abstract

SummaryAccording to recent research, the use of nanoparticles as a gas-sensitive material increases the selectivity and sensitivity and shortens the response time of a sensor. However, the synthesis of SnO2 nanoparticles presents many difficulties. The following article presents a simple and inexpensive method for the synthesis of SnO2 nanoparticles. The influence of the surfactant and polymer choice on the size of the resulting nanoparticles was investigated and a mechanism describing their interaction was proposed. It was found that stable colloids of SnO2 nanoparticles are formed in the presence of both PEI and Triton X-100 surfactants as stabilising agents. However, an additional factor essential for good stabilisation of the nanoparticles was an appropriate acidity level of the solution. Under optimal conditions, nanoparticles having an average diameter of about 10 nm are reproducibly formed.

Effect of surfactant concentration on the responsiveness of a thermoresponsive copolymer/surfactant mixture with potential application on “Smart” foams formulations

“…8a), which is close to T3. Above T3, any DTAB addition would lead to the formation of micelles probably decorated with polymer chains, with no effect on surface tension [58].…”

Extracting structural information of Au colloids at ultra-dilute concentrations: identification of growth during nanoparticle immobilization

“…The study of supported metal nanoparticles (NPs) is a cornerstone of heterogeneous catalysis; their reduced size, distribution of surface sites, and interaction with metal oxide supports afford enhanced catalytic properties as well as providing effective use of noble metals. [1][2][3][4][5] Within the various routes typically used to produce supported metal NPs, the application of solimmobilization is becoming increasingly popular; it offers a high degree of tunability through the nature of stabilising or reducing agents, [6][7][8][9][10][11] temperature of synthesis, 5,[12][13][14][15][16] solvent system, 5,16,17 or concentration of the metal precursor salt. 18 There have been many elegant studies that have assessed the inuence of these parameters, primarily relying upon advanced electron microscopy to provide structural information on the nal supported catalyst.…”

The Effect of PEI and PVP-Stabilized Gold Nanoparticles on Equine Platelets Activation: Potential Application in Equine Regenerative Medicine

“…Polymers of low molecular weight cause weaker stabilization of the nanoparticles and consequently increase their size. Polymers of high molecular weight effectively surround the nanoparticles and inhibit their agglomeration [1,26]. PEI ( = 750000) is characterized by higher average molecular weight than PVP ( = 58000).…”