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Becker, Richard
Publications (2 of 2) Show all publications
Becker, R., Liedberg, B. & Käll, P.-O. (2010). CTAB promoted synthesis of Au nanorods - Temperature effects and stability consideration. Journal of Colloid and Interface Science, 343(1), 25-30
Open this publication in new window or tab >>CTAB promoted synthesis of Au nanorods - Temperature effects and stability consideration
2010 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 343, no 1, p. 25-30Article in journal (Refereed) Published
Abstract [en]

A systematic study is performed of the influence of surfactant and temperature on the aspect ratio and monodispersity of Au nanorods, synthesized by a seed-mediated growth technique in water using cetyltrimethylammonium bromide (CTAB) as surfactant. The changes in aspect ratio with temperature show an "anomalous" behaviour, where the aspect ratio first decreases with increasing temperature, reaching a minimum at about 55oC, and after that increases again reaching a maximum at about 80oC. A physical explanation of the observed behaviour is proposed. It has also been studied how the CTAB concentration in the cleansing water used in the post-synthesis treatment of the samples affected the stability of the gold suspension. It was found that without the presence of a surfactant such as CTAB in the washing medium, only very few centrifugations can be carried out without considerable loss of product. Characterization of prepared samples was performed with UV-Vis and TEM.

Keywords
Aspect ratio; CTAB; Gold; Nanorods; Stability; Synthesis
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-53753 (URN)10.1016/j.jcis.2009.10.075 (DOI)000274548900004 ()
Available from: 2010-02-02 Created: 2010-02-02 Last updated: 2017-12-12
Becker, R., Söderlind, F., Liedberg, B. & Käll, P.-O. (2010). Synthesis of silver nanowires in aqueous solutions. Materials letters (General ed.), 64(8), 956-958
Open this publication in new window or tab >>Synthesis of silver nanowires in aqueous solutions
2010 (English)In: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, Vol. 64, no 8, p. 956-958Article in journal (Refereed) Published
Abstract [en]

Silver nanowires with a diameter of 30 nm and typical lengths of 5–10 μm have been synthesized in an aqueous medium. To initiate the reaction, citrate ions were used, and during the reaction the aromatic organicmolecules polymerize forming “straight” chain surfactants which support the formation of nanowires. Characterization by TEM and HRETM revealed the nanowires to be highly crystalline with a growth along the [110] direction.

Keywords
Synthesis; Silver; Nanomaterials; HRTEM; Surfactant
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-54176 (URN)10.1016/j.matlet.2010.01.072 (DOI)000276138400020 ()
Available from: 2010-03-01 Created: 2010-03-01 Last updated: 2017-12-12
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