Unstable Reshaping of Gold Nanorods Prepared by a Wet Chemical Method in the Presence of Silver Nitrate

Authors: Iqbal, Muhammad; Tae, Giyoong

Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 11, November 2006 , pp. 3355-3359(5)

Publisher: American Scientific Publishers

Key:

- Free Content

- New Content

- Subscribed Content

- Free Trial Content

Abstract:

We characterized the stability of the gold nanorods synthesized by means of a seed mediated growth approach in the presence of AgNO₃, which consists of synthesis of small diameter seed particles (∼4 nm) and subsequent growth of these nanoparticles into nanorods by addition to gold salt solution containing cetyltrimethylammonium bromide (CTAB) in the presence of ascorbic acid. The presence of silver nitrate significantly enhanced the nanorod synthesis as previously reported. However, the synthesized nanorods were unstable and reshaped in aqueous environment; the continuous blue-shift of the 2nd plasmon bands was monitored and the changes in the nanorod morphologies were also observed by electron microscopy with increasing storage time. This reshaping was observed at wide CTAB concentration range regardless of the removal of the unreacted gold or silver ions.

Keywords: SEED MEDIATED GROWTH; SOFT TEMPLATE; PLASMON BANDS; NAIL-SHAPED NANORODS

Document Type: Research article

DOI: 10.1166/jnn.2006.009

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$213.00 plus tax Refund Policy