Lietuvos mokslų akademijos Leidybos skyrius
    Tel. +370 5 2626851, +370 5 2613620 El. paštas leidyba@lma.lt
Chemija / Chemistry

ISSN 0235-7216
ISSN 2424-4538 (online)

2016 m. Nr. 2

Relation between spectral and spatial properties of gold nanoclusters modified by the morpholine ligand
Akvilė ŠLĖKTAITĖ, Reda KUBILIŪTĖ, Deividas SABONIS, Ričardas ROTOMSKIS

Recently, gold nanoparticles have received the most attention due to the features and possible applications of their size dependent surface plasmon resonance, which disappears for nanoparticles less than 2 nm in size, that are called gold nanoclusters. Gold nanoclusters, composed of only several to tens of atoms, exhibit molecule-like electronic transitions and size-dependent photoluminescence. This effect offers many possible applications including biological and biochemical sensors and fluorescent bioimaging. Here we report the study of the spectral properties of gold nanoclusters synthesized using a 2-(N-morpholino) ethanesulfonic acid as a capping agent, and their relation to the spatial characteristics of these clusters. We investigated spectral changes of nanoclusters under varying pH value and sample preparation methods and observed the highest photoluminescence intensity at pH 6.3. According to theoretical models we estimated that these particles are composed of 8 atoms, which form a three-dimensional pyramidal structure (C2V). At pH 4.9–5.8 additional plasmonic gold nanoparticles were generated with the calculated size of about 20 nm.

: Keywords: MES capped fluorescent nanoparticles, plasmon resonance, gold nanoclusters, spectral properties, pH

Issues:

2017 - Vol.28
No. 1, No. 2, No. 3, No. 4

2016 - Vol.27
No. 1, No. 2, No. 3, No. 4

2015 - Vol.26
No. 1, No. 2, No. 3, No. 4

2014 - Vol.25
No. 1, No. 2, No. 3, No. 4

2013 - Vol.24
No. 1, No. 2, No. 3, No. 4

2012 - Vol.23
No. 1, No. 2, No. 3, No. 4

2011 - Vol.22
No. 1, No. 2, No. 3, No. 4

2010 - Vol.21
No. 1, No. 2-4

2009 - Vol.20
No. 1, No. 2, No. 3, No. 4

2008 - Vol.19
No. 1, No. 2, No. 3-4

2007 - Vol.18
No. 1, No. 2, No. 3, No. 4

2006 - Vol.17
No. 1, No. 2-3, No. 4

2005 - Vol.16
No. 1, No. 2, No. 3-4

2004 - Vol.15
No. 1, No. 2, No. 3, No. 4

2003 - Vol.14
No. 1, No. 2, No. 3, No. 4

2002 - Vol.13
No. 1, No. 2, No. 3, No. 4

2001 - Vol.12
No. 1, No. 2, No. 3, No. 4