Stable ligand-free stellated polyhedral gold nanoparticles for sensitive plasmonic detection

Nanoscale
Rachel KeunenVladimir Kitaev

Abstract

Ligand-free stellated gold nanoparticles (AuStNPs) with well-defined octahedral (O(h)) and icosahedral (I(h)) core symmetries were prepared using hydrogen peroxide as a reducing agent. Only three reagents: gold precursor (HAuCl4), H2O2 and NaOH were required to form colloidally and chemically stable AuStNPs with a zeta-potential between -55 and -40 mV indicative of excellent charge stabilization. The size and degree of stellation of AuStNPs can be controlled by several synthetic parameters so that the localized surface plasmon resonance (LSPR) can be varied from ca. 850 nm in near-infrared (NIR) to ca. 530 nm. In particular, AuStNP size and LSPR tuning can be conveniently accomplished by iodide variation. The size distribution of AuStNPs was improved by nucleation with ascorbic acid, and the AuStNP size and degree of branching could be readily modified using arginine. AuStNPs are advantageous for SPR sensing, as it was demonstrated in the sensitive detection of not only thiols, such as ampicillin, but also iodide with the detection limit of 3.2 pM (0.4 ng L(-1)). The reported ligand-free stable AuStNPs thus should be very useful for biodiagnostics based on SPR sensing and potentially for SERS and hyperthermia therapy.

References

Jul 15, 2004·Journal of the American Chemical Society·Tapan K Sau, Catherine J Murphy
Apr 13, 2006·Nano Letters·Colleen L NehlJason H Hafner
Jul 26, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Jessica Rodríguez-FernándezLuis M Liz-Marzán
Aug 11, 2006·The Journal of Physical Chemistry. B·J KimlingA Plech
Dec 1, 2006·The Journal of Physical Chemistry. B·A S Barnard
Jan 30, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Kurtis D HartlenVladimir Kitaev
Jul 23, 2008·Nano Letters·Jill E MillstoneChad A Mirkin
Jul 10, 2009·Chemical Society Reviews·Elodie Boisselier, Didier Astruc
Nov 10, 2009·Nature Nanotechnology·Andrew M SmithShuming Nie
Jan 2, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Teng HuangLimin Qi
Jun 1, 2010·Advanced Materials·Tapan K SauJochen Feldmann
Sep 8, 2010·Chemical Society Reviews·Claire M CobleyYounan Xia
Nov 23, 2010·Angewandte Chemie·Byungkwon Lim, Younan Xia
May 12, 2011·Journal of the American Chemical Society·Matthew McEachranVladimir Kitaev
Oct 18, 2011·Journal of the American Chemical Society·Qiao ZhangYadong Yin
May 17, 2012·Accounts of Chemical Research·Zewei QuanJiye Fang
Aug 28, 2012·Journal of the American Chemical Society·Mark R LangilleChad A Mirkin
Oct 30, 2012·Nature Nanotechnology·Roberto de la Rica, Molly M Stevens
Feb 19, 2013·Advanced Materials·Qiaoqiang GanZakya H Kafafi
Sep 6, 2013·Nature·Anil DesireddyTerry P Bigioni
Feb 20, 2014·Chemical Society Reviews·Guillaume Baffou, Romain Quidant
Jun 11, 2014·ACS Applied Materials & Interfaces·Louise B WrightTiffany R Walsh
Mar 6, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Germán Plascencia-VillaMiguel José-Yacamán
May 21, 2015·Nature Materials·Suljo LinicMatthew Morabito
Jun 13, 2015·Chemical Society Reviews·Enyi YeMing-Yong Han
Aug 11, 2015·Journal of the American Chemical Society·Wenxin NiuXianmao Lu
Aug 22, 2015·Chemical Reviews·Xuan YangYounan Xia
Aug 28, 2015·Chemical Reviews·Lucas A LaneShuming Nie
Sep 7, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Pierangelo GobboMark S Workentin

❮ Previous
Next ❯

Citations

Jul 16, 2016·Chemical Communications : Chem Comm·Krysten HobbsVladimir Kitaev
Feb 13, 2018·Expert Review of Molecular Diagnostics·Andrea CsákiWolfgang Fritzsche

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.