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Dr Zeljka Krpetic's Outputs (35)

Importance of Nanoparticle Size in Colorimetric and SERS-Based Multimodal Trace Detection of Ni(II) Ions with Functional Gold Nanoparticles (2012)
Journal Article
Krpetic, Z., Guerrini, L., Larmour, I., Reglinski, J., Faulds, K., & Graham, D. (2012). Importance of Nanoparticle Size in Colorimetric and SERS-Based Multimodal Trace Detection of Ni(II) Ions with Functional Gold Nanoparticles. Small, 8(5), 707-714. https://doi.org/10.1002/smll.201101980

Colorimetric detection of analytes using gold nanoparticles along with surface-enhanced Raman spectroscopy (SERS) are areas of intense research activity since they both offer sensing of very low concentrations of target species. Multimodal detection... Read More about Importance of Nanoparticle Size in Colorimetric and SERS-Based Multimodal Trace Detection of Ni(II) Ions with Functional Gold Nanoparticles.

Mercaptocarborane-capped gold nanoparticles : electron pools and ion traps with switchable hydrophilicity (2012)
Journal Article

A simple single-phase method for the preparation of ca. 2 nm gold nanoparticles capped with mercaptocarborane ligands is introduced. The resultant monolayer protected clusters (MPCs) exhibit redox-dependent solubility and readily phase transfer betwe... Read More about Mercaptocarborane-capped gold nanoparticles : electron pools and ion traps with switchable hydrophilicity.

Intracellular mapping with SERS-encoded gold nanostars (2011)
Journal Article
Rodríguez-Lorenzo, L., Krpetic, Z., Barbosa, S., Alvarez-Puebla, R., Liz-Marzán, L., Prior, I., & Brust, M. (2011). Intracellular mapping with SERS-encoded gold nanostars. Integrative Biology, 3(9), 922-926. https://doi.org/10.1039/C1IB00029B

Here we report on the design, synthesis and application of small, highly bright, star-shaped SERS encoded single nanoparticles with the ability of providing an optical signal upon excitation with near infrared light. These particles are colloidally s... Read More about Intracellular mapping with SERS-encoded gold nanostars.

Acrylate-facilitated cellular uptake of gold nanoparticles (2011)
Journal Article
Krpetic, Z., Nativo, P., Prior, I., & Brust, M. (2011). Acrylate-facilitated cellular uptake of gold nanoparticles. Small, 7(14), 1982-1986. https://doi.org/10.1002/smll.201100462

Uptake of PEGylated gold nanoparticles by HeLa cells in the presence of acrylate is described. Nanoparticles that are usually not taken up readily cross the plasma membrane into the cytosol in the presence of acrylate. In addition, a method is descri... Read More about Acrylate-facilitated cellular uptake of gold nanoparticles.

Negotiation of intracellular membrane barriers by TAT-Modified gold nanoparticles (2011)
Journal Article
Krpeticc, Z., Saleemi, S., Prior, I., Sée, V., Qureshi, R., & Brust, M. (2011). Negotiation of intracellular membrane barriers by TAT-Modified gold nanoparticles. ACS nano, 5(6), 5195-5201. https://doi.org/10.1021/nn201369k

This paper contributes to the debate on how nanosized objects negotiate membrane barriers inside biological cells. The uptake of peptide-modified gold nanoparticles by HeLa cells has been quantified using atomic emission spectroscopy. The TAT peptide... Read More about Negotiation of intracellular membrane barriers by TAT-Modified gold nanoparticles.

Inflicting controlled nonthermal damage to subcellular structures by laser-activated gold nanoparticles (2010)
Journal Article
Krpetic, Z., Nativo, P., Sée, V., Prior, I., Brust, M., & Volk, M. (2010). Inflicting controlled nonthermal damage to subcellular structures by laser-activated gold nanoparticles. Nano Letters, 10(11), 4549-4554. https://doi.org/10.1021/nl103142t

We show that low-intensity laser irradiation of cancer cells containing endosomal gold nanoparticles leads to endosome rupture and escape of the nanoparticles into the cytosol without affecting the cells’ viability. The low light intensity of our exp... Read More about Inflicting controlled nonthermal damage to subcellular structures by laser-activated gold nanoparticles.

Phagocytosis of biocompatible gold nanoparticles (2010)
Journal Article
Krpeticc, Z., Porta, F., Caneva, E., Dal Santo, V., & Scarì, G. (2010). Phagocytosis of biocompatible gold nanoparticles. Langmuir, 26(18), 14799-14805. https://doi.org/10.1021/la102758f

We report the evidence for the cellular uptake of gold nanoparticles via the phagocytosis mechanism in murine macrophage cells strongly supported by TEM and optical microscopy. Nanoparticles were prepared using several biocompatible molecules of choi... Read More about Phagocytosis of biocompatible gold nanoparticles.

Gold nanoparticles prepared using cape aloe active components (2009)
Journal Article
Krpetic, Z., Scarì, G., Caneva, E., Speranza, G., & Porta, F. (2009). Gold nanoparticles prepared using cape aloe active components. Langmuir, 25(13), 7217-7221. https://doi.org/10.1021/la9009674

A novel use of two components of Cape aloe, aloin A and aloesin, acting as stabilizers in the preparation of gold and silver nanoparticles, is reported. Stable water-soluble particles of different size and shape are prepared by varying the reaction c... Read More about Gold nanoparticles prepared using cape aloe active components.

A multidentate peptide for stabilization and facile bioconjugation of gold nanoparticles (2009)
Journal Article
Krpetic, Z., Nativo, P., Porta, F., & Brust, M. (2009). A multidentate peptide for stabilization and facile bioconjugation of gold nanoparticles. Bioconjugate Chemistry, 20(3), 619-624. https://doi.org/10.1021/bc8003028

Gold nanoparticles of two different sizes stabilized by a 15-mer peptide ligand specifically designed for this purpose have been prepared in aqueous solution and characterized by UV−vis spectroscopy and TEM. The presence of the ligand and its binding... Read More about A multidentate peptide for stabilization and facile bioconjugation of gold nanoparticles.

Electroreductions on silver-based electrocatalysts : the use of Ag Nanoparticles for CHCl3to CH4Conversion (2009)
Journal Article
Rondinini, S., Aricci, G., Krpetic, Z., Locatelli, C., Minguzzi, A., Porta, F., & Vertova, A. (2009). Electroreductions on silver-based electrocatalysts : the use of Ag Nanoparticles for CHCl3to CH4Conversion. Fuel Cells, 9(3), 253-263. https://doi.org/10.1002/fuce.200800083

A preliminary investigation on a new class on electrocatalytic
materials for the electroreduction of organic halides is
presented and discussed. The electrocatalysts are based on
silver nanoparticles (Ag_NP), ad hoc synthesised by chemical
reduct... Read More about Electroreductions on silver-based electrocatalysts : the use of Ag Nanoparticles for CHCl3to CH4Conversion.

Gold-ligand interaction studies of water-soluble aminoalcohol capped gold nanoparticles by NMR (2008)
Journal Article
Porta, F., Krpetic, Z., Prati, L., Gaiassi, A., & Scarì, G. (2008). Gold-ligand interaction studies of water-soluble aminoalcohol capped gold nanoparticles by NMR. Langmuir, 24(14), 7061-7064. https://doi.org/10.1021/la8008392

Novel reproducible preparations of gold nanoparticles capped by aminoalcohols have been set up by reduction of HAuCl4 with NaBH4 in aqueous solution. The characterization of Au@aminoalcohol nanoparticles performed by 1H NMR, ATR-FTIR, UV−vis spectros... Read More about Gold-ligand interaction studies of water-soluble aminoalcohol capped gold nanoparticles by NMR.

Gold nanoparticles capped by peptides (2007)
Journal Article
Porta, F., Speranza, G., Krpetic, Z., Dal Santo, V., Francescato, P., & Scarì, G. (2007). Gold nanoparticles capped by peptides. Materials Science and Engineering: B, 140(3), 187-194. https://doi.org/10.1016/j.mseb.2007.03.019

Two dipeptides (GK and GC) and two 15-aminoacid peptides (GK15 and GC15) were used as capping agents in the preparation of monolayer-protected gold nanoparticles (MPCs). They were characterized by TEM microscopy, UV–vis, NMR and IR spectroscopy.

Selective entrance of gold nanoparticles into cancer cells (2006)
Journal Article
Krpetic, Z., Porta, F., & Scarì, G. (2006). Selective entrance of gold nanoparticles into cancer cells. Gold Bulletin, 39(2), 66-68. https://doi.org/10.1007/BF03215278

We report that Au(0) nanoparticles, stabilized by 5-aminovaleric acid, selectively penetrate into K562 cancer cells in a short time. These experiments were carried out in order to verify the specific recognition of gold sol by abnormal cells. The obs... Read More about Selective entrance of gold nanoparticles into cancer cells.

Single-phase bimetallic system for the selective oxidation of glycerol to glycerate
Journal Article
Prati, L., Villa, A., Su, D., Wang, D., Krpetic, Z., & Porta, F. Single-phase bimetallic system for the selective oxidation of glycerol to glycerate. Studies in surface science and catalysis, 162, 553-560. https://doi.org/10.1016/S0167-2991%2806%2980952-3

Au-Pd bimetallic systems on carbon, (Pd@Au)/C (1) and Pd@Au/C (2), have been prepared by using metallic colloidal solutions, following two different procedures. The total metal loading was 1%wt and Au/Pd molar ratio 6/4. The catalytic activities have... Read More about Single-phase bimetallic system for the selective oxidation of glycerol to glycerate.