PMID- 26452967 OWN - NLM STAT- MEDLINE DCOM- 20160726 LR - 20211203 IS - 1873-3573 (Electronic) IS - 0039-9140 (Linking) VI - 144 DP - 2015 Nov 1 TI - Ultra-trace electrochemical impedance determination of bovine serum albumin by a two dimensional silica network citrate-capped gold nanoparticles modified gold electrode. PG - 1336-41 LID - S0039-9140(15)30239-3 [pii] LID - 10.1016/j.talanta.2015.08.019 [doi] AB - In this work, a gold electrode (GE) was modified by coating with two dimensional silica network/citrate capped gold nanoparticles-poly(diallyldimethylammonium chloride) (GE-TDSN-CGNP-PDDA) for ultra-sensitive determination of Bovine Serum Albumin (BSA). After covalently binding of a silica network (in two-dimensional form) on the surface of a gold electrode, via twice in situ hydrolysis of 3-mercaptopropyl-tri-ethoxysilane, citrate capped gold nanoparticles (CGNP) were chemically adsorbed on the silica cage. Subsequently, PDDA was bonded to CGNP via electrostatic interaction of positively charged polymer and negatively charged stabilizer of CGNP. Analytical properties of GE-TDSN-CGNP-PDDA were studied by Electrochemical Impedance Spectroscopy (EIS). The detection limit for measured BSA was found to be 8.4x10(-13) mol L(-1) and the measuring linear concentration range of the proposed sensor was 9.9x10(-12)-1.6x10(-10) mol L(-1) of BSA. In addition, GE-TDSN-CGNP-PDDA exhibited good stability with high selectivity and was applied for determination of BSA in some samples with satisfactory results. CI - Copyright (c) 2015 Elsevier B.V. All rights reserved. FAU - Yari, Abdollah AU - Yari A AD - Department of Chemistry, Faculty of Science, Lorestan University Kamalvand, 68137-17133 Khorramabad, Iran. Electronic address: a.yari@ymail.com. FAU - Saeidikhah, Marzieh AU - Saeidikhah M AD - Department of Chemistry, Faculty of Science, Lorestan University Kamalvand, 68137-17133 Khorramabad, Iran. LA - eng PT - Journal Article DEP - 20150810 PL - Netherlands TA - Talanta JT - Talanta JID - 2984816R RN - 0 (Organosilicon Compounds) RN - 0 (Polyethylenes) RN - 0 (Quaternary Ammonium Compounds) RN - 0 (Silanes) RN - 26062-79-3 (poly-N,N-dimethyl-N,N-diallylammonium chloride) RN - 27432CM55Q (Serum Albumin, Bovine) RN - 2968PHW8QP (Citric Acid) RN - 7440-57-5 (Gold) RN - 7631-86-9 (Silicon Dioxide) RN - 8CB1M08OIW ((3-mercaptopropyl)trimethoxysilane) SB - IM MH - Animals MH - Cattle MH - Citric Acid/*chemistry MH - Electric Impedance MH - Electrochemistry MH - Electrodes MH - Gold/*chemistry MH - Hydrogen-Ion Concentration MH - Hydrolysis MH - *Limit of Detection MH - Metal Nanoparticles/*chemistry MH - Organosilicon Compounds MH - Polyethylenes/chemistry MH - Quaternary Ammonium Compounds/chemistry MH - Serum Albumin, Bovine/*analysis/chemistry MH - Silanes/chemistry MH - Silicon Dioxide/*chemistry MH - Time Factors OTO - NOTNLM OT - Albumin OT - Bovine OT - Gold electrode OT - Impedance spectroscopy OT - Nanoparticles EDAT- 2015/10/11 06:00 MHDA- 2016/07/28 06:00 CRDT- 2015/10/11 06:00 PHST- 2015/07/03 00:00 [received] PHST- 2015/08/06 00:00 [revised] PHST- 2015/08/08 00:00 [accepted] PHST- 2015/10/11 06:00 [entrez] PHST- 2015/10/11 06:00 [pubmed] PHST- 2016/07/28 06:00 [medline] AID - S0039-9140(15)30239-3 [pii] AID - 10.1016/j.talanta.2015.08.019 [doi] PST - ppublish SO - Talanta. 2015 Nov 1;144:1336-41. doi: 10.1016/j.talanta.2015.08.019. Epub 2015 Aug 10.