Electrochemical detection of single micelles through 'nano-impacts'

被引：69

作者：

Toh, H. S. ^{[1
]}

Compton, R. G. ^{[1
]}

机构：

[1] Univ Oxford, Dept Chem, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England

来源：

CHEMICAL SCIENCE | 2015年 / 6卷 / 08期

基金：

新加坡国家研究基金会; 欧洲研究理事会;

关键词：

NANOPARTICLE COLLISIONS; SILVER NANOPARTICLES; AQUEOUS-SOLUTION; ELECTRODES; VOLTAMMETRY; EXTRACTION; LIPOSOMES; BROMIDE; NICKEL; GOLD;

D O I：

10.1039/c5sc01635e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new class of 'soft' particles, micelles, is detected electrochemically via 'nano-impacts' for the first time. Short, sharp bursts of current are used to indicate the electrical contact of a single CTAB (cetyltrimethylammonium bromide) micelle with an electrode via the oxidation of the bromide content. The variation in CTAB concentration for such 'nano-impact' experiments shows that a significant number of 'spikes' are observed above the CMC (critical micelle concentration) and this is attributed to the formation of micelles. A comparison with dynamic light scattering is also reported.

引用

页码：5053 / 5058

页数：6

共 34 条

[1] A mechanistic study of the electro-oxidation of bromide in acetonitrile and the room temperature ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide at platinum electrodes [J].

Allen, GD ;

Buzzeo, MC ;

Villagrán, C ;

Hardacre, C ;

Compton, RG .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2005, 575 (02) :311-320

[2]

Amatore C, 2001, CHEM-EUR J, V7, P2206, DOI 10.1002/1521-3765(20010518)7:10<2206::AID-CHEM2206>3.0.CO

[3]

2-Y

[4]

Atkins P., 2011, Physical Chemistry for the Life Sciences

[5] Metal-halide Nanoparticle Formation: Electrolytic and Chemical Synthesis of Mercury(I) Chloride Nanoparticles [J].

Bartlett, Thomas R. ;

Batchelor-McAuley, Christopher ;

Tschulik, Kristina ;

Jurkschat, Kerstin ;

Compton, Richard G. .

CHEMELECTROCHEM, 2015, 2 (04) :522-528

[6] In situ nanoparticle sizing with zeptomole sensitivity [J].

Batchelor-McAuley, Christopher ;

Ellison, Joanna ;

Tschulik, Kristina ;

Hurst, Philip L. ;

Boldt, Regine ;

Compton, Richard G. .

ANALYST, 2015, 140 (15) :5048-5054

[7] Effects of added DOTAB on the cmc and enthalpy of micelle formation at 298.2 K for CTAB(aq) [J].

Blandamer, MJ ;

Cullis, PM ;

Soldi, LG ;

Rao, KC ;

Subha, MCS .

JOURNAL OF THERMAL ANALYSIS, 1996, 46 (06) :1583-1588

[8] Micellization and related behaviors of N-cetyl-N-ethanolyl-N,N-dimethyl and N-cetyl-N,N-diethanolyl-N-methyl ammonium bromide [J].

Chatterjee, A ;

Maiti, S ;

Sanyal, SK ;

Moulik, SP .

LANGMUIR, 2002, 18 (08) :2998-3004

[9] Investigation of Single-Drug-Encapsulating Liposomes using the Nano-Impact Method [J].

Cheng, Wei ;

Compton, Richard G. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2014, 53 (50) :13928-13930

[10] Characterizing the Catecholamine Content of Single Mammalian Vesicles by Collision-Adsorption Events at an Electrode [J].

Dunevall, Johan ;

Fathali, Hoda ;

Najafinobar, Neda ;

Lovric, Jelena ;

Wigstrom, Joakim ;

Cans, Ann-Sofie ;

Ewing, Andrew G. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2015, 137 (13) :4344-4346

← 1 2 3 4 →