Adsorption kinetics of charged thiols on gold nanoparticles

被引：87

作者：

Bellino, MG ^{[1
]}

Calvo, EJ ^{[1
]}

Gordillo, G ^{[1
]}

机构：

[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, DQIAQF, INQUIMAE, AR-1428 Buenos Aires, DF, Argentina

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2004年 / 6卷 / 02期

关键词：

D O I：

10.1039/b312252b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Colloidal Au nanoparticles have been functionalized with mercaptopropane sulfonate (MPS) and mercaptoethylamine (MEA) short alkanethiols in aqueous solutions. Adsorption kinetics of these charged thiols onto gold nanoparticles has been followed by the decrease in the surface plasmon band at 530 nm due to the red shift caused by particle-to-particle aggregation. Titration curves resulted from plotting the 530 and 800 nm-absorbance versus the added amount of thiol in solution, and yielded the mercaptane coverage on An. While the adsorption of positively charged MEA on negatively charged An colloid is very rapid, slower and more complex adsorption kinetics have been found for the negatively charged MPS.

引用

页码：424 / 428

页数：5

共 33 条

[1] Self-assembled gold nanoparticle thin films with nonmetallic optical and electronic properties [J].

Brust, M ;

Bethell, D ;

Kiely, CJ ;

Schiffrin, DJ .

LANGMUIR, 1998, 14 (19) :5425-5429

[2] NOVEL GOLD-DITHIOL NANO-NETWORKS WITH NONMETALLIC ELECTRONIC-PROPERTIES [J].

BRUST, M ;

BETHELL, D ;

SCHIFFRIN, DJ ;

KIELY, CJ .

ADVANCED MATERIALS, 1995, 7 (09) :795-&

[3] Reversible tuning of silver quantum dot monolayers through the metal-insulator transition [J].

Collier, CP ;

Saykally, RJ ;

Shiang, JJ ;

Henrichs, SE ;

Heath, JR .

SCIENCE, 1997, 277 (5334) :1978-1981

[4] Single-molecule and single-nanoparticle SERS: Examining the roles of surface active sites and chemical enhancement [J].

Doering, WE ;

Nie, SM .

JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (02) :311-317

[5] Selective colorimetric detection of polynucleotides based on the distance-dependent optical properties of gold nanoparticles [J].

Elghanian, R ;

Storhoff, JJ ;

Mucic, RC ;

Letsinger, RL ;

Mirkin, CA .

SCIENCE, 1997, 277 (5329) :1078-1081

[6] Chemical self-assembly for electronic applications [J].

Fendler, JH .

CHEMISTRY OF MATERIALS, 2001, 13 (10) :3196-3210

[7] SELF-ASSEMBLED METAL COLLOID MONOLAYERS - AN APPROACH TO SERS SUBSTRATES [J].

FREEMAN, RG ;

GRABAR, KC ;

ALLISON, KJ ;

BRIGHT, RM ;

DAVIS, JA ;

GUTHRIE, AP ;

HOMMER, MB ;

JACKSON, MA ;

SMITH, PC ;

WALTER, DG ;

NATAN, MJ .

SCIENCE, 1995, 267 (5204) :1629-1632

[8] PREPARATION AND CHARACTERIZATION OF AU COLLOID MONOLAYERS [J].

GRABAR, KC ;

FREEMAN, RG ;

HOMMER, MB ;

NATAN, MJ .

ANALYTICAL CHEMISTRY, 1995, 67 (04) :735-743

[9] The fate of sulfur-bound hydrogen on formation of self-assembled thiol monolayers on gold:: 1H NMR spectroscopic evidence from solutions of gold clusters [J].

Hasan, M ;

Bethell, D ;

Brust, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (07) :1132-1133

[10] Pressure/temperature phase diagrams and superlattices of organically functionalized metal nanocrystal monolayers: The influence of particle size, size distribution, and surface passivant [J].

Heath, JR ;

Knobler, CM ;

Leff, DV .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (02) :189-197

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