Analytical characterization of microlithographically fabricated iridium-based ultramicroelectrode arrays

被引：2

作者：

Feeney, R ^{[1
]}

Herdan, J ^{[1
]}

Nolan, MA ^{[1
]}

Tan, SH ^{[1
]}

Tarasov, VV ^{[1
]}

Kounaves, SP ^{[1
]}

机构：

[1] Tufts Univ, Dept Chem, Medford, MA 02155 USA

来源：

ELECTROANALYSIS | 1998年 / 10卷 / 02期

关键词：

mercury-coated iridium ultramicroelectrode arrays; stripping voltammetry; microlithography;

D O I：

10.1002/(SICI)1521-4109(199802)10:2<89::AID-ELAN89>3.3.CO;2-A

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The analytical performance of several mercury-coated iridium ultramicroelectrode arrays (IrUMEAs) was studied using square wave anodic stripping voltammetry (SWASV) for determination of cadmium in a pH 4.5 acetate buffer. The microlithographically fabricated IrUMEAs consisted of either 20 or 25 individual disk shaped UMEs, each 10 irm in diameter. The insulating layer utilized in the fabrication process was either silicon dioxide (5000 Angstrom) or silicon nitride (1500 Angstrom or 2500 Angstrom). Calibration plots demonstrated good linearity for cadmium from 0-100 ppb. Standard deviations, detection limits, and correlation coefficients were calculated to determine the stability and reproducibility of the IrUMEAs. Repetitive cycles of depositing and stripping Hg at the IrUMEA surface resulted in increased distortion and loss of the SWASV signal. Atomic force microscopy revealed a subtle transformation in the IrUMEA surfaces.

引用

页码：89 / 93

页数：5

共 20 条

[1] Mercury-plated iridium-based microelectrode arrays for trace metals detection by voltammetry: Optimum conditions and reliability
Belmont, C
Tercier, ML
Buffle, J
Fiaccabrino, GC
KoudelkaHep, M
[J]. ANALYTICA CHIMICA ACTA, 1996, 329 (03) : 203 - 214
[2] SENSOR ARRAY FOR CARBOHYDRATES AND AMINO-ACIDS BASED ON ELECTROCATALYTIC MODIFIED ELECTRODES
CHEN, Q
WANG, J
RAYSON, G
TIAN, BM
LIN, YH
[J]. ANALYTICAL CHEMISTRY, 1993, 65 (03) : 251 - 254
[3] MICROFABRICATED SENSOR ARRAYS SENSITIVE TO PH AND K+ FOR IONIC DISTRIBUTION MEASUREMENTS IN THE BEATING HEART
COSOFRET, VV
ERDOSY, M
JOHNSON, TA
BUCK, RP
ASH, RB
NEUMAN, MR
[J]. ANALYTICAL CHEMISTRY, 1995, 67 (10) : 1647 - 1653
[4] Serial array of ISEs for use in a portable battery-powered flow injection analyzer
Dimitrakopoulos, T
Alexander, PW
Hibbert, DB
[J]. ELECTROANALYSIS, 1996, 8 (05) : 438 - 442
[5] FELDEN PR, 1993, ANAL CHIM ACT, V273, P111
[6] GUMINSKI C, 1986, SOLUBILITY DATA SERI
[7] MICROELECTRODE ARRAYS AND APPLICATION TO BIOSENSING DEVICES
HINTSCHE, R
PAESCHKE, M
WOLLENBERGER, U
SCHNAKENBERG, U
WAGNER, B
LISEC, T
[J]. BIOSENSORS & BIOELECTRONICS, 1994, 9 (9-10) : 697 - 705
[8] AN IRIDIUM BASED MERCURY ULTRAMICROELECTRODE - FABRICATION AND CHARACTERIZATION
KOUNAVES, SP
DENG, W
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 301 (1-2) : 77 - 85
[9] AN IRIDIUM BASED MERCURY FILM ELECTRODE .2. COMPARISON OF MERCURY-FILM ELECTRODE BEHAVIORS - THEORY VERSUS REALITY
KOUNAVES, SP
BUFFLE, J
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 239 (1-2): : 113 - 123
[10] ANALYTICAL UTILITY OF THE IRIDIUM-BASED MERCURY ULTRAMICROELECTRODE WITH SQUARE-WAVE ANODIC-STRIPPING VOLTAMMETRY
KOUNAVES, SP
DENG, W
[J]. ANALYTICAL CHEMISTRY, 1993, 65 (04) : 375 - 379

← 1 2 →