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Merck
CN

651818

Gold etchant, standard

Synonym(s):

Antistrumin, Potassium monoiodide

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About This Item

CAS Number:
7681-11-0
UNSPSC Code:
12352302
NACRES:
NA.23
MDL number:
MFCD07370792
Solubility:
H2O: miscible

Key Documents

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SMILES string

[K+].[I-]

InChI

1S/HI.K/h1H;/q;+1/p-1

InChI key

NLKNQRATVPKPDG-UHFFFAOYSA-M

composition

volatiles, 50-80%

bp

100 °C (lit.), 100 °C/1 atm

solubility

H2O: miscible

density

1.2924 g/mL at 25 °C (lit.)

Quality Level

100

Related Categories

General description

Etching readily controlled with minimum undercutting. Room temperature operated. Cyanide-free for standard applications. Etch rate of 28 angstrom/sec @ 25 °C.
Gold etchant is a combination of potassium iodide and iodine as complexing agents synthesized by electrochemically oxidizing gold.

Application

Gold etchant is a selective general-purpose etchant for gold, compatible with negative and positive photoresists. It is used to etch out gold (Au) electrodes prior to scanning electron microscopy (SEM) imaging for morphological study and metal layer for the preparation of nanoelectrodes array. Gold etchant can also be used in metal assisted chemical etching (MACE) for the fabrication of p-n junction silicon nanopillar based solar cells.

signalword

Danger

target_organs

Thyroid

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

ppe

Eyeshields, Faceshields, Gloves, multi-purpose combination respirator cartridge (US)

pictograms

Health hazardExclamation mark
GHS08,GHS07

Hazard Classifications

Eye Irrit. 2 - Repr. 1B - STOT RE 2

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Certificates of Analysis (COA)

Lot/Batch Number
MKDB1109
MKCZ0712
MKCV5982
MKCW9292
MKCT0684

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Scalable long-term extraction of photosynthetic electrons by simple sandwiching of nanoelectrode array with densely-packed algal cell film.
Kim J et al.
Biosensors And Bioelectronics, 117(10), 15-22 (2018)
High performance nanopillars array silicon solar cells.
Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP), 117(10), 1-5 (2013)
A two-step annealing process for enhancing the ferroelectric properties of poly (vinylidene fluoride)(PVDF) devices.
Park H, et al.
Journal of Material Chemistry C, 3(10), 2366-2370 (2015)
Cyanide-and thiourea-free electrochemical etching of gold for microelectronics applications.
Hu Z and Ritzdorf T
Journal of the Electrochemical Society, 154(10), D543-D549 (2007)
Abhinav Sharma et al.
Scientific reports, 9(1), 5970-5970 (2019-04-14)
Cardiac troponin T (cTnT) is considered a clinical standard for its high specificity and sensitivity when diagnosing acute myocardial infarction; however, most studies on the electrical sensors of cardiac troponin biomarkers have focused on cTnI rather than cTnT. This study
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Protocols

Negative Photoresist Procedure

Photoresist kit offers pre-weighed chemical components for lithographic processes, with separate etchants for various substrate choices.

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