Presentation is loading. Please wait.

Presentation is loading. Please wait.

Surfaces and Electrochemistry

Published byMerry Chandler Modified over 8 years ago

Similar presentations

Presentation on theme: "Surfaces and Electrochemistry"— Presentation transcript:

1 Surfaces and Electrochemistry
Dónal Leech Ext 3563 Room C205, Physical Chemistry

2 Course Texts Atkins and dePaula, Pysical Chemistry, 7th edition. Chapters 28 and 29 Attard and Barnes, Surfaces Adamson, Physical chemistry of surfaces Somorjai, Introduction to surface chemistry and catalysis Wang, Analytical electrochemistry, 2nd edition Fisher, Electrode dynamics Compton and Sanders, Electrode potentials Very useful web-site by Roger Nix, Queen Mary University of London

3 Course Outline ~16 hrs plus tutorials Adsorption Surface structure
Catalysis at surfaces Electron transfer theory Heterogeneous electron transfer Voltammetry

4 Why surfaces and electrochemistry?
Surface Electrochemistry Sensors, biosensors and assays Electrosynthesis Fuel cells Corrosion Surfaces Catalysis

5 Glucose Monitoring and Diabetes
Diabetes is a serious disease, and, with its complications, is the fourth leading cause of death by disease in the United States. Its causes are unknown, and there is no cure. Testing: A Crucial Tool Blood tests, done by pricking the finger for a drop of blood, are recommended by most doctors because they give the exact amount of blood sugar at any given moment. There are an estimated 14 million diabetics in the U.S. It is recommended to test blood glucose levels at least 4 times daily. Market of 56 millions disposable tests per day!!

6 Amperometric Blood Glucose Monitors
An example of a test is the use of the immobilised enzyme glucose oxidase, which releases electrons on interaction with glucose. A sensor of this type could detect the level of glucose in the blood.

7 Glucose Biosensors Glucose + O2 Gluconic acid + H2O2
Glucose + mediator(ox) Gluconic acid + mediator(red)

8 What is an electronic tongue?
Taste cell Nerve cell Taste compounds Electric responses Brain Taste reception Biological taste system Artificial liquid system - electronic tongue Sensor responses Computer array Pattern recognition Y. Vlasov, A. Legin, A. Rudnitskaya, Anal. Bioanal. Chem. 2002, 373, 136.

9 Fuel Cells: Energy Supply of the Future?

10 Principle of our membrane-less implantable bio-fuel cell

11 Green white paper an environmental challenge
Bleaching is necessary to obtain bright white paper Strong oxidant chemicals are used Chlorinated: Cl2 (not anymore), ClO2 Non-chlorinated: O2, O3, H2O2 Proposed alternative: oxidation of the pulp by an enzyme (laccase) or electrode and a mediator

12 Mediated delignification
O2  H2O 4e- Electrode O R e- Electrode

13 Electrochemical delignification
Mediator ox Lignin Lignin ox Electrode Counter (RVC 20ppi) Dialysis membrane to isolate counter from working Counter electrode casing (nalgene walls and nylon screen) Working electrode & casing Flow cell (interior covered with teflon)

Download ppt "Surfaces and Electrochemistry"

Similar presentations

BIOSENSORS NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY

BIOSENSORS NATIONAL INSTITUTE OF SCIENCE & TECHNOLOGY
EEE 529 Microsystems Amperometric Biosensors

EEE 529 Microsystems Amperometric Biosensors
Lecture 6a Cyclic Voltammetry.

Lecture 6a Cyclic Voltammetry.
Anthony Catalano.  Any device that analyzes a biological compound into a measurable signal  Composed of a bioreceptor, transducer, and an electronic.

Anthony Catalano.  Any device that analyzes a biological compound into a measurable signal  Composed of a bioreceptor, transducer, and an electronic.
Introduction to Electroanalytical Chemistry

Introduction to Electroanalytical Chemistry
Abstract Sibley School of Mechanical and Aerospace Engineering, Cornell University Researchers from Cornell University and the Cornell Lab of Ornithology.

Abstract Sibley School of Mechanical and Aerospace Engineering, Cornell University Researchers from Cornell University and the Cornell Lab of Ornithology.
CardioChek Plus Analyzer

CardioChek Plus Analyzer
Amperometric Biosensors. Introduction Enzyme Catalyzed redox reactions The function of the enzyme is to generate or consume an electroactive species in.

Amperometric Biosensors. Introduction Enzyme Catalyzed redox reactions The function of the enzyme is to generate or consume an electroactive species in.
Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. 16.5 Enzymes Enzymes are proteins.

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc Enzymes Enzymes are proteins.
Oxidation and reduction reactions occur in many chemical systems. Examples include the rusting of iron, the action of bleach on stains, and the reactions.

Oxidation and reduction reactions occur in many chemical systems. Examples include the rusting of iron, the action of bleach on stains, and the reactions.
Nanobiosensors Sara Huefner November 6, 2006. Outline Biosensor Background –What is a Biosensor? –Components of a Biosensor –Principles of Detection Biosensors.

Nanobiosensors Sara Huefner November 6, Outline Biosensor Background –What is a Biosensor? –Components of a Biosensor –Principles of Detection Biosensors.
ANALYTICAL CHEMISTRY CHEM 3811 CHAPTER 15 DR. AUGUSTINE OFORI AGYEMAN Assistant professor of chemistry Department of natural sciences Clayton state university.

ANALYTICAL CHEMISTRY CHEM 3811 CHAPTER 15 DR. AUGUSTINE OFORI AGYEMAN Assistant professor of chemistry Department of natural sciences Clayton state university.
1 Bioelectrochemistry: From Biofuel Cells to Membrane Electrochemistry Valentin Mirčeski Institute of Chemistry Faculty of Natural Sciences and Mathematics.

1 Bioelectrochemistry: From Biofuel Cells to Membrane Electrochemistry Valentin Mirčeski Institute of Chemistry Faculty of Natural Sciences and Mathematics.
A Wireless Implantable Microsystem for Continuous Blood Glucose Monitoring Currently 200M diabetic people around the world (~ 21M in U.S. in 2002).  Expectation.

A Wireless Implantable Microsystem for Continuous Blood Glucose Monitoring Currently 200M diabetic people around the world (~ 21M in U.S. in 2002).  Expectation.
BGM’s 1. Introduction  An estimated 135 million people worldwide — 18.2 million in the United States — have diabetes mellitus:  a disease in which the.

BGM’s 1. Introduction  An estimated 135 million people worldwide — 18.2 million in the United States — have diabetes mellitus:  a disease in which the.
Electrochemical Glucometers

Electrochemical Glucometers
Industrial and Medical Use of Enzymes. Biosensors.

Industrial and Medical Use of Enzymes. Biosensors.
Electroanalysis measure the variation of an electrical parameter (potential, current, charge, conductivity) and relate this to a chemical parameter (the.

Electroanalysis measure the variation of an electrical parameter (potential, current, charge, conductivity) and relate this to a chemical parameter (the.
Biosensors NNIN Document: NNIN-1245 Rev: 03/2012 National Nanotechnology Infrastructure Network www.nnin.org www.nnin.org Copyright Georgia Institute of.

Biosensors NNIN Document: NNIN-1245 Rev: 03/2012 National Nanotechnology Infrastructure Network Copyright Georgia Institute of.
Electrochemistry Chapter 4.4 and Chapter 20. Electrochemical Reactions In electrochemical reactions, electrons are transferred from one species to another.

Electrochemistry Chapter 4.4 and Chapter 20. Electrochemical Reactions In electrochemical reactions, electrons are transferred from one species to another.

Similar presentations

Ads by Google