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Literature DB >> 16284765

Study of optical properties of electropolymerized melanin films by photopyroelectric spectroscopy.

José Eduardo de Albuquerque¹, Clare Giacomantonio, Andrew G White, Paul Meredith.

Abstract

Photopyroelectric (PPE) spectroscopy, in the 350-1,075 nm wavelength range, was used to study the optical properties of electropolymerized melanin films on indium tin oxide (ITO) coated glass. The PPE intensity signal as a function of the wavelength lambda, V (n)(lambda) and its phase F (n)(lambda) were independently measured. Using the PPE signal intensity and the thermal and optical properties of the pyroelectric detector, we were able to calculate the optical absorption coefficient beta of melanin in the solid-state. We believe this to be the first such measurement of its kind on this material. Additionally, we found an optical gap in these melanin films at 1.70 eV.

Entities: Chemical

Mesh：

Substances：
Melanins
Polymers

Year: 2005 PMID： 16284765 DOI： 10.1007/s00249-005-0020-z

Source DB: PubMed Journal: Eur Biophys J ISSN： 0175-7571 Impact factor: 1.733

4 in total

1. Photoacoustic studies of non-radiative relaxation of excited states in melanin.

Authors: P R Crippa; C Viappiani
Journal: Eur Biophys J Date: 1990 Impact factor: 1.733

2. A first-principles density-functional calculation of the electronic and vibrational structure of the key melanin monomers.

Authors: B J Powell; T Baruah; N Bernstein; K Brake; Ross H McKenzie; P Meredith; M R Pederson
Journal: J Chem Phys Date: 2004-05-08 Impact factor: 3.488

3. Amorphous semiconductor switching in melanins.

Authors: J McGinness; P Corry; P Proctor
Journal: Science Date: 1974-03-01 Impact factor: 47.728

4. Radiative relaxation quantum yields for synthetic eumelanin.

Authors: Paul Meredith; Jennifer Riesz
Journal: Photochem Photobiol Date: 2004-02 Impact factor: 3.421

4 in total

6 in total

Study of optical properties of electropolymerized melanin films by photopyroelectric spectroscopy.

1. Photoacoustic studies of non-radiative relaxation of excited states in melanin.

2. A first-principles density-functional calculation of the electronic and vibrational structure of the key melanin monomers.

3. Amorphous semiconductor switching in melanins.

4. Radiative relaxation quantum yields for synthetic eumelanin.

1. Pump-probe imaging differentiates melanoma from melanocytic nevi.

2. Quantitative scattering of melanin solutions.

Review 3. Chemical and structural diversity in eumelanins: unexplored bio-optoelectronic materials.

4. Structural, electrical, electronic and optical properties of melanin films.

5. Structural and optical investigation on the wings of Idea malabarica (Moore, 1877).

Review 6. Melanins as Sustainable Resources for Advanced Biotechnological Applications.