Literature DB >> 563737

A band model for melanin deducted from optical absorption and photoconductivity experiments.

P R Crippa, V Cristofoletti, N Romeo.   

Abstract

Natural and synthetic melanins have been studied by optical absorption and photoconductivity measurements in the range 200--700 nm. Both optical absorption and photoconductivity increase in the ultraviolet region, and a negative photoconductivity was observed with a maximum near 500 nm. This behaviour has been interpreted by the band model of amorphous materials and an "optical gap" of 3.4 eV has been determined.

Entities:  

Mesh：

Substances：

Year:  1978        PMID： 563737     DOI： 10.1016/0304-4165(78)90260-x

Source DB:  PubMed          Journal:  Biochim Biophys Acta        ISSN： 0006-3002


  15 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.  Quantifying melanin concentration in retinal pigment epithelium using broadband photoacoustic microscopy.

Authors:  Xiao Shu; Hao Li; Biqin Dong; Cheng Sun; Hao F Zhang
Journal:  Biomed Opt Express       Date:  2017-05-04       Impact factor: 3.732

3.  Remotely activated protein-producing nanoparticles.

Authors:  Avi Schroeder; Michael S Goldberg; Christian Kastrup; Yingxia Wang; Shan Jiang; Brian J Joseph; Christopher G Levins; Sneha T Kannan; Robert Langer; Daniel G Anderson
Journal:  Nano Lett       Date:  2012-05-08       Impact factor: 11.189

4.  Melanin photoprotection in the human retinal pigment epithelium and its correlation with light-induced cell apoptosis.

Authors:  Brandon-Luke L Seagle; Kourous A Rezai; Yasuhiro Kobori; Elzbieta M Gasyna; Kasra A Rezaei; James R Norris
Journal:  Proc Natl Acad Sci U S A       Date:  2005-06-10       Impact factor: 11.205

5.  Role of semiconductivity and ion transport in the electrical conduction of melanin.

Authors:  Albertus B Mostert; Benjamin J Powell; Francis L Pratt; Graeme R Hanson; Tadeusz Sarna; Ian R Gentle; Paul Meredith
Journal:  Proc Natl Acad Sci U S A       Date:  2012-05-21       Impact factor: 11.205

6.  Chemical and structural disorder in eumelanins: a possible explanation for broadband absorbance.

Authors:  M Linh Tran; Ben J Powell; Paul Meredith
Journal:  Biophys J       Date:  2005-11-11       Impact factor: 4.033

7.  Quantitative photoacoustics to measure single cell melanin production and nanoparticle attachment.

Authors:  Kiran Bhattacharyya; Adam Eshein; Anand Chandrasekhar; John A Viator
Journal:  Phys Med Biol       Date:  2015-03-24       Impact factor: 3.609

8.  Photoprotection of human retinal pigment epithelium cells against blue light-induced apoptosis by melanin free radicals from Sepia officinalis.

Authors:  Brandon-Luke L Seagle; Elzbieta M Gasyna; William F Mieler; James R Norris
Journal:  Proc Natl Acad Sci U S A       Date:  2006-10-30       Impact factor: 11.205

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

Authors:  M Abbas; F D'Amico; L Morresi; N Pinto; M Ficcadenti; R Natali; L Ottaviano; M Passacantando; M Cuccioloni; M Angeletti; R Gunnella
Journal:  Eur Phys J E Soft Matter       Date:  2009-02-03       Impact factor: 1.890

10.  Tolerance of an albino fish to ultraviolet-B radiation.

Authors:  D L Fabacher; E E Little; G K Ostrander
Journal:  Environ Sci Pollut Res Int       Date:  1999       Impact factor: 4.223
View more

北京卡尤迪生物科技股份有限公司 © 2022-2023.