Skin-like self-assembled monolayers on InAs/GaSb superlattice photodetectors

Salihoglu, Omer
Muti, Abdullah
Kutluer, Kutlu
Tansel, Tunay
Turan, Raşit
We report on the effects of monolayer (ML) thick skin-like octadecanethiol (ODT, CH3[CH2](17)SH) on type-II InAs/GaSb MWIR photodetectors. Circumventing the ageing effects of conventional sulfur compounds, we use ODT, a self-assembling, long molecular chain headed with a sulfur atom. Photodiodes coated with and without the self-assembled monolayer (SAM) ODT were compared for their electrical and optical performances. For ODT-coated diodes, the dark current density was improved by two orders of magnitude at 77 K under -100 mV bias. The zero bias responsivity and detectivity were 1.04 A W (1) and 2.15 x 10(13) Jones, respectively, at 4 mu m and 77 K. The quantum efficiency was determined to be 37% for a cutoff wavelength of 5.1 mu m.


Solution processable donor acceptor type dibenzothiophen-S,S-dioxide derivatives for electrochromic applications
ÇAMURLU, PINAR; Durak, Tarik; Toppare, Levent Kamil (2011-10-15)
In this report, we highlight the synthesis and optical and electrochromic properties of dibenzothiophen-S,S-dioxide and 3-hexylthiophene based polymers. For this purpose a novel dibenzothiophen-S,S-dioxide and 3-hexylthiophene bearing, donor-acceptor-donor type monomer (THSO(2)) was synthesized through Stille cross-coupling reaction. THSO(2) was electrochemically polymerized in tetrabutylammonium hexafluorophosphate- dichloromethane couple. Furthermore, THSO(2) was subjected to electrochemical copolymerizat...
Bacterial anti-adhesive properties of a monolayer of zwitterionic block copolymer micelles
Hippius, Catharina; Butun, Vural; Erel Göktepe, İrem (Elsevier BV, 2014-08-01)
We report on bacterial anti-adhesive properties of a monolayer of block copolymer micelles (BCMs) with zwitterionic coronae and pH-responsive cores. BCMs were obtained by pH-induced self-assembly of selectively betainized poly[3-dimethyl (methacryloyloxyethyl) ammonium propane sulfonate-b-2-(diisopropylamino)ethyl methacrylate] (beta PDMA-b-PDPA) in aqueous solution above neutral pH. Monolayer films were self-assembled at pH 7.5 when beta PDMA-b-PDPA was in the micellar form. Bacterial anti-adhesive propert...
Multichromic benzimidazole-containing polymers: Comparison of donor and acceptor unit effects
Nurioglu, Ayda Goycek; Akpinar, Hava; Sendur, Merve; Toppare, Levent Kamil (2012-09-01)
This study reports a comparative study on electrochromic properties of two donoracceptordonor (DAD)-type polymers namely poly(2-heptyl-4,7-di(thiophen-2-yl)-1H-benzo [d]imidazole) (BImTh) and poly(4,7-bis(2,3-dihydrothieno[3,4-b] [1,4]dioxin-5-yl)-2-heptyl-1H-benzo[d]imidazole) (BImEd). DAD-type monomers were polymerized electrochemically on indium tin oxide-coated glass slides to determine the optical properties of the polymers. Electrochemical rho-doping experiments were performed to determine the band ga...
Poly(4-styrenesulfonic acid-co-maleic acid) stabilized cobalt(0) nanoparticles: A cost-effective and magnetically recoverable catalyst in hydrogen generation from the hydrolysis of hydrazine borane
Karahan, Senem; Özkar, Saim (2015-02-09)
Herein, we report the in situ generation, isolation and characterization of cobalt(0) nanoparticles, stabilized by poly(4-styrenesulfonic acid-co-maleic acid), PSSMA, and their catalytic activity in the hydrolysis of hydrazine borane (HB). Cobalt(0) nanoparticles having average particle size of 3.1 +/- 0.5 nm were prepared by in situ reduction of cobalt(II) chloride in aqueous solution of hydrazine borane in the presence of PSSMA, isolated magnetically from the catalytic reaction solution using a magnet, an...
ARICA, MY; Hasırcı, Vasıf Nejat (1993-01-01)
Poly(2-hydroxyethyl methacrylate) membranes were prepared in aqueous media with different ions and ionic strengths. The enzyme glucose oxidase was incorporated into some of these membranes. It was found that membrane water contents and ionic strengths have a linear relationship as long as the salt is not changed. When the salt was varied, only a relationship between salt concentration and water content could be observed. The membrane permeabilities were all found to be of the same order (10(-8) cm2 s-1) but...
Citation Formats
O. Salihoglu, A. Muti, K. Kutluer, T. Tansel, R. Turan, and A. AYDINLI, “Skin-like self-assembled monolayers on InAs/GaSb superlattice photodetectors,” JOURNAL OF PHYSICS D-APPLIED PHYSICS, pp. 0–0, 2012, Accessed: 00, 2020. [Online]. Available: