Four linear terarylene molecules (i) 4-nitro-terphenyl-4″-methanethiol (NTM), (ii) 4-nitro-terphenyl-3″,5″-dimethanethiol (NTD), (iii) ([1,1';4',1″] terphenyl-3,5-diyl)methanethiol (TM), and (iv) ([1,1';4',1″] terphenyl-3,5-diyl)dimethanethiol (TD) have been synthesized and their self-assembled monolayers (SAMs) have been obtained on polycrystalline gold. NTM and NTD SAMs have been characterized by X-ray photoelectron spectroscopy, Kelvin probe measurements, electrochemistry, and contact angle measurements. The terminal nitro group (-NO2) is irreversibly reduced to hydroxylamine (-NHOH), which can be reversibly turned into nitroso group (-NO). The direct comparison between NTM/NTD and TM/TD SAMs unambiguously shows the crucial influence of the nitro group on electrowetting properties of polycrystalline Au. The higher grade of surface tension related to NHOH has been successfully exploited for basic operations of digital μ-fluidics, such as droplets motion and merging.

Electrowetting of nitro-functionalized oligoarylene thiols self-assembled on polycrystalline gold / Casalini, Stefano; Berto, Marcello; Bortolotti, Carlo Augusto; Foschi, Giulia; Operamolla, Alessandra; DI LAURO, Michele; Omar, Omar Hassan; Liscio, Andrea; Pasquali, Luca; Montecchi, Monica; Farinola, Gianluca M; Borsari, Marco. - In: ACS APPLIED MATERIALS & INTERFACES. - ISSN 1944-8244. - STAMPA. - 7:7(2015), pp. 3902-3909. [10.1021/am509104z]

Electrowetting of nitro-functionalized oligoarylene thiols self-assembled on polycrystalline gold

CASALINI, Stefano;berto, marcello;BORTOLOTTI, Carlo Augusto;FOSCHI, GIULIA;DI LAURO, MICHELE;PASQUALI, Luca;MONTECCHI, Monica;BORSARI, Marco
2015

Abstract

Four linear terarylene molecules (i) 4-nitro-terphenyl-4″-methanethiol (NTM), (ii) 4-nitro-terphenyl-3″,5″-dimethanethiol (NTD), (iii) ([1,1';4',1″] terphenyl-3,5-diyl)methanethiol (TM), and (iv) ([1,1';4',1″] terphenyl-3,5-diyl)dimethanethiol (TD) have been synthesized and their self-assembled monolayers (SAMs) have been obtained on polycrystalline gold. NTM and NTD SAMs have been characterized by X-ray photoelectron spectroscopy, Kelvin probe measurements, electrochemistry, and contact angle measurements. The terminal nitro group (-NO2) is irreversibly reduced to hydroxylamine (-NHOH), which can be reversibly turned into nitroso group (-NO). The direct comparison between NTM/NTD and TM/TD SAMs unambiguously shows the crucial influence of the nitro group on electrowetting properties of polycrystalline Au. The higher grade of surface tension related to NHOH has been successfully exploited for basic operations of digital μ-fluidics, such as droplets motion and merging.
2015
11-feb-2015
7
7
3902
3909
Electrowetting of nitro-functionalized oligoarylene thiols self-assembled on polycrystalline gold / Casalini, Stefano; Berto, Marcello; Bortolotti, Carlo Augusto; Foschi, Giulia; Operamolla, Alessandra; DI LAURO, Michele; Omar, Omar Hassan; Liscio, Andrea; Pasquali, Luca; Montecchi, Monica; Farinola, Gianluca M; Borsari, Marco. - In: ACS APPLIED MATERIALS & INTERFACES. - ISSN 1944-8244. - STAMPA. - 7:7(2015), pp. 3902-3909. [10.1021/am509104z]
Casalini, Stefano; Berto, Marcello; Bortolotti, Carlo Augusto; Foschi, Giulia; Operamolla, Alessandra; DI LAURO, Michele; Omar, Omar Hassan; Liscio, A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1067869
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