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 ?-fluidics, such as droplets motion and merging.

Autore Pugliese

• Hassan Omar Omar

Tutti gli autori

• S. Casalini ; M. Berto ; C. A. Bortolotti ; G. Foschi ; A. Operamolla ; M. Di Lauro ; O. Hassan Omar ; A. Liscio ; L. Pasquali ; M. Montecchi ; G. M. Farinola ; M. Borsari

Titolo volume/Rivista

ACS applied materials & interfaces

Anno di pubblicazione

2015

ISSN

1944-8252

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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