Surfactant-assisted synthesis of large Cu-BTC MOF single crystals and their potential utilization as photodetectors. Issue 26 (13th June 2019)

• Record Type: Journal Article
• Authors: Sun, Yu; Amsler, Maximilian; Goedecker, Stefan; Caravella, Alessio; Yoshida, Masaki; Kato, Masako
• Is Part Of: CrystEngComm. Volume 21:Issue 26(2019)
• Page Start: 3948
• Page End: 3953
• Publication Date: 2019-06-13
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce00440h
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : The preferential growth of dense Cu-BTC MOFs ( Cu-s ) with the assistance of surfactants PF-127 has been investigated, forming long rods with an average length up to ∼3 mm. A simple photo-detecting device was fabricated, showing current enhancement under illumination. Abstract : In this study, we discovered a method to synthesize large single crystals of Cu-BTC MOFs ( Cu-s ) with the assistance of a surfactant (PF-127) in an ethanol–water mixture solution. Single crystal and powder XRD (X-ray diffraction) measurements revealed that Cu-s, with the appearance of long rods, has the chemical formula Cu(BTC)3 ·H2 O. We proposed the growth mechanism of Cu-s by a series of experiments and demonstrated that the addition of surfactant PF-127 can effectively inhibit the contact between Cu 2+ ions and BTC ligands, which favoured the growth of Cu-s along the a -axis and suppressed the fast formation of porous Cu-BTC MOFs (HKUST-1). Considering that the photoactive properties of Cu-s and its relatively large size (an average length of up to ∼3 mm), we constructed a simple photo-detector device, showing excellent photo-sensing properties under illumination.