Promising anchoring groups for single-molecule conductance measurements

The understanding of the charge transport through single molecule junctions is a prerequisite for the design and building of electronic circuits based on single molecule junctions. However, reliable and robust formation of such junctions is a challenging task to achieve. In this topical review, we present a systematic investigation of the anchoring group effect on single molecule junction conductance by employing two complementary techniques, namely scanning tunneling microscopy break junction (STM-BJ) and mechanically controllable break junction (MCBJ) techniques, based on the studies published in the literature and important results from our own work. We compared conductance studies for conventional anchoring groups described earlier with the molecular junctions formed through π-interactions with the electrode surface (Au, Pt, Ag) and we also summarized recent developments in the formation of highly conducting covalent Au–C σ-bonds using oligophenyleneethynylene (OPE) and an alkane molecular backbone. Specifically, we focus on the electron transport properties of diaryloligoyne, oligophenyleneethynylene (OPE) and/or alkane molecular junctions composed of several traditional anchoring groups, (dihydrobenzo[b]thiophene (BT), 5-benzothienyl analogue (BTh), thiol (SH), pyridyl (PY), amine (NH2), cyano (CN), methyl sulphide (SMe), nitro (NO2)) and other anchoring groups at the solid/liquid interface. The qualitative and quantitative comparison of the results obtained with different anchoring groups reveals structural and mechanistic details of the different types of single molecular junctions. The results reported in this prospective may serve as a guideline for the design and synthesis of molecular systems to be used in molecule-based electronic devices.

Islamophobia as Reactive Co-Radicalization

Since 9/11, 2001, a new form of religious extremism has arguably emerged, one which paradoxically portrays itself as a counter to another perceived extremism regarded as a real and imminent threat. Within North America and Western Europe, as elsewhere, there is an upsurge of various forms of reactionary rhetoric and opposition expressed towards Islam and Muslims. An increase in extremist behaviour, even violence, is appearing from quarters opposed to, or varyingly fearful of, Islamic extremism if not Islam or Muslims. Islamophobia, as a manifestation of fear of an exclusionary Islam, manifests as exclusionary or negatively reactive behaviours with Muslims and Islam as the target. This article explores the idea that Islamophobia can be regarded as a manifestation of religious extremism and, further, that such extremism is construable as “reactive co-radicalization.” It focuses on two European cases – the 2009 Swiss ban on the building of minarets and the 2011 Norwegian massacre carried out by Anders Breivik – as examples of this “reactive co-radicalization.” This term, I suggest, is an apt denominator for the exclusionary reaction to the rising presence of Islam within otherwise secular, albeit nominally Christian, Western European and North American societies, among others.