Tags: Analytical Seminar

Germanene is a germanium allotrope similar to graphene. Unlike graphene, germanene features a low-buckled structure, because the Ge-Ge bond in germanene has both sp2 and sp3 hybridization. However, germanene still features Dirac cones in its band structure, thus electrons near Fermi level behave as massless particles; resulting in ultra-high carrier mobility. Experimental formation of germanene has been reported starting 2014, but most of the…

The textbook is a multipurpose reference to find problem-solving algorithms or to gain conceptual understanding of the lecture content.1 The instructor-chosen textbook often drives the curriculum, especially for instructors with heavy teaching loads. Over the past 90 years, a traditional hard-copy text has been used to accompany the training of future chemists as the curriculum has evolved from purely descriptive chemistry to a “theory-first”…

The grafting of polymer chains on flat surfaces or nanoparticles is a promising approach to surface derivatization and manipulation that is increasingly being used in a variety of fields. Surface-confined polymers can be prepared via two main techniques: the grafting from, which leads to higher surface coverage (number of polymer chains/nm2), and the grafting to, which has the disadvantage of yielding low surface coverage because of steric…

Click chemistry combined with post-polymerization modification (PPM) of reactive polymer brushes can result in a wide array of surfaces, differing in chemical functionalities and morphologies.1 Poly(pentafluorophenyl acrylate) (Poly(PFPA)) brushes react quickly and quantitatively towards primary amines, with few side reactions, and have been shown to be a promising reactive scaffold for use in templating a variety of functionalities and…

In 2000, Mohamed et al. reported gold nanoparticles with a luminescence quantum yield six orders of magnitude greater than bulk gold.1 The enhancement was attributed to localized surface plasmon resonances. Recent studies understand and engineer the luminescence of nanoparticles by the altering particle geometries and plasmon modes.2-4 Interestingly, gold nanoparticles show two-photon-induced luminescence (TPIL) that can be measured at the…

Recent innovations in speed, accuracy and sensitivity have established mass spectrometry (MS) based methods as a key technology for the mapping and analysis of small molecules, lipids, peptides, protein, DNA and DNA-protein complexes in biological systems. In particular, Ion Mobility Spectrometry – Mass Spectrometry provides a powerful tool for the identification of structural motifs, and when complemented with theoretical calculations, it…