7 research outputs found
Nanoscale Reconfigurable Si Transistors: From Wires to Sheets and Unto MultiâWire Channels
Abstract In this work, bottomâup AlâSiâAl nanowire (NW) heterostructures are presented, which act as a prototype vehicle toward topâdown fabricated nanosheet (NS) and multiâwire (MW) reconfigurable fieldâeffect transistors (RFETs). Evaluating the key parameters of these transistors regarding the onâ and offâcurrents as well as threshold voltages for nâ and pâtype operation exhibit a high degree of symmetry. Most notably also a low deviceâtoâdevice variability is achieved. In this respect, the investigated AlâSi material system reveals its relevance for reconfigurable logic cells obtained from Si NSs. To show the versatility of the proposed devices, this work reports on a combinational wiredâAND gate obtained from a multiâgate RFET. Additionally, upâscaling the current is achieved by realizing a MW RFET without compromising reconfigurability. The AlâSiâAl platform has substantial potential to enable complex adaptive and selfâlearning combinational and sequential circuits with energy efficient and small footprint computing paradigms as well as for native components for hardware security circuits
Epitaxial Ge0.81Sn0.19 Nanowires for Nanoscale Mid-Infrared Emitters
The final publication is available via https://doi.org/10.1021/acsnano.9b02843.Austrian Science Funds (FWF)German Research Foundation (DFG)European Unionâs Horizon 202
A limited number of genes are involved in the differentiation of germinal center B cells
Mature B cells, upon activation, progressively differentiate through centroblasts into centrocytes and finally to plasmacytes that express large amounts of selected immunoglobulins. A significant part of this maturation is thought to involve induction of the unfolded protein response (UPR). We have compared gene expression in normal germinal center centroblasts, centrocytes, lymphoblastoid cells undergoing induced UPR, and the CCL155 plasmacytoma cell line. In the centroblast to centrocyte transition there is a change in the expression of a relatively small number of genes. These include a limited subset of the genes upregulated by a fully activated UPR as well as a small number of other transcription factors, some disulphide isomerases, and other genes. This is consistent with a model in which this transition is mediated by changes in the levels of expression of transcription factor B-lymphocyte-induced maturation protein 1 (Blimp1) (PRDM1), BACH2, X-box binding protein 1 (XBP1), interferon regulatory factor 4 (IRF4), and possibly vitamin D receptor (VDR) expression, together with post-transcriptional changes and a limited induction of aspects of the UPR