Zhao, Lin; Bhatia, Bikram; Yang, Sungwoo; Strobach, Elise; Weinstein, Lee A.; Cooper, Thomas A.; Chen, Gang; Wang, Evelyn N.
Harnessing Heat Beyond 200 °C from Unconcentrated Sunlight with Nonevacuated Transparent Aerogels
Heat at intermediate temperatures (120-220 °C) is in significant demand in both industrial and domestic sectors for applications such as water and space heating, steam generation, sterilization, and other industrial processes. Harnessing heat from solar energy at these temperatures, however, requires costly optical and mechanical components to concentrate the dilute…
Comprehensive Investigation and Analysis of Bulk-Heterojunction Microstructure of High-Performance PCE11:PCBM Solar Cells
Zhang, Chaohong; Heumueller, Thomas; Gruber, Wolfgang; Almora, Osbel; Du, Xiaoyan; Ying, Lei; Chen, Junwu; Unruh, Tobias; Cao, Yong; Li, Ning; Brabec, Christoph J.
Worldwide research efforts have been devoted to organic photovoltaics in the hope of a large-scale commercial application in the near future. To meet the industrial production requirements, organic photovoltaics that can reach power conversion efficiency (PCE) of over 10% along with promising operational device stability are of utmost interest. In…
The influence of pH, protein concentration and calcium ratio on the formation and structure of nanotubes from partially hydrolyzed bovine ?-lactalbumin
Geng, XiaoLu; Kirkensgaard, Jacob Judas Kain; Arleth, Lise; Otte, Jeanette; Ipsen, Richard
Formation of nanotubes from partially hydrolysed ?-lactalbumin (?-La) was investigated at five pH values, two concentrations of ?-La and two calcium levels. Nanotubes were formed under almost all combinations of the investigated factors, and for the first time the formation of nanotubes at low pH (4.0) and low protein concentration…
X-ray Scattering and Coarse-Grained Simulations for Clustering and Interactions of Monoclonal Antibodies at High Concentrations
Dear, Barton J.; Bollinger, Jonathan A.; Chowdhury, Amjad; Hung, Jessica J.; Wilks, Logan R.; Karouta, Carl A.; Ramachandran, Kishan; Shay, Tony Y.; Nieto, Maria P.; Sharma, Ayush; Cheung, Jason K.; Nykypanchuk, Dmytro; Godfrin, P. Douglas; Johnston, Keith P.; Truskett, Thomas M.
Attractive proteinprotein interactions (PPI) in concentrated monoclonal antibody (mAb) solutions may lead to reversible oligomers (clusters) that impact colloidal stability and viscosity. Herein, the PPI are tuned for two mAbs via the addition of arginine (Arg), NaCl, or ZnSO4 as characterized by the structure factor (Seff(q)) with small-angle X-ray scattering…
The role of disaccharides for proteinprotein interactions a SANS study
Olsson, Christoffer; Swenson, Jan
The disaccharide trehalose has shown outstanding anti-aggregation properties for proteins, which are highly important for the possibility to treat neurodegenerative diseases, such as Alzheimers and Huntingtons disease. However, the role and mechanism of trehalose for such stabilising effects are still largely unknown, partly because a direct structural picture of how…
Tuning the photoluminescence and anisotropic structure of PEDOT
Ivanko, Iryna; Pánek, Ji?í; Svoboda, Jan; Zhigunov, Alexander; Tomík, Elena
In the current work, we study the photoluminescence and anisotropic structure of PEDOT which is obtained in the presence of ions that perturb the water structure (ions in Hofmeister series). The water content in PEDOT has been confirmed by TGA and DSC measurements. The weight loss and heat flux together…
High-Performance Organic Electrochemical Transistors Based on Conjugated Polyelectrolyte Copolymers
Schmode, Philip; Ohayon, David; Reichstein, Paul M.; Savva, Achilleas; Inal, Sahika; Thelakkat, Mukundan
A new generation of polythiophene-based polyelectrolytes is reported to address fundamental issues in organic electrochemical transistors (OECTs). In such devices, the semiconductor must be able to transport and store ions and possess simultaneously a very high electronic mobility. For this, the ion-conducting 6-(thiophen-3-yl) hexane-1-sulfonate tetramethylammonium monomer (THSTMA+) is
A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells
Zhang, Chaohong; Heumueller, Thomas; Leon, Salvador; Gruber, Wolfgang; Burlafinger, Klaus; Tang, Xiaofeng; Perea, Jose D.; Wabra, Isabell; Hirsch, Andreas; Unruh, Tobias; Li, Ning; Brabec, Christoph J.
The operational stability of organic solar cells (OSCs) is the essential barrier to commercialization. Compared to thermally-induced degradation, photo-stability of OSCs is far away from being resolved. Here, we demonstrate that the thermal- and photo-degradation of metastable bulk-heterojunction OSCs are governed by the same mechanism. Understanding the fundamental principles behind…
Nano-modified HDPE/PA6 microfibrillar composites: Effect of aminated graphite platelets coupling
Kelnar, Ivan; Bal, Ümitcan; Zhigunov, Alexander; Kaprálková, Ludmila; Fortelný, Ivan; Krej?íková, Sabina; Kredatusová, Jana; Dybal, Ji?í; Janata, Miroslav; Nofar, Mohammadreza
Modification of microfibrillar composites (MFCs) by nanofillers shows important effects of its localization on performance. This work deals with control of migration/localization of amine-modified graphite nanoplatelets (GNPAs) in the HDPE/PA6 system through their in situ coupling. GNPA/HDPE linking also leads to complex morphology of PA6 fibers. Although such control of…
Effect of processing conditions on the mechanical properties of bio-inspired mechanical gradient nanocomposites
Zhang, Yefei; Edelbrock, Alexandra N.; Rowan, Stuart J.
Photo-induced thiol-ene crosslinking of allyl-functionalized cellulose nanocrystal (CNC)/polymer nanocomposites allows access to films that mimic the water-enhanced mechanical gradient characteristics of the squid beak. These films are prepared by mixing the functionalized CNCs and polymer in a solvent before solution casting and drying. The photocrosslinking agents are then imbibed into…