Bernacka-Wójcik, I, Lopes {PA }, Vaz {AC}, Veigas {BMR}, Wojcik {PJ}, Simões P, Barata D, Fortunato {EMC}, Baptista {PMRV}, Águas {HMB}, de Martins {RFP}.
2013.
Bio-microfluidic platform for gold nanoprobe based DNA detection-application to Mycobacterium tuberculosis, oct. Biosensors & Bioelectronics. 48:87–93.: Elsevier
AbstractWe have projected and fabricated a microfluidic platform for DNA sensing that makes use of an optical colorimetric detection method based on gold nanoparticles. The platform was fabricated using replica moulding technology in PDMS patterned by high-aspect-ratio SU-8 moulds. Biochips of various geometries were tested and evaluated in order to find out the most efficient architecture, and the rational for design, microfabrication and detection performance is presented. The best biochip configuration has been successfully applied to the DNA detection of Mycobacterium tuberculosis using only 3 mu l on DNA solution (i.e. 90 ng of target DNA), therefore a 20-fold reduction of reagents volume is obtained when compared with the actual state of the art.
Conde, J, Ambrosone A, Hernandez Y, Marchesano V, Tian F, {Ricardo Ibarra} M, Baptista {PV}, Tortiglione C, {de la Fuente} {JM }.
2013.
Designing gold nanoparticles for in vivo gene silencing as a new therapeutic tool, dec. Human Gene Therapy. 24:A24–A24., Number 12: Mary Ann Leibert
Abstractn/a
Avo, J, Martins S, Jorge Parola A, Lima JC, Branco PS, Prates Ramalho JP, Pereira A.
2013.
A Family of Styrylcoumarins: Synthesis, Spectroscopic, Photophysical and Photochemical Properties, AUG. CHEMPLUSCHEM. 78:789-792., Number 8
Abstractn/a
Avo, J, Martins S, Parola AJ, Lima JC, Branco PS, Ramalho JPP, Pereira A.
2013.
A Family of Styrylcoumarins: Synthesis, Spectroscopic, Photophysical and Photochemical Properties, 2013. Chempluschem. 78:789-792.
Abstractn/a
Geng, Y, Seč D, Almeida PL, Lavrentovich OD, Žumer S, Godinho MH.
2013.
Liquid crystal necklaces: cholesteric drops threaded by thin cellulose fibres, 2013. Soft Matter. 9(33):7928-7933.: The Royal Society of Chemistry
AbstractLiquid crystals in confined geometries exhibit numerous complex structures often including topological defects that are controlled by the nematic elasticity, chirality and surface anchoring. In this work, we study the structures of cholesteric droplets pierced by cellulose fibres with planar anchoring at droplet and fibre surfaces. By varying the temperature we demonstrate the role of twisting power and droplet diameter on the equilibrium structures. The observed structures are complemented by detailed numerical simulations of possible director fields decorated by defects. Three distinct structures, a bipolar and two ring configurations, are identified experimentally and numerically. Designing cholesteric liquid crystal microdroplets on thin long threads opens new routes to produce fibre waveguides decorated with complex microresonators.
Geng, Y, Almeida PL, Feio GM, Figueirinhas JL, Godinho MH.
2013.
Water-Based Cellulose Liquid Crystal System Investigated by Rheo-NMR, 2013. MacromoleculesMacromolecules. 46(11):4296-4302.: American Chemical Society
AbstractWater-based cellulose cholesteric liquid crystalline phases at rest can undergo structural changes induced by shear flow. This reflects on the deuterium spectra recorded when the system is investigated by rheo-nuclear magnetic resonance (rheo-NMR) techniques. In this work, the model system hydroxypropylcellulose (HPC)+water is revisited using rheo-NMR to clarify unsettled points regarding its behavior under shear and in relaxation. The NMR spectra allow the identification of five different stable ordering states, within shear and relaxation, which are well integrated in a mesoscopic picture of the system’s structural evolution under shear and relaxation. This picture emerging from the large body of studies available for this system by other experimental techniques, accounts well for the NMR data and is in good agreement with the three distinct regions of steady shear flow recognized for some lyotropic LC polymers. Shear rates in between 0.1 and 1.0 s–1 where investigated using a Taylor–Couette flow and deuterated water was used as solvent for the deuterium NMR (DNMR) analysis.Water-based cellulose cholesteric liquid crystalline phases at rest can undergo structural changes induced by shear flow. This reflects on the deuterium spectra recorded when the system is investigated by rheo-nuclear magnetic resonance (rheo-NMR) techniques. In this work, the model system hydroxypropylcellulose (HPC)+water is revisited using rheo-NMR to clarify unsettled points regarding its behavior under shear and in relaxation. The NMR spectra allow the identification of five different stable ordering states, within shear and relaxation, which are well integrated in a mesoscopic picture of the system’s structural evolution under shear and relaxation. This picture emerging from the large body of studies available for this system by other experimental techniques, accounts well for the NMR data and is in good agreement with the three distinct regions of steady shear flow recognized for some lyotropic LC polymers. Shear rates in between 0.1 and 1.0 s–1 where investigated using a Taylor–Couette flow and deuterated water was used as solvent for the deuterium NMR (DNMR) analysis.
Ruivo, A, Almeida T, Quintas F, Wiley R, Troeira M, Paulino N, Laia CAT, Queiroz CA, de Matos PA.
2013.
Colours of Luminescent Glasses for Artworks. Proceedings of 12th International AIC Colour Congress. :885-888., Newcastle Gateshead, UK