Diogo V. Saraiva

Controlling viscosity to engineer focal conic domains in photonic cellulose nanocrystal films

Diogo V. Saraiva, Lotte Polling, Ivo R. Vermaire, Sander J. W. Vonk et autres

Cellulose nanocrystals (CNCs) form cholesteric architectures that can have color specific reflectivity and enable sustainable photonic films. However, achieving uniform color, suppressing iridescence, and accessing ordered defect structures such as focal conic domains remain challenging. Here, we control the photonic properties of …

Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Cellulose Nanocrystals Plant-derived, cellulose nanocrystals (CNCs) are abundant nanoparticles that can helically stack and form structural color (background polarized image, inset electron micrograph). In article number 2400104, Lisa Tran and co-workers show through surface-modification with a single surfactant, CNCs can be dispersed …

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Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Most paints contain pigments that absorb light and fade over time. A robust alternative can be found in nature, where structural coloration arises from the interference of light with submicron features. Plant‐derived, cellulose nanocrystals (CNCs) mimic these features by self‐assembling into a …

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Flexible, photonic films of surfactant-functionalized cellulose nanocrystals for pressure and humidity sensing

Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire et autres

Most paints contain pigments that absorb light and fade over time. A robust alternative can be found in nature, where structural coloration arises from the interference of light with submicron features. Plant-derived, cellulose nanocrystals (CNCs) mimic these features by self-assembling into a …

RESGATE DE FLORA EM ECOSSISTEMAS FERRUGINOSOS

Maiky Lopes Paulo, Cláudio Coelho de Paula, Diogo V. Saraiva, Ronaldo Silva

O Resgate de Flora é um procedimento obrigatório nos licenciamentos ambientais, quando a vegetação da área a ser suprimida para a implantação do empreendimento, possuir espécies contidas na Lista Nacional Oficial de Espécies da Fauna Ameaçadas de Extinção.A exploração de minério de …

Cellulose Nanocrystal Aqueous Colloidal Suspensions: Evidence of Density Inversion at the Isotropic‐Liquid Crystal Phase Transition (Adv. Mater. 28/2022)

Rafaela Raupp da Rosa, Pedro E. S. Silva, Diogo V. Saraiva, Anant Kumar et autres

Cellulose Nanocrystals Rod-like cellulose nanocrystal aqueous colloidal suspensions can be prepared from eucalyptus kraft pulp. In article number 2108227, Maria Helena Godinho and co-workers show the formation of a liquid crystalline (LC) phase atop an isotropic phase, inverted from the typical high-density …

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Cellulose Nanocrystal Aqueous Colloidal Suspensions: Evidence of Density Inversion at the Isotropic‐Liquid Crystal Phase Transition

Rafaela Raupp da Rosa, Pedro E. S. Silva, Diogo V. Saraiva, Anant Kumar et autres

The colloidal suspensions of aqueous cellulose nanocrystals (CNCs) are known to form liquid crystalline (LC) systems above certain critical concentrations. From an isotropic phase, tactoid formation, growth, and sedimentation have been determined as the genesis of a high-density cholesteric phase, which, after …

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Transmission Matrix of Cellulose Nanocrystal Coffee Stains

Itir Bakis Dogru-Yuksel, Roman Danser, Diogo V. Saraiva, Kira Maathius et autres

Utilizing nature's materials and methods that form structural color, cellulose nanocrystal coffee stains are fabricated by self-assembly, and their polarization-complete transmission matrix is analyzed in terms of their structural orientation.

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Flexible and Structural Coloured Composite Films from Cellulose Nanocrystals/Hydroxypropyl Cellulose Lyotropic Suspensions

Diogo V. Saraiva, Ricardo Chagas, Beatriz Martins de Abreu, Cláudia N. Gouveia et autres

Lyotropic colloidal aqueous suspensions of cellulose nanocrystals (CNCs) can, after solvent evaporation, retain their chiral nematic arrangement. As water is removed the pitch value of the suspension decreases and structural colour-generating films, which are mechanically brittle in nature, can be obtained. Increasing …

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Electro-optical devices based on cellulose nanocrystals

Diogo V. Saraiva

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Forecasting multivariate time series under present-value model short- and long-run co-movement restrictions

Osmani Teixeira de Carvalho Guillén, Alain Hecq, João Victor Issler, Diogo V. Saraiva

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Time Series under Present-Value-Model Short- and Long-run Co-movement Restrictions

Osmani Teixeira de Carvalho Guillén, Alain Hecq, João Victor Issler, Diogo V. Saraiva

This paper has two original contributions. First, we show that PV relationships entail a weak-form SCCF restriction, as in Hecq et al. (2006) and in Athanasopoulos et al. (2011), and implies a polynomial serial correlation common feature relationship (Cubadda and Hecq, 2001). …