Article
Chemistry, Multidisciplinary
Jonathan M. Chan, Muzhou Wang
Summary: The orientation of chains within polymeric materials is important for their properties, and single-molecule localization microscopy is used to visualize chain directions in spin-coated polymer films. The study reveals a strong relationship between shear force and chain orientation, as well as the effects of chain length and solvent evaporation rate.
Article
Nanoscience & Nanotechnology
Yasi Wang, Peng Liu, Huimin Shi, Yutong Dai, Jian Zhang, Jianmin Zhang, Yueqiang Hu, Huigao Duan, Yiqin Chen
Summary: A simple approach to improve the stability of polymer nanostructures by coating a conformal ultrathin oxide film has been proposed and demonstrated in this work. The oxide layer enhances the stability of polymer structures by prohibiting deformation occurrences from thermally induced reflow and organic solution. Coated polymer structures show high temperature stability and good resistance to soluble damage, which significantly broadens their application as functional elements for optical structures/devices.
Article
Chemistry, Physical
Aaron M. M. Day, Jonathan R. R. Dietz, Madison Sutula, Matthew Yeh, Evelyn L. L. Hu
Summary: In this study, we demonstrate the direct laser writing of cavity-integrated spin defects using a nanosecond pulsed above-bandgap laser, allowing real-time monitoring of silicon-monovacancy defect formation within the cavity-mode volume. We observe spin resonance, cavity-integrated photoluminescence, and excited-state lifetimes consistent with conventional methods, without the need for post-irradiation thermal annealing. This localized defect formation method, combined with cavity-integrated defect spins, is crucial for engineering cavity-emitter coupling for quantum networking.
Article
Optics
Niels Heermeier, Tobias Heuser, Jan Grosse, Natalie Jung, Arsenty Kaganskiy, Markus Lindemann, Nils C. Gerhardt, Martin R. Hofmann, Stephan Reitzenstein
Summary: Spin-controlled lasers and high-beta quantum dot micropillar lasers are two fascinating photonic devices with potential applications. The experimental and predicted polarization oscillation frequencies of spin-laser effects are presented, demonstrating the possibility of developing more compact, faster, and more energy-efficient spin-lasers.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Xinyuan Ma, Prasoon K. Shandilya, Paule Arclay
Summary: Optomechanical cavities are powerful tools for information processing, and we have developed a semiconductor-on-diamond platform that co-localizes phononic and photonic modes without requiring undercutting. We designed an optomechanical crystal cavity with high optomechanical coupling and low dissipation, showing promise for quantum information processing devices based on spin, phonon, and photon interactions.
Article
Engineering, Electrical & Electronic
Jingzan Jiang, Yadan Deng, Jun Sun, Qiuhong Cui, Zhidong Lou, Yanbing Hou, Yufeng Hu, Feng Teng
Summary: This study successfully fabricated highly aligned polymer films on nanogrooved substrates by adding alpha-chloronaphthalene (alpha-CN) to the chloroform solution. The resulting films showed an absorbance dichroic ratio as high as 16 and the polymer field effect transistors exhibited a mobility six times that of the control devices.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Jingzan Jiang, Yadan Deng, Jun Sun, Qiuhong Cui, Zhidong Lou, Yanbing Hou, Yufeng Hu, Feng Teng
Summary: This work demonstrates the fabrication of highly aligned polymer films on nanogrooved substrates using spin coating with the help of an alpha-chloronaphthalene (alpha-CN) additive. The resulting films show high absorbance dichroic ratio and mobility, with comparable or even better performance than other aligned polymer film-based devices reported in the literature.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jefferson Dixon, Feng Pan, Parivash Moradifar, Priyanuj Bordoloi, Sahil Dagli, Jennifer Dionne
Summary: When light interacts with matter, it produces color through scattering and absorption. The symmetry of matter can be examined through the polarization of light, especially circularly-polarized light. Recent advances in controlling circularly-polarized light have shown that judicious control of longitudinal symmetry is a key factor. This can be applied in various fields such as optical communication, quantum emitters control, and detection of small molecule asymmetry.
Article
Chemistry, Physical
Stepan Sokolov, Alexey Balynin, Danila Bakhtin, Ilya Borisov
Summary: The study investigated the influence of centrifugation process parameters on the transport properties of composite membranes, revealing an unexpected dependence of permeance and ideal selectivity on rotation speed. As rotation speed increases, the thickness of the selective layer decreases while gas permeance diminishes due to increased penetration depth of polymer solution into the support layer's porous structure.
Article
Chemistry, Multidisciplinary
C. Garcia-Cabezon, V. Godinho, C. Perez-Gonzalez, Y. Torres, F. Martin-Pedrosa
Summary: This study proposes an innovative strategy combining powder metallurgy based space-holder (SH) technique and electropolymerization to prepare porous biocompatible Ti substrates coated with PPy-AgNPs composite conductive polymers. The coated substrates show excellent adhesion and corrosion resistance, as well as enhanced antibacterial activity. This strategy has significant potential for the substitution of small damaged bone tissues, such as in tumors.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
C. Garcia-Cabezon, V. Godinho, C. Perez-Gonzalez, Y. Torres, F. Martin-Pedrosa
Summary: This study proposes an innovative strategy that combines two well-known easy and economical preparation techniques to provide porous Ti substrates for cortical bone tissue substitution, promoting bone in-growth and improving corrosion resistance, biocompatibility, and antibacterial activity by coating the substrates with PPy-AgNPs composite conductive polymers.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Xiaoyang Duan, Bo Wang, Kexiu Rong, Chieh-Li Liu, Vladi Gorovoy, Subhrajit Mukherjee, Vladimir Kleiner, Elad Koren, Erez Hasman
Summary: The researchers have demonstrated a room-temperature valley-addressable tungsten disulfide monolayer laser where the spin of lasing can be controlled by the spin of the pump without the need for magnetic fields. By manipulating the spin-valley coupling, this nanophotonic platform provides versatile coherent spin-light sources that can operate at room temperature.
Article
Chemistry, Multidisciplinary
Noah Mendelson, Ritika Ritika, Mehran Kianinia, John Scott, Sejeong Kim, Johannes E. Froch, Camilla Gazzana, Mika Westerhausen, Licheng Xiao, Seyed Sepehr Mohajerani, Stefan Strauf, Milos Toth, Igor Aharonovich, Zai-Quan Xu
Summary: A scalable approach has been demonstrated to greatly enhance the emission of V-B(-) defects by coupling to a plasmonic gap cavity. This enhancement in photoluminescence and optically detected magnetic resonance contrast will be crucial for advances in quantum sensing using 2D materials and in the realization of nanophotonic devices with spin defects in hexagonal boron nitride.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kirill O. Nikolaev, Stephanie R. Lake, Georg Schmidt, Sergej O. Demokritov, Vladislav E. Demidov
Summary: This study successfully demonstrates spin-wave devices that can operate without an external magnetic field using submicrometer wide waveguides. The experimental results show that these waveguides have a highly stable magnetic configuration at zero field and support long-range propagation of spin waves. These findings provide the basis for the development of energy-efficient zero-field spin-wave devices and circuits.
Article
Chemistry, Multidisciplinary
Johannes E. Froech, Lesley P. Spencer, Mehran Kianinia, Daniel D. Totonjian, Minh Nguyen, Andreas Gottscholl, Vladimir Dyakonov, Milos Toth, Sejeong Kim, Igor Aharonovich
Summary: Color centers in hexagonal boron nitride (hBN) have shown efficient coupling to bullseye cavities, demonstrating a 6.5-fold enhancement in boron vacancy spin defects. Through finite-difference time-domain modeling, emission dipole orientation and enhanced contrast in optically detected magnetic resonance readout have been elucidated. This paves the way for integrating hBN spin defects with photonic resonators for a scalable spin-photon interface.
Article
Engineering, Environmental
Izabo Pereira Meneses, Stephanie Dias Novaes, Rafael Sobral Dezotti, Pedro Vitoriano Oliveira, Denise Freitas Siqueira Petri
Summary: The study investigated the adsorption of MB, Cr(VI), and BPA using modified cryogels CMCBG-CTAB, showing removal capacities of 100%, 70%, and 95% respectively. The presence of synergistic effects in binary or ternary mixtures resulted in increased adsorption of Cr(VI) ions, while the adsorption of MB was significantly reduced in the presence of Cr(VI) ions. The adsorption of BPA was not significantly affected by the presence of MB or Cr(VI). The adsorbents showed good recyclability with no significant efficiency loss after five cycles.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Stephanie Dias Novaes, Pedro Vitoriano Oliveira, Denise Freitas Siqueira Petri
Summary: Adsorbents made of HPMC and BG microparticles were used for the separation of EE2 in batch and fixedbed columns, showing enhanced mechanical properties and stability. However, decreased efficiency was observed when adsorbing EE2 from river water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Biochemistry & Molecular Biology
Alex Carvalho Alavarse, Emilli Caroline Garcia Frachini, Rafael Leonardo Cruz Gomes da Silva, Vitoria Hashimoto Lima, Amin Shavandi, Denise Freitas Siqueira Petri
Summary: Polysaccharides and proteins are essential macromolecules for biomedical hydrogels. Chemical hydrogels, which have chemical bonds mediated by crosslinkers, offer better chemical, mechanical, and dimensional stability compared to physical hydrogels. This review revisits the crosslinking reactions between synthetic or natural crosslinkers and polysaccharides or proteins. It discusses the mechanisms, evaluation methods, and challenges in creating safe chemical hydrogels for biomedical applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Biochemistry & Molecular Biology
Stalin Kondaveeti, Denise F. S. Petri, Hoon Eui Jeong
Summary: This study synthesized alginate/xanthan blend beads and improved their porosity through freeze-drying. The freeze-dried beads showed better adsorption capacity for MB dye compared to air-dried beads. The vertical column system packed with freeze-dried beads exhibited higher adsorption efficiency and maintained a removal efficiency of 91% even after multiple adsorption-desorption cycles.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Green & Sustainable Science & Technology
Laise Moura Furtado, Dairon Perez Fuentes, Romulo Augusto Ando, Pedro Vitoriano Oliveira, Denise Freitas Siqueira Petri
Summary: Low-cost eco-friendly adsorbents, consisting of CMC, PDA, and BG, were developed for water treatment. These biobased adsorbents showed high efficiency in removing Pb2+ ions and other metal ions from wastewater. Their potential application in the treatment of complex wastewater from undergraduate laboratories was demonstrated.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Bruno S. Dario, Rafael Pereira, Denise F. S. Petri
Summary: This study introduces two bulky surfactants for stabilizing commercial TiO2 particles. The results show that the negatively charged surfactant adsorbs more efficiently on TiO2 particles than the uncharged surfactant, providing colloidal stability for the particles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Biomedical
Alex C. Alavarse, Mahta Mirzaei, Amin Shavandi, Denise F. S. Petri
Summary: Bioactive peptides from natural resources have attracted attention for their beneficial biological properties in skin wound healing. Polysaccharides, known for their biocompatibility, biodegradability, and ease of modification, were used as carriers for peptide delivery to wounds. Xanthan hydrogels modified with the peptide VW-9 showed increased swelling and efficient release of the peptide. These modified hydrogels were compatible with fibroblast and macrophage cells, and effectively reduced the levels of inflammatory cytokines in activated cells. Consequently, VW-9-modified xanthan hydrogels hold promise for skin wound healing applications.
BIOMEDICAL MATERIALS
(2023)
Article
Polymer Science
Emilli C. G. Frachini, Jessica S. G. Selva, Paula C. Falcoswki, Jean B. Silva, Daniel R. Cornejo, Mauro Bertotti, Henning Ulrich, Denise F. S. Petri
Summary: CAF was loaded into Gel/Alg/MNP hydrogels to achieve sustained release, and the presence of Ca2+ and EMF enhanced the release of CAF. The released concentration of CAF from Gel/Alg/MNP hydrogels in PBS/CaCl2 at 37°C was 0.35 mM, promoting cell viability.
Article
Chemistry, Applied
Camila Gruber Chiaregato, Oigres Daniel Bernardinelli, Amin Shavandi, Edvaldo Sabadini, Denise Freitas Siqueira Petri
Summary: This study systematically investigated the interactions between HPMC cryogels and water molecules in the presence and absence of a surfactant and CaO2 microparticles. Regardless of the DS and MS, most water molecules exhibited transverse relaxation time t2 typical of intermediate water and a small population of tightly bound water. HPMC cryogels with the highest DS showed the slowest swelling rate and the highest contact angle values, providing the optimal conditions for a slow reaction with CaO2. The presence of surfactant favored hydrophobic interactions, resulting in a higher swelling rate and lower contact angle values.
CARBOHYDRATE POLYMERS
(2023)
Article
Chemistry, Physical
Laise M. Furtado, Marcio Yee, Rodrigo Fernandes, Ticiane S. Valera, Rosangela Itri, Denise F. S. Petri
Summary: The type and concentration of surfactants have an impact on the rheological behavior of HPMC chains in hydrogels, affecting the microstructure and mechanical properties of HPMC cryogels. SDS surfactants can form bead necklaces with HPMC chains, significantly increasing the storage modulus and compressive modulus. AOT surfactants cannot form bead necklaces and result in softer cryogels compared to pure HPMC cryogels.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Alex Carvalho Alavarse, Jean Bezerra Silva, Henning Ulrich, Denise Freitas Siqueira Petri
Summary: Hydrogels of poly(vinyl alcohol) (PVA)/sodium alginate (SA) with randomly distributed magnetic nanoparticles (MNPs) and magnetically oriented MNPs were prepared. Atomic force microscopy (AFM) and magnetic force microscopy (MFM) were used to evaluate the topography and magnetic domains distribution. The results showed that the orientation of magnetic domains led to an increase of surface roughness, which decreased the viability of HT-22 cells. These findings are important for situations where control of cell proliferation is necessary.
Article
Engineering, Environmental
Mario A. B. S. Nunes, Dairon P. Fuentes, Jose A. F. S. Mesquita, Roberto C. O. Romano, Rafael G. Pileggi, Pedro V. Oliveira, Denise F. S. Petri
Summary: This study successfully removed Cr(VI) ions from wastewater using sugarcane bagasse/polydopamine adsorbents and incorporated the spent adsorbents into cement, demonstrating a sustainable management of liquid and solid wastes.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2023)
Article
Chemistry, Applied
Alex Carvalho Alavarse, Emilli Caroline G. Frachini, Jean Bezerra Silva, Rafael dos Santos Pereira, Henning Ulrich, Denise Freitas Siqueira Petri
Summary: In this study, citric acid was used as a mediator for the crosslinking and grafting of xanthan gum (XG) chains with amino acids. The coatings showed favorable surface energy and cell adhesion properties.
CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Douglas L. Fritzen, Elaine A. de Mattos, Denise F. S. Petri, Veronica C. Teixeira, Everton Bonturim, Lucas C. Rodrigues
Summary: This study demonstrates the production of translucent flexible persistent composites based on Sr2MgSi2O7:Eu2+,Dy3+ and their potential applications in enhancing technologies with persistent luminescence and high transmittance.
DALTON TRANSACTIONS
(2022)
Article
Cell & Tissue Engineering
Ana T. Semeano, Fabiano A. Tofoli, Juliana C. Correa-Velloso, Ana P. de Jesus Santos, Agatha Oliveira-Giacomelli, Rafaela R. Cardoso, Mateus A. Pessoa, Edroaldo Lummertz da Rocha, Gustavo Ribeiro, Merari F. R. Ferrari, Lygia Pereira, Yang D. Teng, Denise F. S. Petri, Henning Ulrich
Summary: This study investigated the effects of magnetic nanoparticles and external magnetic fields on neural induction of pluripotent stem cells. The presence of magnetic nanoparticles facilitated cell migration and neuronal maturation, while the application of magnetic fields stimulated cell proliferation and fate decisions, depending on the origin and developmental stage of the stem cells. Mechanistic analysis revealed the modulation of ionic homeostasis and proteins involved in cytostructural, liposomal, and cell cycle checkpoint functions as the underlying mechanisms. These findings highlight the potential of magnetic stimulation for neural differentiation and function modulation, as well as the risks associated with excessive stimulation.
STEM CELL REVIEWS AND REPORTS
(2022)
