Article
Construction & Building Technology
Peiqi Li, Junxing Liu, Heongwon Suh, Erfan Zal Nezhad, Sungchul Bae
Summary: This study investigated the enhancement effect of a synthesized GNFG complex on the fire resistance of cementitious composites, comparing it with traditional nano-reinforcements CNTs and GO. The results showed that GNFG exhibited good dispersion and thermal stability, promoting hydration of the cement and improving its microstructure and mechanical properties. These findings suggest that GNFG can serve as a novel nano-reinforcing agent to enhance the mechanical properties and fire resistance of cementitious materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Alina Iuliana Pruna, Alfonso Carcel, Adolfo Benedito, Enrique Gimenez
Summary: Innovative dendrimer-modified graphene oxide (GO) aerogels were synthesized using generation 3.0 poly(amidoamine) (PAMAM) dendrimer and a combined synthesis approach. The properties of modified aerogels were investigated and evaluated, showing a strong correlation between N content and PAMAM/CNT ratio. The CO2 adsorption performance on the modified aerogels increased with dendrimer concentration at an appropriate PAMAM/CNT ratio, reaching a value of 2.23 mmol g(-1) at a PAMAM/CNT ratio of 0.6/0.12 (mg mL(-1)). The results suggest that CNTs can be used to improve the functionalization/reduction degree in PAMAM-modified GO aerogels for CO2 capture.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Peiqi Li, Junxing Liu, Sungwun Her, Erfan Zal Nezhad, Seungmin Lim, Sungchul Bae
Summary: In this study, a graphene oxide nanoribbons-functionalized carbon nanotubes-graphene oxide (GNFG) complex was synthesized and used as a nanomaterial for reinforcing cementitious composites. The highly-dispersed GNFG showed improved mechanical properties of cement paste and promoted the hydration of cement compared to other typical carbon nanomaterials. The results validate the feasibility of using GNFG with enhanced dispersion as a new nano-reinforcing agent for various cementitious systems.
Article
Physics, Applied
S. Ihnatsenka
Summary: Quantum-mechanical calculations of electron transport in ideal graphene nanoribbons show that the transport gap predicted by noninteracting theories vanishes when the long-range Coulomb interaction between electrons is considered. However, the gap reappears if a ribbon is connected to wider leads, typically in experimental setups using lithographically patterned graphene ribbons. The gap is determined by scattering at the lead-to-ribbon interface, which can be captured by noninteracting theory.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Yafei Wang, Pan Wang, Ziran Du, Chuntai Liu, Changyu Shen, Yaming Wang
Summary: This article investigates the fabrication of conductive polymer composites with segregated networks using a simple strategy based on the addition of PEO. The effects of CNTs and GNPs on the electrical conductivity and EMI shielding properties of different structures were compared, showing higher effectiveness in segregated structure.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Suresh Kumar, Twinkle, Manpreet Kaur
Summary: The study demonstrates a facile method to prepare highly conductive graphene nanoribbons via microwave treatment of acid processed carbon nanotubes, which is an important step towards the development of GNR based electronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Bosai Lyu, Jiajun Chen, Shuo Lou, Can Li, Lu Qiu, Wengen Ouyang, Jingxu Xie, Izaac Mitchell, Tongyao Wu, Aolin Deng, Cheng Hu, Xianliang Zhou, Peiyue Shen, Saiqun Ma, Zhenghan Wu, Kenji Watanabe, Takashi Taniguchi, Xiaoqun Wang, Qi Liang, Jinfeng Jia, Michael Urbakh, Oded Hod, Feng Ding, Shiyong Wang, Zhiwen Shi
Summary: Graphene nanoribbons (GNRs) are promising materials for future nanoelectronic applications, but growing long GNRs on insulating substrates remains a challenge. This study reports the successful epitaxial growth of micrometer-long GNRs on an insulating substrate using nanoparticle-catalyzed chemical vapor deposition.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Yifan Zhang, Kecheng Cao, Takeshi Saito, Hiromichi Kataura, Hans Kuzmany, Thomas Pichler, Ute Kaiser, Guowei Yang, Lei Shi
Summary: This study investigated the diameter-dependent synthesis of GNRs using SWCNTs of different average diameters, and found that the width of GNRs can be tailored by the diameter of SWCNTs. Particularly, SWCNTs with an average diameter of 1.3 nm produced the highest yield of 6 and 7 armchair GNRs, indicating potential for high-yield production of certain GNRs in large scale applications.
Review
Materials Science, Biomaterials
Siyu Luo, Xi Chen, Yihan He, Yingqiu Gu, Chengzhou Zhu, Guo-Hai Yang, Lu-Lu Qu
Summary: Graphene nanoribbons (GNRs), a new type of quasi-one-dimensional graphene-based material, have unique properties and wide applications, especially in electronics and biomedical fields. Despite challenges in the synthesis and application of functionalized GNRs, they hold significant practical promise in various biomedical applications in the future.
JOURNAL OF MATERIALS CHEMISTRY B
(2021)
Article
Polymer Science
Thamires Santos da Silva, Bianca de Oliveira Horvath-Pereira, Leandro Norberto da Silva-Junior, Joao Victor Barbosa Tenorio Fireman, Michel Mattar, Marcilio Felix, Rogerio Leone Buchaim, Ana Claudia Oliveira Carreira, Maria Angelica Miglino, Marcelo Melo Soares
Summary: This study characterizes the properties of GO/PLLA-printed scaffolds and demonstrates their potential applications in fields such as bone tissue engineering and implants. The research findings indicate that the GO/PLLA nanocomposites are not cytotoxic and the printed scaffolds exhibit good reproducibility.
Article
Chemistry, Physical
Fatemeh Mazhari Mousavi, Rouhollah Farghadan
Summary: This study investigates the influence of electric fields on the spin-dependent thermoelectric properties of graphene nanoribbons with asymmetric zigzag edge extensions. The results show that the electric field significantly reduces the spin gap and lowers the threshold temperature, while inducing higher spin currents in the nanoribbons.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Review
Physics, Applied
Haomin Wang, Hui Shan Wang, Chuanxu Ma, Lingxiu Chen, Chengxin Jiang, Chen Chen, Xiaoming Xie, An-Ping Li, Xinran Wang
Summary: Graphene nanoribbons, as a family of one-dimensional materials with a graphitic lattice structure, have shown high mobility, current-carrying capability, and versatile electronic properties, making them promising candidates for quantum electronic applications. Recent progress has been made in the atomically precise bottom-up synthesis of GNRs and heterojunctions, as well as in the production of semiconducting GNR arrays on insulating substrates, indicating a potential for large-scale digital circuits. In the near future, GNRs could become competitive candidate materials in quantum information sciences.
NATURE REVIEWS PHYSICS
(2021)
Article
Mechanics
S. K. Nevhal, S. Kundalwal
Summary: This study demonstrates the mechanism of strain-induced polarization in defective armchair graphene nanoribbons (AGNRs) using first-principles calculations. The research reveals that polarization can be engineered in graphene by changing the pore/defect symmetry and concentration.
Article
Engineering, Biomedical
Yu Gu, Fenyan Miao, Kejun Liu, Yimeng Su, Yan Wei, Yinchun Hu, Xiaojie Lian, Weimo Han, Weiyi Chen, Di Huang
Summary: In this study, a conductive hydrogel was prepared using gelatin methacryloyl (GelMA) and graphene oxide (GO) by adjusting their concentrations during the cross-linking process. The addition of 0.1% GO improved the mechanical properties of the hydrogel to 16.37 +/- 1.89 KPa, while the conductivity increased to 1.36 +/- 0.09 mu S/cm. Mineralization of the hydrogel significantly enhanced its mechanical properties to 26.38 +/- 2.29 KPa. Cell experiments demonstrated that electrical stimulation of the mineralized hydrogel improved the alkaline phosphatase activity of the cells. GelMA/GO conductive hydrogel shows promise for bone repair and tissue engineering.
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
(2023)
Review
Chemistry, Multidisciplinary
Maria G. Burdanova, Marianna Kharlamova, Christian Kramberger, Maxim P. Nikitin
Summary: This review comprehensively describes the chemical functionalization routes and applications of carbon nanomaterials, highlighting methods to improve their functionalities and discussing their applications in bioimaging, drug delivery, and biosensors. Additionally, toxicity studies and future directions for development are presented.
Review
Biochemistry & Molecular Biology
Samson Afewerki, Thiago Domingues Stocco, Andre Diniz Rosa da Silva, Andre Sales Aguiar Furtado, Gustavo Fernandes de Sousa, Guillermo U. Ruiz-Esparza, Thomas J. Webster, Fernanda R. Marciano, Maria Stromme, Yu Shrike Zhang, Anderson Oliveira Lobo
Summary: Precision medicine allows for tailored treatments, improving the efficiency and accuracy of disease prevention, diagnosis, and treatment. The combination of organ-on-a-chip and bioprinting can address precision medicine challenges and be utilized in the current COVID-19 pandemic for efficient diagnostics and treatments. This convergence enables advances in tools and in vitro models for personalized and faster screening of therapeutics.
MOLECULAR ASPECTS OF MEDICINE
(2023)
Article
Biochemistry & Molecular Biology
Alessandra R. Freitas, Antonio J. Ribeiro, Alessandra B. Ribeiro, Maria Del Mar Collado-Gonzalez, Luis R. Silva, Luis Alves, Elodie Melro, Filipe E. Antunes, Francisco Veiga, Alan I. S. Morais, Roosevelt D. S. Bezerra, Jose L. Soares-Sobrinho, Josy A. Osajima, Edson C. Silva-Filho
Summary: The present work aimed to modify the exuded gum of Sterculia striata tree through an amination reaction. The viscosity and zero potential of the chicha gum varied with pH. The modification was confirmed by various analytical techniques, and the modified gum showed increased mucoadhesive and inhibitory activity against Staphylococcus aureus, as well as antioxidant capacity and inhibitory effect against alpha-glucosidase.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Idglan Sa de Lima, Maria Onaira Goncalves Ferreira, Esmeralda Maria Lustosa Barros, Marcia dos Santos Rizzo, Jailson de Araujo Santos, Alessandra Braga Ribeiro, Josy Anteveli Osajima Furtini, Edson C. Silva-Filho, Leticia M. Estevinho
Summary: Chicha gum, obtained from the Sterculia striata plant, is a natural polymer with the ability to form hydrogels due to its hydroxyl groups. These hydrogels can associate with biologically active molecules and enhance their properties for drug delivery systems. The hydrogels produced in this study, associated with nerolidol, exhibited antibacterial activity and were effective in wound healing, making them potential products for wound treatment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Robson V. Cunha, Alan I. S. Morais, Pollyana Trigueiro, Joao Sammy N. de Souza, Dihego H. L. Damacena, Luciano C. Brandao-Lima, Roosevelt D. S. Bezerra, Maria Gardennia Fonseca, Edson C. Silva-Filho, Josy A. Osajima
Summary: This study aims to use cetyltrimethylammonium bromide in bentonite clay to produce materials for incorporating and photostabilizing anthocyanin dye, overcoming its limitations in light, pH, oxygen, and temperature conditions. The results showed that the organic molecules were intercalated between the clay mineral layers and the dye was successfully incorporated at different pH levels. Visible light-driven photostability tests confirmed the efficiency of the organic-inorganic matrices in stabilizing the quinoidal base form of anthocyanin. The pigment prepared at pH 10 was three-fold more stable than at pH 4, indicating that a higher synthesis pH promotes more stable colors due to stronger intermolecular interaction.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Tainara G. Oliveira, Yuset Guerra, Suzana Araujo-Barbosa, Suziete B. S. Gusmao, Anderson O. Lobo, Edson C. Silva-Filho, Francisco Eroni P. Santos, R. Pena-Garcia, Bartolomeu C. Viana
Summary: Transition magnetic metals (Fe, Ni, Co) were inserted into sodium titanate nanotubes and subjected to calcination. The calcination process caused breakdown of the nanotubular structure at 400 degrees C and formation of TiO2 nanoparticles, mainly in the anatase and rutile phases, at 800 degrees C. The insertion of Fe3+, Ni2+ and Co2+ ions promoted red shift in UV-Vis and smaller energy gap compared to NaTiNT. Additionally, the samples calcined at 400 degrees C exhibited higher conductivity and all samples showed ferromagnetic behavior at room temperature.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Physics, Multidisciplinary
Francilio Vieira Aguiar, Daniel Roger Bezerra Amorim, Rafael Marinho Bandeira, Iran da Silva Guimaraes, Aldo Eloizo Job, Deuber Agostini, Maria Leticia Vega, Helder Nunes da Cunha
Summary: In this study, self-standing films composed of polyaniline (PANI) and cashew nut shell liquid (t-CNSL) were characterized using various techniques. The addition of t-CNSL improved the roughness, thermal stability, and conductivity of the films. Chemical interactions between PANI and t-CNSL were observed, and t-CNSL acted as both a plasticizer and a dopant agent in the films. These findings provide an environmentally friendly method for enhancing the conductivity of PANI-based films.
BRAZILIAN JOURNAL OF PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Paloma Nayra da Silva Lima, Anupama Ghosh, Ariane Nascimento, Lais Helena Sousa Vieira, Rubens Silva Costa, Odair Pastor Ferreira, Guilherme J. P. Abreu, Kazunori Fujisawa, Edson Cavalcanti Silva-Filho, Antonio Gomes Souza Filho, Anderson Oliveira Lobo, Mauricio Terrones, Bartolomeu Cruz Viana
Summary: Activated carbon (AC) was synthesized from babassu mesocarp through thermal pre-treatments and potassium hydroxide activation, resulting in ACs with varied structure and surface properties. The ACs exhibited low structural order, high specific surface area, micropores, mesopores, and negatively charged surface oxygen functional groups, making them potential adsorbents for cationic chemical species. The adsorption of methylene blue cationic dye on the ACs, driven by Coulombic interaction and diffusion, demonstrated fast and efficient dye uptake, making them renewable and sustainable adsorbents.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Francileia Nogueira Albino Calland, Guilherme de Castro Brito, Gustavo Fernandes de Sousa, Francilio de Carvalho Oliveira, Fernanda Roberta Marciano, Anderson Oliveira Lobo
Summary: New strategies are needed for developing bandages that can improve wound healing in diabetic patients. In this study, we fabricated multifunctional bandages using electrospinning and surface functionalization techniques, and then evaluated their performance in regenerating skin tissue using a diabetes animal model. The bandages showed excellent tissue integration, as indicated by fibroblast adhesion and the formation of mature collagen (type I). These biomaterials developed by our research group have been successfully utilized in various biomedical applications.
Article
Materials Science, Coatings & Films
Luciana Mendes Ribeiro de Sousa, Moises das Virgens Santana, Bruno Pereira da Silva, Thays Oliveira Marques, Ramon Pena-Garcia, Angel Alberto Hidalgo, Maria Leticia Vega, Bartolomeu Cruz Viana, Thiago Domingues Stocco, Luana Marotta Reis de Vasconcellos, William Chiappim, Rodrigo Savio Pessoa, Fernanda Roberta Marciano, Anderson Oliveira Lobo
Summary: By using Atomic Layer Deposition (ALD) and simulated body fluid method, Ti6Al7Nb alloy was modified with Al2O3 and coated with apatite. Various techniques including X-Ray Fluorescence (FRX), Energy Scattering X-Ray Spectroscopy (EDS), Scanning Electron Microscopy (SEM), X-Ray Diffraction Spectroscopy (XRD), Raman Spectroscopy, and Atomic Force Microscopy (AFM) were used to determine the chemical and crystallographic composition of Ti6Al7Nb before and after surface modifications. The results showed that the surface modifications improved the bioactivity of the titanium alloy by promoting the formation of microporosity and influencing the nucleation of apatite at the nanoscale. These nanofilms were found to be non-cytotoxic, making them promising for tissue engineering applications.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Gelson L. C. Rodrigues, Tainara G. de Oliveira, Suziete B. S. Gusmao, Odair P. Ferreira, Thiago L. Vasconcelos, Yuset Guerra, Raquel Milani, Ramon Pena-Garcia, Bartolomeu C. Viana
Summary: Titanate nanotubes were synthesized and exchanged with erbium ions through an ion exchange reaction. The effects of thermal treatment atmosphere on the structural and optical properties of erbium titanate nanotubes were evaluated. It was found that the morphology of the nanotubes was preserved with the presence of erbium oxide phases. The dimensions of the samples were varied by ion exchange and thermal treatment, which also affected the optical properties. The results suggest the potential applications of thermally treated erbium titanate nanotubes in optoelectronics and photonics.
Article
Green & Sustainable Science & Technology
Dhiessica Morgana Alves Barros, Ricardo Loiola Edvan, Joao Paulo Matos Pessoa, Romilda Rodrigues do Nascimento, Luan Felipe Reis Camboim, Leilson Rocha Bezerra, Marcos Jacome de Araujo, Heldeney Rodrigues de Sousa, Edson C. Silva-Filho
Summary: This study evaluated the replacement of synthetic hydrogels with biodegradable hydrogels in Mombaca grass pastures. The results showed that biodegradable hydrogels can improve the leaf elongation rate and green leaf mass yield, but had no significant effect on the chemical composition. The use of biodegradable hydrogels also increased the zinc content in the grass.
Article
Green & Sustainable Science & Technology
Anderson Lopes, Francisca P. Araujo, Dihego Damasceno, Luzia M. C. Honorio, Alan I. S. Morais, Luciano C. Almeida, Ramon Pena Garcia, Edson C. Silva-Filho, Marcelo B. Furtini, Josy A. Osajima
Summary: This study explores the use of photocatalysis for degrading pollutants in water treatment. TiO2/Arabic gum catalysts were synthesized using the sol-gel method, and their photocatalytic properties were investigated. The synthesized TiO2/Arabic gum nanoparticles showed promising results in terms of photocatalytic performance.
Article
Environmental Sciences
Andre Luiz Ferreira Carvalho Melo, Marcelo Teixeira Carneiro, Alan Icaro Sousa Morais, Bartolomeu Cruz Viana, Francisco Eroni Paz Santos, Josy Anteveli Osajima, Roosevelt D. S. Bezerra, Ramon Raudel Pena-Garcia, Luciano C. Almeida, Santiago Medina Carrasco, Edson C. Silva-Filho
Summary: Water pollution is a global problem, and this study focused on developing a new technology using activated biochar from pequi almonds for dye removal. The activated biochar showed higher adsorption capacity compared to the original biochar, due to its increased cracks and pores. The study found that the adsorption kinetics followed a pseudo-second-order model, and the Langmuir model described the adsorption isotherms. This research demonstrates the potential application of activated biochar for dye removal in aqueous environments.
Article
Materials Science, Biomaterials
Mohammadreza Kasravi, Alireza Yaghoobi, Tahereh Tayebi, Mahsa Hojabri, Abdolkarim Talebi Taheri, Fatemeh Shirzad, Bahram Jambar Nooshin, Radman Mazloomnejad, Armin Ahmadi, Fatemeh A. Tehrani, Ghasem Yazdanpanah, Mohammad Hadi Farjoo, Hassan Niknejad
Summary: As a promising approach in translational medicine, the decellularization of discarded livers to produce bioscaffolds that support recellularization has potential in overcoming the limitations of conventional liver transplantation. In this study, the researchers investigated the use of matrix metalloproteinase (MMP) inhibition to preserve the extracellular matrix (ECM) during liver decellularization. The results demonstrated that the application of an MMP inhibitor significantly improved the preservation of ECM components and mechanical properties of the bioscaffolds, which supported cell viability and function in vitro. The study also confirmed that the MMP inhibition led to the inhibition of MMP2 and MMP9, providing a novel method to enhance ECM preservation during liver decellularization.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Mohammadsadegh Nadimifar, Weiguang Jin, Clara Coll-Satue, Gizem Bor, Paul Joseph Kempen, Ali Akbar Moosavi-Movahedi, Leticia Hosta-Rigau
Summary: This study presents a metal-phenolic self-assembly approach that can prepare nanoparticles fully made of hemoglobin. The nanoparticles exhibit good oxygen binding and releasing capabilities.
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jyoti Kumari, Roel Hammink, Jochem Baaij, Frank A. D. T. G. Wagener, Paul H. J. Kouwer
Summary: Fibrosis is the formation of fibrous connective tissue in response to injury, leading to organ dysfunction. A novel hybrid hydrogel combining synthetic polyisocyanide with hyaluronic acid has been developed, showing strong antifibrotic properties.
BIOMATERIALS ADVANCES
(2024)
Letter
Materials Science, Biomaterials
Melissa Machado Rodrigues, Cristian Padilha Fontoura, Charlene Silvestrin Celi Garcia, Sandro Tomaz Martins, Joao Antonio Pegas Henriques, Carlos Alejandro Figueroa, Mariana Roesch Ely, Cesar Aguzzoli
BIOMATERIALS ADVANCES
(2024)
Article
Materials Science, Biomaterials
Jessica Polak, David Sachs, Nino Scherrer, Adrian Suess, Huan Liu, Mitchell Levesque, Sabine Werner, Edoardo Mazza, Gaetana Restivo, Mirko Meboldt, Costanza Giampietro
Summary: Human skin equivalents (HSEs) play a crucial role in tissue engineering. This study introduces a 3D-printed culture insert to apply a static radial constraint on HSEs and examines its effects on tissue characteristics. The results show that the diameter of the culture insert significantly influences tissue contraction, fibroblast and matrix organization, keratinocyte differentiation, epidermal stratification, and basement membrane formation. This study provides important insights for the design of skin tissue engineering.
BIOMATERIALS ADVANCES
(2024)
Review
Materials Science, Biomaterials
Shiliang Chen, Tianming Du, Hanbing Zhang, Jing Qi, Yanping Zhang, Yongliang Mu, Aike Qiao
Summary: This paper reviewed the primary methods for improving the overall properties of biodegradable zinc stents. It discussed the mechanical properties, degradation behavior, and biocompatibility of various improvement strategies. Alloying was found to be the most common, simple, and effective method for improving mechanical properties. Deformation processing and surface modification further improved the mechanical properties and biological activity of zinc alloys. Meanwhile, structural design could endow stents with special properties. Manufacturing zinc alloys with excellent properties and exploring their interaction mechanism with the human body are areas for future research.
BIOMATERIALS ADVANCES
(2024)