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        <title>Frontiers in Carbon | Carbon-Based Objects and Devices section | New and Recent Articles</title>
        <link>https://www.frontiersin.org/journals/carbon/sections/carbon-based-objects-and-devices</link>
        <description>RSS Feed for Carbon-Based Objects and Devices section in the Frontiers in Carbon journal | New and Recent Articles</description>
        <language>en-us</language>
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        <pubDate>2026-05-13T22:46:22.818+00:00</pubDate>
        <ttl>60</ttl>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frcrb.2026.1720673</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frcrb.2026.1720673</link>
        <title><![CDATA[Cd(II) adsorption from aqueous solution using pristine and activated Melocanna baccifera biochar: isotherm and kinetics studies]]></title>
        <pubdate>2026-04-20T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>H. Lalhruaitluanga</author><author>K. Lalchawiliana</author><author>Laltlankimi Khiangte</author><author>Tongbram Punshi Singh</author><author>Lalremruata Hauhnar</author>
        <description><![CDATA[Bamboo biochar is effective at adsorbing a wide range of heavy metals and is relatively stable under environmental conditions. Cadmium contamination in aquatic systems poses a significant risk to environmental and human health, creating a need for efficient, low-cost adsorbents for water treatment. In this study, pristine and chemically activated biochars derived from M. baccifera bamboo were evaluated for Cd(II) removal from aqueous solution. The objective was to investigate the effect of chemical activation on adsorption performance and to elucidate the adsorption mechanisms using equilibrium and kinetic analyses. Biochar was activated using various concentrations of potassium hydroxide (KOH) and phosphoric acid (H3PO4). Among the tested methods, activation with 60% KOH demonstrated the highest adsorption efficiency, leading to its selection for further characterization and adsorption studies. Batch experiments revealed that the adsorption process is significantly influenced by pH, with optimal removal observed at pH 5. The equilibrium data were best represented by the Langmuir isotherm, indicating maximum adsorption capacities of 15.15 mg/g for pristine biochar and 24.39 mg/g for activated biochar. Kinetic analysis indicated that the adsorption kinetics conform to the Pseudo-second-order model, with Intraparticle diffusion and liquid-film diffusion identified as contributing factors in the rate-controlling steps. Fourier-transform infrared (FTIR) spectroscopy analysis showed shifts in the O-H, C=O, and C-O functional groups. These changes suggest that surface complexation and ion exchange are the primary mechanisms involved in the binding of cadmium ions. The results of this study demonstrate that KOH activation significantly improves the physicochemical properties and adsorption performance of bamboo biochar. This research highlights the potential of activated biochar derived from Melocanna baccifera as a sustainable and locally available adsorbent for the removal of cadmium from contaminated water. This also supports its potential application in cost-effective water purification systems.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frcrb.2024.1363919</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frcrb.2024.1363919</link>
        <title><![CDATA[Biodistribution of intravenously delivered PEGylated carbon nanotubes to the rat brain cortex]]></title>
        <pubdate>2025-01-03T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Gisele Eva Bruch</author><author>Lidiane Dal Bosco</author><author>Arthur P. Cordeiro</author><author>Marcos F. Cordeiro</author><author>Sangram K. Sahoo</author><author>Carolina Peixoto</author><author>Marta C. Klosterhoff</author><author>Luis Alberto Romano</author><author>Cristiano Fantini</author><author>Adelina P. Santos</author><author>Daniela M. Barros</author>
        <description><![CDATA[Polyethylene glycol-functionalized single-walled carbon nanotubes (SWCNT-PEG) have been studied for many biomedical applications because of their unique physicochemical properties. Due to their reduced size and high stability in physiological media, SWCNT-PEG are candidates for crossing the blood–brain barrier (BBB), with potential use in treating central nervous system diseases that are currently unresponsive to pharmacological interventions because of the tightly regulated permeability of the BBB. In this study, we investigated the biodistribution of intravenously delivered SWCNT-PEG using Raman spectroscopy, as well as possible toxicological outcomes using morphological, histological, biochemical, and behavioral analyses. SWCNT-PEG were identified in the brain cortex, blood, spleen, and liver of rats. Biochemical and histological analyses did not reveal toxic effects in rats 24 h after SWCNT-PEG injection. Additionally, no behavioral impairments were observed in treated animals subjected to the Morris water maze task. Our preliminary experimental results clearly indicate that SWCNT-PEG were able to cross biological membranes and reach the rat brain cortex parenchyma (but not other brain structures) after systemic administration without the presence of acute toxic effects. The biodistribution of SWCNT-PEG in a specific region of the brain tissue encourages further studies regarding the application of SWCNTs in neuroscience.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frcrb.2024.1339418</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frcrb.2024.1339418</link>
        <title><![CDATA[Carbon nanotube filled rubber nanocomposites]]></title>
        <pubdate>2024-05-08T00:00:00Z</pubdate>
        <category>Review</category>
        <author>Nimita K. C</author><author>Jiji Abraham</author><author>Martin George Thomas</author><author>Henri Vahabi</author><author>Hanna J. Maria</author><author>Sabu Thomas</author>
        <description><![CDATA[Rubber (elastomer) based polymer nanocomposites have attracted wide range of attention from industries and other fields due to its exceptionally good mechanical, thermal and electrical properties. One of the promising candidates of this category is CNT filled rubber nanocomposites. This review throws light on the historical trajectory of development of CNT filled rubber nanocomposites. Various fabrication methods, detailed explanation of reinforcement mechanism in CNT/rubber nanocomposites and the relationship between the structure and properties are reviewed. The next part of the review discusses about the morphological and interface characteristics. An attempt to investigate the versatile mechanical, thermal, and electrical properties also included in the review. The final part of the review includes the applications of CNT filled rubber nanocomposites. Major applications in fields like electronics, sustainable biomedical and EMI shielding are discussed in detail. The review also focuses on the key challenges that arises while incorporating CNTs into rubber matrices.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frcrb.2024.1352122</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frcrb.2024.1352122</link>
        <title><![CDATA[Mechanisms of methanol detection in graphene oxide and conductive polymer active layers for gas sensing devices]]></title>
        <pubdate>2024-02-02T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Matheus F. F. das Neves</author><author>Shardul Mukim</author><author>Mauro S. Ferreira</author><author>Lucimara S. Roman</author>
        <description><![CDATA[The admixture of PEDOT:PSS with Graphene Oxide (GO) in precise proportions achieves a substantial reduction in electrical resistivity, thereby augmenting its suitability as an electrode in organic devices. This study explores the electrical and morphological attributes of commercial PEDOT:PSS and chemically synthesized aqueous PEDOT ink when both are combined with GO. The investigation extends to the application of these conductive inks as active layers in flexible methanol sensing devices. Notably, a resistivity minimum is observed in the case of GO:PEDOT:PSS 78%, while the highest response to methanol is attained with GO:PEDOT:PSS 68%. To establish a theoretical underpinning for these findings, and to understand the interaction between gas/vapors with nanostructured materials, a model rooted in Kirchhoff’s Circuit approach is developed, with the aim of elucidating the factors behind the resistivity minimum and response maximum at distinct specific mass ratios between PEDOT and GO. Calculating the equivalent resistivity and response of the systems, the positions of minimum and maximum points are in agreement with the experimental data. Furthermore, the influence of PSS in the samples is examined, unveiling diverse interaction mechanisms between methanol molecules and the active layer, resulting in varying signals during the exposure to alcoholic vapor. The theoretical model is subsequently applied to these systems, demonstrating qualitative and quantitative agreement with the experimental results.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frcrb.2023.1300811</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frcrb.2023.1300811</link>
        <title><![CDATA[Carbon dots-based fluorescent films to act as a potential antioxidant agent and pH ratiometric sensor for skin applications]]></title>
        <pubdate>2023-12-13T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Livia E. Da Silva</author><author>Anna Paula de L. Araujo</author><author>James Henrique Almeida</author><author>Ledja. B. O. D. de Vasconcelos</author><author>Messias de O. Silva</author><author>Dimas. J. P. Lima</author><author>Rodrigo da S. Viana</author><author>Jamylle N. de S. Ferro</author><author>Marília O. F. Goulart</author><author>Jadriane A. Xavier</author><author>Cintya. D. A. E. S. Barbosa</author>
        <description><![CDATA[The wound healing process is accompanied by changes in pH values. Monitoring this physicochemical parameter can indicate the effectiveness of the applied treatment and act as early identification of wound infection. This study focuses on the development of a fluorescent film-based polyvinyl alcohol (PVA) and carbon dots (CDs) derived from lemon bagasse (CD-L) and ortho-phenylenediamine (CD-oPD) named to act as antioxidants and potential ratiometric fluorescent pH sensors, in wound applications. The I460/I550 intensity ratio, as a function of pH value for the dual-system CDs prepared from the mixture of CD-L and CD-oPD, named CD-L/oPD, was investigated. The fit corresponded to a sigmoidal function in the pH range of 5–10, with a relationship having a r2 = 0.992. The variation in the values of the I460/I550 ratio allows for the visualization of the color change from yellowish-green to green with increasing pH. Through a simulated ex vivo pig skin model, it was possible to note that the films prepared from mixed of the CD-L and CD-oPD carbon dots incorporated in a matrix PVA named CD-L/oPD-F was more efficient at visually discriminating color in relation to changes in pH than the films prepared from both individual CD-L (CD-L-F) and CD-oPD (CD-oPD-F) carbon dots. CD-L and CD-oPD demonstrated antioxidant capacity against reactive oxygen species (ROS). The IC50 values for CD-L and CD-oPD were 56.7 and 39.5 μg mL−1 in the DPPH● inhibition assay, and 25.1 and 63.4 μg mL−1 in the HOCl scavenging one, respectively. MTT viability assays using human non-tumoral skin fibroblast (HFF-1) cell showed a cell survival rate of over 80% for both CDs up to a concentration of 1,000 μg mL−1. Finally, the developed films can act in a bifunctional way, by monitoring healing through pH changes and by acting as an antioxidant agent in the treatment of wounds.]]></description>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/frcrb.2023.1288912</guid>
        <link>https://www.frontiersin.org/articles/10.3389/frcrb.2023.1288912</link>
        <title><![CDATA[Recent advances in carbon nanotube patterning technologies for device applications]]></title>
        <pubdate>2023-10-03T00:00:00Z</pubdate>
        <category>Mini Review</category>
        <author>Yoosuk Kim</author><author>Irma Kuljanishvili</author>
        <description><![CDATA[Carbon nanotubes (CNTs) have gained significant attention in the scientific and technology sectors due to their exceptional physical, chemical, and electronic properties. These qualities make them excellent candidates for several electronic applications, such as ballistic conduction, high current densities, low power consumption, outstanding single-photon capacity, and excellent nano-mechanical resonators. However, incorporating CNTs into specific micro- and nano-architectures and hybrid structures remains challenging. Developing fabrication and patterning technologies, involving CNTs, that can scale up while utilizing their exceptional properties has received significant attention in the last two decades. Various approaches have been investigated, including top-down and bottom-up methods, and new techniques have been used to achieve selective CNTs production through patterning. The continued developments of patterning technologies is critical for fully exploiting CNTs’ practical applicability. This mini-review looks at recent advances in fabrication and patterning of CNTs with micro- and nanoscale resolution, such as using pre-patterned substrates, dielectrophoresis, oxidative etching, and selective production and growth for CNTs, or direct printing of CNT-containing inks, etc. Article discusses advantages and limitations of various approaches for achieving accurate and scalable CNT patterning. Overcoming fabrication challenges will pave the way for a widespread use of CNTs in various applications including electronics, photonics, mechanical and biomedical devices and hybrid systems, etc.]]></description>
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