VIVIANE SILVA VALLADAO

Mrs. VIVIANE SILVA VALLADAO

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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27 February 2024 in Materials
Verified
Journal Article
Open access
PDF file
Fernando Gomes Souza JrFernando Gomes Souza Jr
Fernando Gomes Souza Jr
SBShekhar Bhansali
Shekhar Bhansali
Kaushik PalKaushik Pal
Kaushik Pal
FMFabíola da Silveira Maranhão
Fabíola da Silveira Maranhão
Marcella Santos MoreiraMarcella Santos Moreira
Marcella Santos Moreira
GSGabriel Bezerra Silva
Gabriel Bezerra Silva
From 1990 to 2024, this study presents a groundbreaking bibliometric and sentiment analysis of nanocomposite literature, distinguishing itself from existing reviews through its unique computational methodology. Developed by our research group, this novel approach systematically investigates the evolution of nanocomposites, focusing on microstructural characterization, electrical properties, and mechanical behaviors. By deploying advanced Boolean search strategies within the Scopus database, we achieve a meticulous extraction and in-depth exploration of thematic content, a methodological advancement in the field. Our analysis uniquely identifies critical trends and insights concerning nanocomposite microstructure, electrical attributes, and mechanical performance. The paper goes beyond traditional textual analytics and bibliometric evaluation, offering new interpretations of data and highlighting significant collaborative efforts and influential studies within the nanocomposite domain. Our findings uncover the evolution of research language, thematic shifts, and global contributions, providing a distinct and comprehensive view of the dynamic evolution of nanocomposite research. A critical component of this study is the “State-of-the-Art and Gaps Extracted from Results and Discussions” section, which delves into the latest advancements in nanocomposite research. This section details various nanocomposite types and their properties and introduces novel interpretations of their applications, especially in nanocomposite films. By tracing historical progress and identifying emerging trends, this analysis emphasizes the significance of collaboration and influential studies in molding the field. Moreover, the “Literature Review Guided by Artificial Intelligence” section showcases an innovative AI-guided approach to nanocomposite research, a first in this domain. Focusing on articles from 2023, selected based on citation frequency, this method offers a new perspective on the interplay between nanocomposites and their electrical properties. It highlights the composition, structure, and functionality of various systems, integrating recent findings for a comprehensive overview of current knowledge. The sentiment analysis, with an average score of 0.638771, reflects a positive trend in academic discourse and an increasing recognition of the potential of nanocomposites. Our bibliometric analysis, another methodological novelty, maps the intellectual domain, emphasizing pivotal research themes and the influence of crosslinking time on nanocomposite attributes. While acknowledging its limitations, this study exemplifies the indispensable role of our innovative computational tools in synthesizing and understanding the extensive body of nanocomposite literature. This work not only elucidates prevailing trends but also contributes a unique perspective and novel insights, enhancing our understanding of the nanocomposite research field.

14 April 2024 in Macromolecular Symposia
Verified
Journal Article
Closed access
VVVIVIANE SILVA VALLADAO
VIVIANE SILVA VALLADAO
ESEmerson Oliveira da Silva
Emerson Oliveira da Silva
FSFernando Gomes Souza
Fernando Gomes Souza

15 March 2025 in Journal of Molecular Structure
Verified
Journal Article
Closed access
FSFernando Gomes S.
Fernando Gomes S.
SBShekhar Bhansali
Shekhar Bhansali
VVVIVIANE SILVA VALLADAO
VIVIANE SILVA VALLADAO
FMFabíola Maranhão
Fabíola Maranhão
DBDaniele Brandão
Daniele Brandão
NANidhi Asthana
Nidhi Asthana

3 January 2024 in Preprints.org
Verified
Preprint
Open access
PDF file
Fernando Gomes Souza JrFernando Gomes Souza Jr
Fernando Gomes Souza Jr
SBShekhar Bhansali
Shekhar Bhansali
Kaushik PalKaushik Pal
Kaushik Pal
FMFabíola da Silveira Maranhão
Fabíola da Silveira Maranhão
Marcella Santos MoreiraMarcella Santos Moreira
Marcella Santos Moreira
GBGabriel Silva Bezerra
Gabriel Silva Bezerra
This research presents a comprehensive bibliometric and sentiment analysis of nanocomposite literature from 1990 to 2024. Employing cutting-edge computational methods, the study delves deep into the progression of microstructural characterization, electrical properties, and mechanical behaviors of nanocomposites. The analysis utilizes advanced Boolean search strategies from the Scopus database, ensuring a thorough extraction of thematic content. The results explore various themes and insights, shedding light on trends evident in the Scopus database, particularly the prominence of research on nanocomposite microstructure, electrical attributes, and mechanical performance. The paper also offers textual analytics and bibliometric data, showcasing critical collaborative efforts and influential studies. Significant discoveries encompass the evolution of research language, shifts in thematic focus, and global contributions, providing a comprehensive perspective on the current landscape of nanocomposite research and its dynamic evolution. Moving forward, the "State-of-the-Art and Gaps Extracted from Results and Discussions" section of the paper delves into the most recent advancements in nanocomposite research. It delves into various types of nanocomposites, with a particular emphasis on their microstructural characteristics, electrical properties, mechanical dynamics, and the application of nanocomposite films. This section identifies key research themes, traces historical progress, and highlights emerging trends while underscoring the significance of collaboration and the influence of pivotal studies that have shaped the field. Lastly, in the "Literature Review Guided by Artificial Intelligence" section, the paper introduces a revised approach for researching nanocomposites through AI-guided techniques. This approach prioritizes articles published in 2023 based on citation frequency. Here, the focus is on exploring the relationship between nanocomposites and their electrical properties, emphasizing their fundamental interactions and impact on electrical characteristics. Various nanocomposite systems are covered, highlighting their composition, structure, and functionality. Findings from recent studies are integrated to provide a comprehensive overview of the current state of knowledge in this area. Notably, the sentiment analysis, anchored by an average sentiment score of 0.638771, underscores a positive trajectory in academic discourse, emphasizing the growing recognition of the potential of nanocomposites. The bibliometric exploration maps the intellectual domain, emphasizing pivotal research themes and the influence of crosslinking time on nanocomposite attributes. While this study is thorough, it acknowledges its limitations and advocates for broader database inclusion in future research endeavors. This work elucidates the prevailing trends in nanocomposite research, emphasizing the indispensable role of computational tools in comprehending this vast wealth of information.

1 January 2025 in Anais da Academia Brasileira de Ciências
Verified
Journal Article
Open access
PDF file
Fernando Gomes Souza JrFernando Gomes Souza Jr
Fernando Gomes Souza Jr
SBShekhar Bhansali
Shekhar Bhansali
FMFabíola da Silveira Maranhão
Fabíola da Silveira Maranhão
VVVIVIANE SILVA VALLADAO
VIVIANE SILVA VALLADAO
KVKarine Velasco
Karine Velasco
This study introduces a hybrid method to identify and analyze techniques for microplastic analysis. We improve the detection and understanding of both established and new techniques by integrating regex-based pattern detection with the Llama 3.2:3b language model. Techniques like Raman and FTIR spectroscopy are explored alongside advanced tools, such as X-ray Photoelectron Spectroscopy (XPS) and Surface-Enhanced Raman Spectroscopy (SERS). This combination enhances the accuracy and speed of identifying complex terminology related to microplastics research. Data analysis and visualization were conducted using VOSDataAnalyzer and VOSviewer, allowing us to map connections and trends within a network of related terms. This analysis identified the 15 most commonly used and emerging techniques, showing a shift toward more sensitive and innovative methods in microplastic studies. This novel Regex-Llama approach, introduced here for the first time, provides a scalable methodology applicable to various searches, including the analysis of pollutants in environmental science, the evaluation of material degradation in materials engineering, and the assessment of the toxicological effects of micro-contaminants on public health. This strategy facilitates environmental evaluations and aids in formulating pollution reduction measures, addressing many difficulties across several interesting fields.

1 January 2025 in Polímeros
Verified
Journal Article
Open access
VVVIVIANE SILVA VALLADAO
VIVIANE SILVA VALLADAO
Fernando Gomes Souza JrFernando Gomes Souza Jr
Fernando Gomes Souza Jr
SFSérgio Thode Filho
Sérgio Thode Filho
FMFabíola da Silveira Maranhão
Fabíola da Silveira Maranhão
LRLetícia de Souza Ribeiro
Letícia de Souza Ribeiro
RSRaynara Kelly da Silva dos Santos
Raynara Kelly da Silva dos Santos
Microplastic pollution poses a significant environmental and health challenge due to its persistence and pervasive distribution across ecosystems. This study investigates public perceptions of microplastics, focusing on their environmental and health impacts, through semi-structured interviews with 96 participants from diverse educational backgrounds in Rio de Janeiro, Brazil. Sentiment analysis, hierarchical clustering, and machine learning techniques were employed to analyze the data. Participants ' educational levels and interview locations influenced substantial variability in awareness and attitudes towards microplastics. Academic groups, particularly those specialized in environmental sciences, expressed higher concerns than less specialized or non-academic groups. Sentiment analysis indicated a predominance of neutral to mildly positive sentiments, with 36 distinct clusters identified. The study highlights the need for targeted educational interventions to bridge knowledge gaps and promote pro-environmental behaviors. The results underscore the role of academic background in shaping public perceptions, suggesting tailored communication strategies to mitigate microplastic pollution.