Jaime Plazas-Tuttle
@uniandes.edu.co
Assistant Professor, Department of Civil and Environmental Engineering, Faculty of Engineering
Universidad de los Andes
RESEARCH, TEACHING, or OTHER INTERESTS
Environmental Engineering, Civil and Structural Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
L. Angel, A. Villot, M. Rodriguez Susa, J. Plazas-Tuttle, Y. Andres, and C. Gerente
Elsevier BV
Bright C. Elijah, Ali Ahmad, Yalin Li, Jaime Plazas-Tuttle, and Lewis S. Rowles
American Chemical Society (ACS)
Tara Sabo‐Attwood, Christine Ngan, Candice Lavelle, Jaime Plazas‐Tuttle, and Navid B. Saleh
Wiley
Jaime Plazas-Tuttle, Felipe Muñoz Giraldo, and Alba Avila
Elsevier
Jaime Plazas-Tuttle, Dipesh Das, Indu V. Sabaraya, and Navid B. Saleh
Royal Society of Chemistry (RSC)
First report of a nano-enabled breakthrough that harnesses microwave energy for microbial inactivation.
Navid B. Saleh, Dipesh Das, Jaime Plazas-Tuttle, Darwin Yang, Jackson Travis Del Bonis-O'Donnell, and Markita P. Landry
Elsevier BV
Joseph H. Bisesi, Sarah E. Robinson, Candice M. Lavelle, Thuy Ngo, Blake Castillo, Hayleigh Crosby, Keira Liu, Dipesh Das, Jamie Plazas-Tuttle, Navid B. Saleh,et al.
American Chemical Society (ACS)
Recent evidence suggests that, because of their sorptive nature, if single-walled carbon nanotubes (SWCNTs) make their way into aquatic environments, they may reduce the toxicity of other waterborne contaminants. However, few studies have examined whether contaminants remain adsorbed following ingestion by aquatic organisms. The objective of this study was to examine the bioavailability and bioactivity of ethinyl estradiol (EE2) sorbed onto SWCNTs in a fish gastrointestinal (GI) tract. Sorption experiments indicated that SWCNTs effectively adsorbed EE2, but the chemical was still able to bind and activate soluble estrogen receptors (ERs) in vitro. However, centrifugation to remove SWCNTs and adsorbed EE2 significantly reduced ER activity compared to that of EE2 alone. Additionally, the presence of SWCNTs did not reduce the extent of EE2-driven induction of vitellogenin 1 in vivo compared to the levels in organisms exposed to EE2 alone. These results suggest that while SWCNTs adsorb EE2 from aqueous solutions, under biological conditions EE2 can desorb and retain bioactivity. Additional results indicate that interactions with gastrointestinal proteins may decrease the level of adsorption of estrogen to SWCNTs by 5%. This study presents valuable data for elucidating how SWCNTs interact with chemicals that are already present in our aquatic environments, which is essential for determining their potential health risk.
Dipesh Das, Jaime Plazas-Tuttle, Indu Venu Sabaraya, Sneha S. Jain, Tara Sabo-Attwood, and Navid B. Saleh
Royal Society of Chemistry (RSC)
A facile synthesis technique to generate 100s of mg of nanohybrids with carbon nanotubes and metal oxide of choice.
Navid B. Saleh, A. R. M. Nabiul Afrooz, Nirupam Aich, and Jaime Plazas‐Tuttle
Wiley
Nirupam Aich, Jaime Plazas‐Tuttle, and Navid B. Saleh
Wiley
The search for alternative and renewable energy sources has become one of the major thrusts of the twenty‐first‐century researchers due to the increasing demand for energy. Innovations and development of photovoltaics, dye‐sensitized or polymer solar cells, high‐efficiency lithium ion batteries, supercapacitors, trans parent conductors, hydrogen productions and storage systems, microbial fuel cells, catalyst‐driven proton exchange membrane fuel cells, thermoelectric power gener ation, etc., have come to the forefront in alternative energy research [80, 149]. In quest of effective energy transfer, distribution, and storage, improved materials are being synthesized since the 1990s. Nanoscale manipulation of materials has fueled such development [11]. Improved surface area at the nanoscale and targeted molec ular placement or alteration in nanomaterials resulted in desired band gap tuning and effective electron transfer, storage, and surface activity [111]. One of the key challenges that eluded energy researchers for decades was an efficient photoelec tron acceptor with high structural stability and chemical reactivity; a spheroidal
Jaime Plazas-Tuttle, Lewis Rowles, Hao Chen, Joseph Bisesi, Tara Sabo-Attwood, and Navid Saleh
MDPI AG
Nanomaterial science and design have shifted from generating single passive nanoparticles to more complex and adaptive multi-component nanohybrids. These adaptive nanohybrids (ANHs) are designed to simultaneously perform multiple functions, while actively responding to the surrounding environment. ANHs are engineered for use as drug delivery carriers, in tissue-engineered templates and scaffolds, adaptive clothing, smart surface coatings, electrical switches and in platforms for diversified functional applications. Such ANHs are composed of carbonaceous, metallic or polymeric materials with stimuli-responsive soft-layer coatings that enable them to perform such switchable functions. Since ANHs are engineered to dynamically transform under different exposure environments, evaluating their environmental behavior will likely require new approaches. Literature on polymer science has established a knowledge core on stimuli-responsive materials. However, translation of such knowledge to environmental health and safety (EHS) of these ANHs has not yet been realized. It is critical to investigate and categorize the potential hazards of ANHs, because exposure in an unintended or shifting environment could present uncertainty in EHS. This article presents a perspective on EHS evaluation of ANHs, proposes a principle to facilitate their identification for environmental evaluation, outlines a stimuli-based classification for ANHs and discusses emerging properties and dynamic aspects for systematic EHS evaluation.
Nirupam Aich, Eunho Kim, Mohamed ElBatanouny, Jaime Plazas-Tuttle, Jinkyu Yang, Paul Ziehl, and Navid B Saleh
SAGE Publications
This article demonstrates the ability of surface-coated triboluminescent materials to detect damage in carbon fiber–reinforced polymer specimens. An experimental protocol was developed to test the efficiency of the triboluminescent-based diagnostic method using carbon fiber–reinforced polymer coupons under combined bending–compression conditions. Luminescence, emitted from the triboluminescent coatings under quasi-static loading, was detected by capturing digital images. We employed image processing software to quantify change in luminescence as a function of triboluminescent concentration. We observed that 10%, 20%, and 30% triboluminescent coating resulted in 25.3, 27.9, and 40.4 (arbitrary units) total luminescence, respectively, which shows a positive correlation of triboluminescent concentration with luminescence. Finite element simulation was also performed to understand the stress and strain distribution and to aid in understanding and correlating light emission regions on the carbon fiber–reinforced polymer coupons under bending deformation. This work represents a step toward the development of a robust technology that employs triboluminescent materials for early damage detection, consistent with theoretical predictions of damage occurrence.
Navid B. Saleh, Nirupam Aich, Jaime Plazas-Tuttle, Jamie R. Lead, and Gregory V. Lowry
Royal Society of Chemistry (RSC)
This perspective proposes principles to identify nanohybrids with novel properties relevant to nano EHS research, and discusses specific challenges for EHS research on these materials.
Navid B. Saleh, Bryant Chambers, Nirupam Aich, Jaime Plazas-Tuttle, Hanh N. Phung-Ngoc, and Mary Jo Kirisits
Frontiers Media SA
Metal and metal-oxide nanoparticles (NPs) are used in numerous applications and have high likelihood of entering engineered and natural environmental systems. Careful assessment of the interaction of these NPs with bacteria, particularly biofilm bacteria, is necessary. This perspective discusses mechanisms of NP interaction with bacteria and identifies challenges in understanding NP–biofilm interaction, considering fundamental material attributes and inherent complexities of biofilm structure. The current literature is reviewed, both for planktonic bacteria and biofilms; future challenges and complexities are identified, both in light of the literature and a dataset on the toxicity of silver NPs toward planktonic and biofilm bacteria. This perspective aims to highlight the complexities in such studies and emphasizes the need for systematic evaluation of NP–biofilm interaction.
Navid Saleh, A. Afrooz, Joseph Bisesi,, Nirupam Aich, Jaime Plazas-Tuttle, and Tara Sabo-Attwood
MDPI AG
Conjugation of multiple nanomaterials has become the focus of recent materials development. This new material class is commonly known as nanohybrids or “horizon nanomaterials”. Conjugation of metal/metal oxides with carbonaceous nanomaterials and overcoating or doping of one metal with another have been pursued to enhance material performance and/or incorporate multifunctionality into nano-enabled devices and processes. Nanohybrids are already at use in commercialized energy, electronics and medical products, which warrant immediate attention for their safety evaluation. These conjugated ensembles likely present a new set of physicochemical properties that are unique to their individual component attributes, hence increasing uncertainty in their risk evaluation. Established toxicological testing strategies and enumerated underlying mechanisms will thus need to be re-evaluated for the assessment of these horizon materials. This review will present a critical discussion on the altered physicochemical properties of nanohybrids and analyze the validity of existing nanotoxicology data against these unique properties. The article will also propose strategies to evaluate the conjugate materials’ safety to help undertake future toxicological research on the nanohybrid material class.
Nirupam Aich, Jaime Plazas-Tuttle, Jamie R. Lead, and Navid B. Saleh
CSIRO Publishing
Environmental context Recent developments in nanotechnology have focussed towards innovation and usage of multifunctional and superior hybrid nanomaterials. Possible exposure of these novel nanohybrids can lead to unpredicted environmental fate, transport, transformation and toxicity scenarios. Environmentally relevant emerging properties and potential environmental implications of these newer materials need to be systematically studied to prevent harmful effects towards the aquatic environment and ecology. Abstract Nanomaterial synthesis and modification for applications have progressed to a great extent in the last decades. Manipulation of the physicochemical properties of a material at the nanoscale has been extensively performed to produce materials for novel applications. Controlling the size, shape, surface functionality, etc. has been key to successful implementation of nanomaterials in multidimensional usage for electronics, optics, biomedicine, drug delivery and green fuel technology. Recently, a focus has been on the conjugation of two or more nanomaterials to achieve increased multifunctionality as well as creating opportunities for next generation materials with enhanced performance. With incremental production and potential usage of such nanohybrids come the concerns about their ecological and environmental effects, which will be dictated by their not-yet-understood physicochemical properties. While environmental implication studies concerning the single materials are yet to give an integrated mechanistic understanding and predictability of their environmental fate and transport, the importance of studying the novel nanohybrids with their multi-dimensional and complex behaviour in environmental and biological exposure systems are immense. This article critically reviews the literature of nanohybrids and identifies potential environmental uncertainties of these emerging ‘horizon materials’.
María Catalina Ramírez, Jaime Plazas, Camilo Torres, Juan Camilo Silva, Luis Camilo Caicedo, and Miguel Angel González
Springer Science and Business Media LLC
Amos Bick, Jaime G. Plazas T, Fei Yang, Adi Raveh, Josef Hagin, and Gideon Oron
Elsevier BV