Acute and Chronic Toxicity to Daphnia Magna of Colloidal Silica Nanoparticles in a Chemical Mechanical Planarization Slurry after Polishing a Gallium Arsenide Wafer

dc.contributor.ORCID0000-0001-5535-8358 (Pantano, P)
dc.contributor.authorKarimi, Sarah
dc.contributor.authorTroeung, Meiline
dc.contributor.authorWang, Ruhung
dc.contributor.authorDraper, Rockford K.
dc.contributor.authorPantano, Paul
dc.contributor.authorCrawford, Steven
dc.contributor.authorAravamudhan, Shyam
dc.contributor.utdAuthorKarimi, Sarah
dc.contributor.utdAuthorTroeung, Meiline
dc.contributor.utdAuthorWang, Ruhung
dc.contributor.utdAuthorDraper, Rockford K.
dc.contributor.utdAuthorPantano, Paul
dc.descriptionDue to copyright restrictions and/or publisher's policy full text access from Treasures at UT Dallas is not available. UTD affiliates may be able to acquire a copy through Interlibrary Loan by using the link to UTD ILL.
dc.description.abstractSemiconductor chip manufacturers use slurries of metal oxide nanoparticles (NPs) as abrasives in chemical mechanical planarization (CMP) processes on wafers containing films of III/V semiconducting materials. Assessing the toxicity of these specialized NPs is challenging not only because commercial slurries may contain undefined toxic constituents, but because CMP processes can change the physical and chemical properties of the NPs. Herein, the fresh water flea Daphnia magna (D. magna) was used to assess the effects of Ultra-Sol (R) 200S CMP slurry containing similar to 30-nm colloidal silica (c-SiO₂) NPs before (pristine) and after (spent) a GaAs wafer was polished with an extreme arm-pressure of 5 psi. In the acute 96-hour toxicity assessments, both the pristine and spent slurries at 4.0 mg/mL c-SiO₂ NPs had little effect on D. magna morbidity and body sizes. In the chronic 21-day toxicity assessments, neither slurry at 0.10 mg/mL c-SiO₂ NPs was toxic, but both slurries lead to a modest (9-10%) increase in D. magna body sizes and a significant (similar to 2-fold) increase in reproductive output, indicative of a positive hormetic response. Identical increases in D. magna body sizes and reproductive output were observed with a supernatant of the pristine slurry, in the absence of the c-SiO₂ NPs, indicating that soluble material in the pristine supernatant contributed to the hormetic response, which suggests that the soluble material may also contribute to the hormetic response of the spent material.
dc.description.departmentSchool of Behavioral and Brain Sciences
dc.identifier.bibliographicCitationKarimi, Sarah, Meiline Troeung, Ruhung Wang, Rockford Draper, et al. 2019. "Acute and chronic toxicity to Daphnia magna of colloidal silica nanoparticles in a chemical mechanical planarization slurry after polishing a gallium arsenide wafer." Nanoimpact 13: 56-65, doi: 10.1016/j.impact.2018.12.004
dc.publisherElsevier Science BV
dc.rights©2018 Elsevier B.V. All rights reserved.
dc.subjectDaphnia magna
dc.subjectNanoparticles—Metal oxide
dc.subjectAquatic invertebrates
dc.subjectEnvironmental toxicology
dc.subjectNanostructured materials
dc.titleAcute and Chronic Toxicity to Daphnia Magna of Colloidal Silica Nanoparticles in a Chemical Mechanical Planarization Slurry after Polishing a Gallium Arsenide Wafer


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