DataExpo GAKG DeepReport Navigation

Copyright©2015-2024 Acemap, Inc. Shanghai Jiao Tong University. All rights reserved.

沪ICP备18028330号

BG

Benjamin Gilbert

Lawrence Berkeley National Laboratory

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Jillian F. Banfield

University of California, Berkeley

Sergio Carrero

Institute of Environmental Assessment and Water Research

Piotr Zarzycki

Lawrence Berkeley National Laboratory

Kenneth H. Williams

Rocky Mountain Biological Laboratory

Peter Nico

Lawrence Berkeley National Laboratory

Michael Whittaker

Lawrence Berkeley National Laboratory

Hui Zhang

University of Chinese Academy of Sciences

Luis R. Comolli

Lawrence Berkeley National Laboratory

Bhavna Arora

Lawrence Berkeley National Laboratory

Tetsu K. Tokunaga

Lawrence Berkeley National Laboratory

Cooperative Institutions

Lawrence Berkeley National Laboratory

University of California, Berkeley

Berkeley College

Planetary Science Institute

Pacific Northwest National Laboratory

Centre National de la Recherche Scientifique

Stanford University

Université Grenoble Alpes

NASA Earth Science

Lawrence Livermore National Laboratory

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

An atomic perspective on the serpentine-chlorite solid-state transformation

arXiv (Cornell University) (2021)

Hui Zhang Benjamin Gilbert Jillian F. Banfield

Serpentine minerals are important components of metamorphic rocks and promising geo-materials for nanotechnology. Lizardite, the most abundant serpentine mineral, can be transformed into chlorite during metamorphism. This intriguing phase transformation should affect the deformation behavior during aseismic creep and slow slip at the base of the subduction zone, but has not been understood structurally and chemically at the atomic scale. Here we visualized cations and oxygen atoms using the state-of-the-art low-dose scanning transmission electron microscopy and found that restructuring mainly involves the synergistic migration of tetrahedral cations and oxygen anions, coupled with the migration of octahedral trivalent cations into the brucite-like interlayer. Further, we show that different serpentine polytypes result in distinct regular interstratifications of serpentine and chlorite. Our results clarify the long-standing puzzle of how solid-state layer silicate transformations occur and lead to long-period ordered structures.

Brucite

10.48550/arxiv.2103.05210

Cite

Citations (0)

Submicron-scale isotopic variations within biogenic ZnS record the mechanism and kinetics of extracellular metal-sulfide biomineralization

Geochimica et Cosmochimica Acta (2006)

John W. Moreau Peter Weber Michael C. Martin Richard I. Webb Benjamin Gilbert

10.1016/j.gca.2006.06.861

Cite

Citations (1)

Polytypism in semi-disordered lizardite and amesite by low-dose HAADF- STEM

Hui Zhang Piotr Zarzycki Benjamin Gilbert Jillian F. Banfield

Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at American Mineralogist. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Polytypism in semi-disordered lizardite and amesite by low-dose HAADF- STEMAuthorsHuiZhangiDPiotrZarzyckiBenjaminGilbertJillian FBanfieldSee all authors Hui ZhangiD• Submitting AuthorLawrence Berkeley National LaboratoryiDhttps://orcid.org/0000-0003-2269-320Xview email addressThe email was not providedcopy email addressPiotr ZarzyckiLawrence Berkeley National Laboratoryview email addressThe email was not providedcopy email addressBenjamin GilbertLawrence Berkeley National Laboratoryview email addressThe email was not providedcopy email addressJillian F BanfieldCorresponding AuthorLawrence Berkeley National LaboratoryUniversity of Californiaview email addressThe email was not providedcopy email address

Preprint

10.1002/essoar.10504580.1

Cite

Citations (2)

Transport and humification of dissolved organic matter within a semi-arid floodplain

Journal of Environmental Sciences (2016)

Wenming Dong Jiamin Wan Tetsu K. Tokunaga Benjamin Gilbert Kenneth H. Williams

Humus

10.1016/j.jes.2016.12.011

Cite

Citations (27)

Crumpling of silver nanowires by endolysosomes strongly reduces toxicity

Proceedings of the National Academy of Sciences (2019)

Sylvia Lehmann Djadidi Toybou A. Real Devrah Arndt Abderrahmane Tagmount

Fibrous particles interact with cells and organisms in complex ways that can lead to cellular dysfunction, cell death, inflammation, and disease. The development of conductive transparent networks (CTNs) composed of metallic silver nanowires (AgNWs) for flexible touchscreen displays raises new possibilities for the intimate contact between novel fibers and human skin. Here, we report that a material property, nanowire-bending stiffness that is a function of diameter, controls the cytotoxicity of AgNWs to nonimmune cells from humans, mice, and fish without deterioration of critical CTN performance parameters: electrical conductivity and optical transparency. Both 30- and 90-nm-diameter AgNWs are readily internalized by cells, but thinner NWs are mechanically crumpled by the forces imposed during or after endocytosis, while thicker nanowires puncture the enclosing membrane and release silver ions and lysosomal contents to the cytoplasm, thereby initiating oxidative stress. This finding extends the fiber pathology paradigm and will enable the manufacture of safer products incorporating AgNWs.

10.1073/pnas.1820041116

Cite

Citations (34)

Atomic Perspective on the Serpentine–Chlorite Solid-State Transformation

Chemistry of Materials (2021)

Hui Zhang Benjamin Gilbert Jillian F. Banfield

Serpentine minerals are important components of metamorphic rocks and promising geo-materials for nanotechnology. Lizardite, the most abundant serpentine mineral, can be transformed into chlorite during metamorphism. This intriguing phase transformation should affect the deformation behavior during aseismic creep and slow slip at the base of the subduction zone, but has not been understood structurally and chemically at the atomic scale. Here, we visualized cations and oxygen atoms using the state-of-the-art low-dose scanning transmission electron microscopy and found that restructuring mainly involves the synergistic migration of tetrahedral cations and oxygen anions, coupled with the migration of octahedral trivalent cations into the brucite-like interlayer. Further, we show that different serpentine polytypes result in distinct regular interstratifications of serpentine and chlorite. Our results clarify the long-standing puzzle of how solid-state layer silicate transformations occur and lead to long-period ordered structures.

Brucite

10.1021/acs.chemmater.1c00894

Cite

Citations (3)

Electron Small Polarons and Their Mobility in Iron (Oxyhydr)oxide Nanoparticles

Jordan E. Katz Xiaoyi Zhang Klaus Attenkofer Karena W. Chapman Cathrine Frandsen

Electron mobility within iron (oxyhydr)oxides enables charge transfer between widely separated surface sites. There is increasing evidence that this internal conduction influences the rates of interfacial reactions and the outcomes of redox-driven phase transformations of environmental interest. To determine the links between crystal structure and charge-transport efficiency, we used pump-probe spectroscopy to study the dynamics of electrons introduced into iron(III) (oxyhydr)oxide nanoparticles via ultrafast interfacial electron transfer. Using time-resolved x-ray spectroscopy and ab initio calculations, we observed the formation of reduced and structurally distorted metal sites consistent with small polarons. Comparisons between different phases (hematite, maghemite, and ferrihydrite) revealed that short-range structural topology, not long-range order, dominates the electron-hopping rate.

Ferrihydrite

Maghemite

10.1126/science.1223598

Cite

Citations (181)

Mineralogical, magnetic and geochemical data constrain the pathways and extent of weathering of mineralized sedimentary rocks

Geochimica et Cosmochimica Acta (2022)

Sergio Carrero Sarah P. Slotznick Sirine C. Fakra M. Cole Sitar Sharon Bone

Sulfide Minerals

Authigenic

Silicate minerals

10.1016/j.gca.2022.11.005

Cite

Citations (3)

High-precision chemical quantum sensing in flowing monodisperse microdroplets

Science Advances (2024)

Adrisha Sarkar Zachary R. Jones Madhur Parashar Emanuel Druga Amala Akkiraju

A method is presented for high-precision chemical detection that integrates quantum sensing with droplet microfluidics. Using nanodiamonds (ND) with fluorescent nitrogen-vacancy (NV) centers as quantum sensors, rapidly flowing microdroplets containing analyte molecules are analyzed. A noise-suppressed mode of optically detected magnetic resonance is enabled by pairing controllable flow with microwave control of NV electronic spins, to detect analyte-induced signals of a few hundredths of a percent of the ND fluorescence. Using this method, paramagnetic ions in droplets are detected with low limit-of-detection using small analyte volumes, with exceptional measurement stability over >10 3 s. In addition, these droplets are used as microconfinement chambers by co-encapsulating ND quantum sensors with various analytes such as single cells, suggesting wide-ranging applications including single-cell metabolomics and real-time intracellular measurements from bioreactors. Important advances are enabled by this work, including portable chemical testing devices, amplification-free chemical assays, and chemical imaging tools for probing reactions within microenvironments.

Digital Microfluidics

Quantum sensor

10.1126/sciadv.adp4033

Cite

Citations (0)

Pathways for the Photoreduction of Fumarate on ZnS

ACS Earth and Space Chemistry (2019)

D. M. Mangiante Richard D. Schaller Jillian F. Banfield Benjamin Gilbert

Semiconductor mineral particles can act as photocatalysts for organic redox reactions that occur enzymatically in modern biological metabolic pathways. Semiconductor mineral-mediated photocatalysis may have contributed to the prebiotic synthesis of organic acids on the early Earth, but assessing the plausibility of this hypothesis is impeded by the lack of knowledge about the mechanisms for light-driven organic redox reactions on mineral surfaces. We selected one step in the reverse tricarboxylic acid (rTCA) cycle, the reduction of fumarate to succinate, that has been shown to be photocatalyzed by zinc sulfide (ZnS). Using static and time-resolved optical emission and absorption spectroscopy, we studied the adsorption of fumarate and the rates and pathways for charge transfer. We find that ZnS transfers photoexcited electrons to bound and dissolved fumarate on a wide range of time scales but not to succinate, supporting the concept that ZnS mediated photoreduction of fumarate could have operated in oceans of the early Earth. Optical transient absorption (TA) spectroscopy identified a signature tentatively attributed to the fumarate radical anion that is stable for at least 8 ns, providing evidence that fumarate photoreduction under solar illumination levels occurs by successive photoelectron transfer. The model for electronic excitation, relaxation, and interfacial charge-transfer processes in ZnS provided here will inform all future studies of the photochemical reactions of this mineral.

Dimethyl fumarate

Fumarate reductase

10.1021/acsearthspacechem.9b00169

Cite

Citations (2)