News

Dr. Junseok Lee Completes His PhD Defense and Starts Postdoc at USC

January 10, 2024
Dr. Junseok Lee successfully finished his PhD defense and will start a new position as postdoc at USC from 2024.

Joining Yale Superfund Research Center (YSRC) - P42, NIEHS

September 1, 2022
Professor Fortner joins Yale Superfund Research Center (YSRC)

Joining University of Louisville Superfund Research Center - P42, NIEHS

April 1, 2022
Professor Fortner joins University of Louisville Superfund Research Center (YSRC) as the leader of project 4.

Dr. Ji-Soo Jang Accepts a Tenure Track Position

July 27, 2021
Dr. Ji-Soo Jang has accepted a tenure track, senior research scientist position.
Chart showing Amine-based (PEI) Cr (VI) Photoreduction Rates

New Publication: Photoactive Polyethylenimine-Coated Graphene Oxide Composites for Enhanced Cr (VI) Reduction and Recovery

June 8, 2021
Changwoo Kim, Siyuan An, Junseok Lee, Anushree Ghosh, Mingjiang Zhong, and John D. Fortner demonstrate the significant photoactive potential of PEI for Cr sorption and reduction [to Cr (III)], delineating amine structure–function relationships.

New Publication: Selective and Sensitive Environmental Gas Sensors Enabled by Membrane Overlayers

May 10, 2021
Ji-Soo Jang, Lea R Winter, Changwoo Kim, John D. Fortner, and Menachem Elimelech discuss the underlying gas separation mechanisms for different types of membrane overlayers, including graphene oxide, metal-organic frameworks, and metal oxides, as well as their integration with sensing materials.
Graphic showing effect of temperature time oxidant sonification

New Publication: "A Graphene Oxide Cookbook: Exploring Chemical and Colloidal Properties as a Function of Synthesis Parameters"

November 26, 2020
Siyuan An, Qingqing Zeng, Wenlu Li, and Fortner describe the synthesis of graphene oxide (GO) over a large range of conditions, exploring the effects of reaction temperature, reaction time, oxidant ratio, and sonication time on the chemical and colloidal properties of the product.
Graphic showing element sorption

New Publication: "Surface Functionalized Nanoscale Metal Oxides for Arsenic (V), Chromium (VI), and Uranium (VI) Sorption: Considering Single- and Multi-Sorbate Dynamics"

October 23, 2020
In this publication, Changwoo Kim, Seung Soo Lee, Kit Tan Kwan, Junseok Lee, Wenlu Li, Brandon J. Lafferty, Daniel E. Giammar, and John Fortner evaluate surface-functionalized Mn–Fe oxide nanocrystals (NCs) for single- and multi-sorbate scenarios considering As(V), Cr(VI), and U(VI) in varied water chemistries (deionized (DI), ground, and sea water) at pH 7.0.
Graphic showing colloidal stability

New Publication: "Surface Engineered Nanomaterials in Water: Understanding Critical Dynamics of Soft Organic Coatings and Relative Aggregation Density"

October 15, 2020
Changwoo Kim and Professor John Fortner quantify the role of organic coating dynamics, including structure, grafting density, and configuration on the colloidal stability of organic-coated NPs.
Graphic showing the particle and velocity relationship

New Publication: "Delineating the Relationship between Nanoparticle Attachment Efficiency and Fluid Flow Velocity"

October 14, 2020
In this publication, Changwoo Kim, Kurt D. Pennell, and Professor John Fortner describe a novel method to delineate and quantify physical processes underpinning particle behavior but also provides direct measurements regarding key factors defining the relationship(s) of flow velocity and particle attachment.