Jingshan S. Du

Jingshan S. Du
Pacific Northwest National Laboratory | PNNL · Physical Sciences Division

PhD

About

37
Publications
4,850
Reads
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725
Citations
Additional affiliations
October 2015 - present
Northwestern University
Position
  • Research Assistant
October 2014 - May 2015
Harvard University
Position
  • Visiting Undergraduate
July 2014 - September 2014
University of California, Los Angeles
Position
  • Visiting Undergraduate
Description
  • Fellow, Cross-disciplinary Scholars in Science and Technology
Education
September 2015 - June 2020
Northwestern University
Field of study
  • Materials Science and Engineering
August 2011 - June 2015
Zhejiang University
Field of study
  • Honors College; Materials Science and Engineering

Publications

Publications (37)
Article
Full-text available
Colloidal crystal engineering of complex, low-symmetry architectures is challenging when isotropic building blocks are assembled. Here we describe an approach to generating such structures based upon programmable atom equivalents (nanoparticles functionalized with many DNA strands) and mobile electron equivalents (small particles functionalized wit...
Article
Full-text available
Corrosion is a significant problem for the stability of structural metals and potentially for functional nanomaterials in operating environments. When two metals with different electrochemical potentials form a junction, galvanic corrosion occurs, resulting in the sacrificial dissolution of the metal with a higher oxidation potential (lower electro...
Article
Full-text available
Several transition‐metal oxides and hydroxides based on earth‐abundant elements, such as Fe, Ni, and Co, have emerged as a new generation of oxygen evolution reaction (OER) catalysts due to their low cost, favorable activity, and multifunctional behavior. However, the relatively complicated surface structuring methods, high Tafel slope, and low sta...
Article
Full-text available
The structure of multiply twinned particles (MTPs) provides an example of how specific crystallographic features dictate the geometric shape of finite-sized crystals. The formation of MTPs during colloidal synthesis can occur through at least two different pathways: 1) growth from multiply twinned seeds or 2) the stepwise formation of new twin boun...
Article
Full-text available
Critical concepts for understanding the formation pathways of colloidal multiply twinned nanoparticles are reviewed. As the direct observation of two pathways has recently been achieved, new opportunities exist for acquiring a deeper understanding of twin formation and symmetry breaking. This knowledge will improve the synthetic control of nanopart...
Article
Full-text available
Colloidal crystals have emerged as promising candidates for building optical microdevices. Techniques now exist for synthesizing them with control over their nanoscale features (e.g., particle compositions, sizes, shapes, and lattice parameters and symmetry); however, the ability to tune macroscale structural features, such as the relative position...
Article
Full-text available
Halide perovskites have exceptional optoelectronic properties, but a poor understanding of the relationship between crystal dimensions, composition, and properties limits their use in integrated devices. We report a new multiplexed cantilever-free scanning probe method for synthesizing compositionally diverse and size-controlled halide perovskite n...
Conference Paper
Full-text available
Microscopy-Based Approaches to Characterizing Analogs of Classical Electrons in Colloidal Crystals Engineered with DNA - Jingshan Du, Shunzhi Wang, Vinayak Dravid, Chad Mirkin
Conference Paper
Full-text available
Hierarchically Structured Mixed Oxide Electrodes for Oxygen Evolution Reaction: A Multimodal Electron Microscopy Study - Jingshan Du, Qian Rong, Xinqi Chen, Qingju Liu, Vinayak Dravid
Article
A novel method for synthesizing arrays of uniform sub-2 nm particles on substrates is described. Such particles are made by (i) using dip-pen nanolithography to prepare nanoreactors consisting of metal-coordinated polymers; (ii) designing polymers with only one metal atom attached to each polymer chain; (iii) systematically controlling nanoreactor...
Article
Full-text available
A novel method for synthesizing and photopatterning colloidal crystals via light‐responsive DNA is developed. These crystals are composed of 10–30 nm gold nanoparticles interconnected with azobenzene‐modified DNA strands. The photoisomerization of the azobenzene molecules leads to reversible assembly and disassembly of the base‐centered cubic (bcc)...
Article
Colloidal crystal engineering with DNA has emerged as a powerful tool for precisely controlling the arrangement of nanoscale building blocks in three-dimensional superlattices, where nanoparticles densely modified with DNA can be viewed as "programmable atom equivalents" (PAEs). Although a wide variety of complementary DNA-modified nanoparticles, d...
Article
Full-text available
A versatile method for the design of colloidal crystals involves the use of DNA as a particle-directing ligand. With such systems, DNA-nanoparticle conjugates are considered programmable atom equivalents (PAEs), and design rules have been devised to engineer crystallization outcomes. This work shows that when reduced in size and DNA grafting densit...
Article
Nanomaterials that form as heterostructures have applications in catalysis, plasmonics, and electronics. Multielement nanoparticles can now be synthesized through a variety of routes, but how thermodynamic phases form in such structures and how specific interfaces between them can be designed and synthesized are still poorly understood. We explored...
Article
The nanomaterial landscape is so vast that a high-throughput combinatorial approach is required to understand structure–function relationships. To address this challenge, an approach for the synthesis and screening of megalibraries of unique nanoscale features (>10,000,000) with tailorable location, size, and composition has been developed. Polymer...
Article
Full-text available
The interactions between nanoparticles and solvents play a critical role in the formation of complex, metastable nanostructures. However, direct observation of such interactions with high spatial and temporal resolution is challenging with conventional liquid-cell transmission electron microscopy (TEM) experiments. Here, a windowless system consist...
Preprint
Full-text available
The interactions between nanoparticles and solvents play a critical role in the formation of complex, metastable nanostructures. However, direct observation of such interactions with high spatial and temporal resolution is challenging with conventional liquid-cell transmission electron microscopy (TEM) experiments. Here, a windowless system consist...
Article
Full-text available
Solid-state transformation is often accompanied by mechanical expansion/compression, due to their volume change and structural evolution at interfaces at the atomic scale. However, these two types of dynamics are usually difficult to monitor in the same time. In this work, we use in-situ transmission electron microscopy to directly study the reduct...
Conference Paper
Full-text available
Using STEM to Probe the in-situ Dynamics of Multimetallic Nanoparticles Grown in Polymer Nanoreactors - Volume 23 Issue S1 - Jingshan S. Du, Peng-Cheng Chen, Vinayak P. Dravid, Chad A. Mirkin
Article
Recent developments in scanning probe block copolymer lithography (SPBCL) enable the confinement of multiple metal precursors in a polymer nanoreactor and their subsequent transformation into a single multimetallic heterostructured nanoparticle through thermal annealing. However, the process by which multimetallic nanoparticles form in SPBCL-patter...
Article
A high-throughput, solution-based, scanning-probe photochemical nanopatterning approach, which does not require the use of probes with subwavelength apertures, is reported. Specifically, pyramid arrays made from high-refractive-index polymeric materials were constructed and studied as patterning tools in a conventional liquid-phase beam pen lithogr...
Article
Full-text available
Multicomponent nanoparticles can be synthesized with either homogeneous or phase-segregated architectures depending on the synthesis conditions and elements incorporated. To understand the parameters that determine their structural fate, multicomponent metal-oxide nanoparticles consisting of combinations of Co, Ni, and Cu were synthesized via scann...
Article
Full-text available
Ultrafine Pt nanoparticles loaded on ceria (CeO2) are promising nanostructured catalysts for many important reactions. However, such catalysts often suffer from thermal instability due to coarsening of Pt nanoparticles at elevated temperatures, especially for those with high Pt loading, which leads to severe deterioration of catalytic performances....
Article
Full-text available
Multicomponent nanoparticles can be synthesized with either homogeneous or phase-segregated architectures depending on the synthesis conditions and elements incorporated. To understand the parameters that determine their structural fate, multicomponent metal-oxide nanoparticles consisting of combinations of Co, Ni, and Cu were synthesized by using...
Article
Full-text available
At the forefront of nanochemistry, there exists a research endeavor centered around intermetallic nanocrystals, which are unique in terms of long-range atomic ordering, well-defined stoichiometry, and controlled crystal structure. In contrast to alloy nanocrystals with no elemental ordering, it is challenging to synthesize intermetallic nanocrystal...
Article
Full-text available
Rh is a promising candidate as an indispensible component in bimetallic catalysts due to its unique capability to resist against the aggressive corrosion from the reaction medium. However, Rh has too strong oxygen binding ability and is generally not suitable for oxygen reduction reaction (ORR). Here, we have demonstrated shape-controlled synthesis...
Article
Full-text available
Anisotropic Au nanoparticles show unique localized surface plasmon resonance (LSPR) properties, which make it attractive in optical, sensing, and biomedical applications. In this contribution, we report a general and facile strategy towards aqueous synthesis of Au and M@Au (M = Pd, CuPt) hybrid nanostars by reducing HAuCl4 with ethanolamine in the...
Article
Full-text available
Langmuir isotherm, as a theoretical equation in solid adsorption, has been utilized in solution adsorption experiment in some textbooks. The linear equation provided by these textbooks is not consistent with experiment facts above ca. 0.1 mol/L, which has led to confusion in both theory and data processing. A more reasonable relationship has been p...
Patent
Full-text available
NOVELTY - The device has a voltage measuring device (5) connected with an ultrasonic interference source (2). An ultrasonic receiver (3) is set at two sides of the measured fluid part. A connecting line is formed vertical to an interference source and a receiver. The ultrasonic interference source is placed at an air outlet. An ultrasonic receiver...
Article
Full-text available
High-quality Pt nanobars with a controlled aspect ratio were synthesized by varying the amount of formaldehyde in benzyl alcohol containing oleylamine and exhibited substantially enhanced electrocatalytic properties for methanol oxidation relative to the commercial Pt/C.
Article
Full-text available
Considering the practical factors of astronomical education in high schools in China,we have designed and installed a remote-control telescope system in Aksu City,Xinjiang,where there are more nights than in Hangzhou. The optical system of the telescope is of a 28cm Schmidt-Cassegrain (F = 280cm) design with the Sloan g'r'i'z' filters,a dual-CCD ca...

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