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Matthew R. Hartings  - - - 
Top co-authors
Harry B. Gray

440 shared publications

Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States

Mark A. Ratner

221 shared publications

Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA

28
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122
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Publication Record
Distribution of Articles published per year 
(2000 - 2018)
Total number of journals
published in
 
19
 
Publications See all
Article 0 Reads 1 Citation Humidity responsive photonic sensor based on a carboxymethyl cellulose mechanical actuator Matthew Hartings, Kevin O. Douglass, Claire Neice, Zeeshan A... Published: 01 July 2018
Sensors and Actuators B: Chemical, doi: 10.1016/j.snb.2018.03.065
DOI See at publisher website
Article 0 Reads 1 Citation Perception of the importance of chemistry research papers and comparison to citation rates Rachel Borchardt, Cullen Moran, Stuart Cantrill, Chemjobber,... Published: 28 March 2018
PLOS ONE, doi: 10.1371/journal.pone.0194903
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Chemistry researchers are frequently evaluated on the perceived significance of their work with the citation count as the most commonly-used metric for gauging this property. Recent studies have called for a broader evaluation of significance that includes more nuanced bibliometrics as well as altmetrics to more completely evaluate scientific research. To better understand the relationship between metrics and peer judgements of significance in chemistry, we have conducted a survey of chemists to investigate their perceptions of previously published research. Focusing on a specific issue of the Journal of the American Chemical Society published in 2003, respondents were asked to select which articles they thought best matched importance and significance given several contexts: highest number of citations, most significant (subjectively defined), most likely to share among chemists, and most likely to share with a broader audience. The answers to the survey can be summed up in several observations. The ability of respondents to predict the citation counts of established research is markedly lower than the ability of those counts to be predicted by the h-index of the corresponding author of each article. This observation is conserved even when only considering responses from chemists whose expertise falls within the subdiscipline that best describes the work performed in an article. Respondents view both cited papers and significant papers differently than papers that should be shared with chemists. We conclude from our results that peer judgements of importance and significance differ from metrics-based measurements, and that chemists should work with bibliometricians to develop metrics that better capture the nuance of opinions on the importance of a given piece of research.
Article 0 Reads 2 Citations 3D-Printed Acrylonitrile Butadiene Styrene-Metal Organic Framework Composite Materials and Their Gas Storage Properties Michael Bible, Makfir Sefa, James A. Fedchak, Julia Schersch... Published: 01 March 2018
3D Printing and Additive Manufacturing, doi: 10.1089/3dp.2017.0067
DOI See at publisher website
Article 0 Reads 5 Citations Toward 3D Printed Hydrogen Storage Materials Made with ABS-MOF Composites Megan N. Channell, Makfir Sefa, James A. Fedchak, Julia Sche... Published: 19 October 2017
Polymers for Advanced Technologies, doi: 10.1002/pat.4197
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
The push to advance efficient, renewable, and clean energy sources has brought with it an effort to generate materials that are capable of storing hydrogen. Metal-organic framework materials (MOFs) have been the focus of many such studies as they are categorized for their large internal surface areas. We have addressed one of the major shortcomings of MOFs (their processibility) by creating and 3D printing a composite of acrylonitrile butadiene styrene (ABS) and MOF-5, a prototypical MOF, which is often used to benchmark H2 uptake capacity of other MOFs. The ABS-MOF-5 composites can be printed at MOF-5 compositions of 10% and below. Other physical and mechanical properties of the polymer (glass transition temperature, stress and strain at the breaking point, and Young’s modulus) either remain unchanged or show some degree of hardening due to the interaction between the polymer and the MOF. We do observe some MOF-5 degradation through the blending process, likely due to the ambient humidity through the purification and solvent casting steps. Even with this degradation, the MOF still retains some of its ability to uptake H2, seen in the ability of the composite to uptake more H2 than the pure polymer. The experiments and results described here represent a significant first step toward 3D printing MOF-5-based materials for H2 storage.
Article 0 Reads 0 Citations Hop to It Jillian L. Dempsey, Matthew R. Hartings Published: 13 October 2017
Biochemistry, doi: 10.1021/acs.biochem.7b00950
DOI See at publisher website PubMed View at PubMed
PREPRINT-CONTENT 0 Reads 0 Citations On the mechanism of protein-templated gold nanoparticle synthesis: Protein organization, controlled gold sequestration, ... Cassidy Hart, Nouf Abuladel, Madeleine Y. Bee, Megan N. Chan... Published: 26 April 2017
engrXiv, doi: 10.31224/osf.io/k736s
DOI See at publisher website ABS Show/hide abstract
Emerging applications that exploit the properties of nanoparticles for biotechnology require that the nanoparticles be biocompatible or support biological recognition. These types of particles can be produced through syntheses that involve biologically relevant molecules (proteins or natural extracts, for example). Many of the protocols that rely on these molecules are performed without a clear understanding of the mechanism by which the materials are produced. We describe a single-pot reaction in which protein-templated gold nanoparticles (AuNPs) are produced as either solution-suspended colloids or as colloids formed within a solid, fibrous protein structure. We have investigated the mechanism for this process by detailing the reaction kinetics and outcomes through the use of 7 different proteins over a range of concentrations and temperatures. The key factor that controls the synthetic outcome (colloid or fiber) is the concentration of the protein relative to the gold concentration. We find that the observed fibrous structures are more likely to form at low protein concentrations and when hydrophilic proteins are used. An analysis of the reaction kinetics shows that AuNP formation occurs faster at lower protein (fiber-forming) concentrations than at higher protein (colloid-forming) concentrations. These results contradict expectations for reaction kinetics and protein-fiber formation, highlighting the need for a better understanding of the mechanism by which biomolecules can facilitate nanoparticle synthesis. As the protein properties that influence this mechanism are better recognized, researchers will be able to better utilize proteins to generate geometry-controlled AuNPs.
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