Article
Chemistry, Multidisciplinary
Fei Fan Yang, Chun Hong Li, Wen Yi Lv, Shu Jun Zhen, Cheng Zhi Huang
Summary: This study utilized specific fluorescent molecules to construct DNA photonic wires with high-energy transfer efficiency and polychromatic emission properties, which can be utilized for efficient information encryption.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Bo Zhao, Sid Assawaworrarit, Parthiban Santhanam, Meir Orenstein, Shanhui Fan
Summary: Direct current (DC) converters are essential in electronic circuits, with traditional high-efficiency DC voltage converters facing limitations due to electromagnetic noise from switching currents. A photonic transformer has been proposed as a potential solution, offering near-unity conversion efficiency and high voltage conversion ratios.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Woojung Lee, Shayan Louie, Austin M. Evans, Nicholas M. Orchanian, Ilana B. Stone, Boyuan Zhang, Yujing Wei, Xavier Roy, Colin Nuckolls, Latha Venkataraman
Summary: This study demonstrates that dynamic molecular structures lead to temperature-dependent conductance in molecular wires. Thermally activated dihedral rotations increase the probability of molecular wires being in a planar conformation, enhancing tunneling probability. Longer molecular wires with more rotational pivot points exhibit larger temperature dependence on conductance.
Article
Chemistry, Multidisciplinary
Aishwaryo Ghosh, Biswajit Pabi, Atindra Nath Pal, Tanusri Saha-Dasgupta
Summary: This study presents a machine learning approach using experimentally measured conductance traces to investigate the formation of atomic chains. By analyzing two data sets, the optimum conditions for forming longer chains are determined, and a deep learning method is used to classify breaking traces and identify features related to long-chain formation. Further insights are gained through ab initio molecular dynamics simulations.
Article
Engineering, Chemical
Yang Meng, Shaopeng Wang, Yicheng Zhang, Shuangtao Chen, Yu Hou, Liang Chen
Summary: This study conducted experiments on gas separation systems under offshore conditions, proposed reduction factors to evaluate the influence of offshore conditions on system performance, and presented two correlations to predict efficiency reduction factors under different conditions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Gaurav Vishwakarma, Bijesh K. Malla, K. S. S. V. Prasad Reddy, Jyotirmoy Ghosh, Soham Chowdhury, Sharma S. R. K. C. Yamijala, Sandeep K. Reddy, Rajnish Kumar, Thalappil Pradeep
Summary: Restricted migration of CO2 from clathrate hydrate cages to amorphous solid water matrix was observed in the presence of tetrahydrofuran (THF) under ultrahigh vacuum and cryogenic conditions. This cage-matrix exchange may create a more conducive environment for chemical transformations in interstellar environments.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Gaurav Vishwakarma, Bijesh K. Malla, K. S. S. V. Prasad Reddy, Jyotirmoy Ghosh, Soham Chowdhury, Sharma S. R. K. C. Yamijala, Sandeep K. Reddy, Rajnish Kumar, Thalappil Pradeep
Summary: Restricted migration limits chemical transformations within interstellar and cometary ices. We found that CO2 can migrate from clathrate hydrate cages to amorphous solid water in the presence of tetrahydrofuran under ultrahigh vacuum and cryogenic conditions. This migration may create a more conducive environment for chemical transformations in interstellar environments.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Analytical
Mihaela Puiu, Lucian-Gabriel Zamfir, George Madalin Danila, Francesco Papi, Cristina Nativi, Valentin Mirceski, Camelia Bala
Summary: A peptide molecular wire was used as a conductive support for ligand immobilization in biosensing assays, with the kinetic parameters of the electrode reaction estimated. The peptide wire mediated a two-step electron transfer from Methylene Blue (MB) to the gold surface, with potential for developing an electrochemical peptide-based biosensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Paul D. Cunningham, Christopher M. Spillmann, Joseph S. Melinger, Mario G. Ancona, Young C. Kim, Divita Mathur, Susan Buckhout-White, Ellen R. Goldman, Igor L. Medintz
Summary: Experimental results based on a model system show that the dual rail design is more efficient than the split rail design, and optimized dual rails can achieve 50% end-to-end efficiency. By balancing the increase in FRET rate from multiple interacting pathways with undesirable fluorescence quenching between dyes in close proximity, functional photonic wires can be designed.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Thermodynamics
Philipp Golda, Noah Lettner, Robert Schiessl, Ulrich Maas
Summary: This work presents an experimental setup to study cryogenic impingement cooling performance under given inflow conditions, examining the relationship between heat flux and heat transfer coefficients. Important conclusions regarding heat flux and its governing physical phenomena are drawn.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Wenbin Zhou, Dongmei Han, Guodong Xia
Summary: The dramatic development in electronics has raised the challenge of cooling. Nucleate pool boiling, a highly efficient phase-change heat transfer technology, holds great promise for dissipating high-heat-flux sustainably. However, the effects of solid-liquid interactions on nucleate boiling over superhydrophilic surfaces are not well understood. In this study, molecular dynamics simulations are used to quantitatively illustrate these effects and provide guidance for surface design in thermal management systems.
APPLIED SURFACE SCIENCE
(2022)
Article
Thermodynamics
Mirhadi S. Sadaghiani, Arman Siahvashi, Bruce W. E. Norris, Saif Z. S. Al Ghafri, Arash Arami-Niya, Eric F. May
Summary: High boiling-point components can improve the performance of natural gas and hydrogen liquefaction facilities, but can also cause freezing and blockage risks. This study measures freezing and melting temperatures and adjusts thermodynamic model parameters to improve predictions and confirm solubility of iso-pentane in mixed refrigerants. Addition of iso-pentane increases the available duty for cooling natural gas or hydrogen.
Article
Chemistry, Physical
Yaobin Jiang, Yusong Yu, Zheng Wang, Shurui Zhang, Jie Cao
Summary: In this study, the heat transfer and phase change processes of cryogenic liquid hydrogen in a storage tank were simulated using the RANS method coupled with the Lee model and VOF method. Numerical results showed that increasing gravitational acceleration enhanced convective heat transfer and evaporation processes in the tank. The increase in initial liquid hydrogen temperature decreased the heat required to raise the liquid to saturation temperature, resulting in more evaporation and lower gas hydrogen temperature. Higher fill ratio of cryogenic liquid hydrogen led to a lower average fluid temperature in the tank.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Emmanuel Odella, Maxim Secor, Edgar A. Reyes Cruz, Walter D. Guerra, Maria N. Urrutia, Paul A. Liddell, Thomas A. Moore, Gary F. Moore, Sharon Hammes-Schiffer, Ana L. Moore
Summary: By substituting electron-withdrawing groups onto the benzimidazole-based bridge, the oxidation potential in proton-coupled electron transfer processes can be increased, enabling long-range proton translocation. This strategy of altering the driving force provides a new solution for oxidative processes, such as artificial photosynthesis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Thermodynamics
Mirae Kim, Heesue Jeong, Ahmad Ali Awais, Seungho Kim, Kyung Chun Kim
Summary: The thermal performance of a metal-foam heat exchanger in cryogenic environments was examined through an experiment and a CFD simulation. The results showed good agreement between the experimental data and CFD predictions, indicating that the metal-foam heat exchanger performed well in low-temperature conditions.
APPLIED THERMAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
David A. Hastman, Parth Chaturvedi, Eunkeu Oh, Joseph S. Melinger, Igor L. Medintz, Lela Vukovic, Sebastian A. Diaz
Summary: This study investigates the impact of local temperature changes on the dehybridization of double-stranded DNA. By varying the distance between DNA and nanoparticles as well as the energy fluence of laser pulses, the researchers achieve control over the dehybridization rate and release of DNA.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Matthew Chiriboga, Sebastian A. Diaz, Divita Mathur, David A. Hastman, Joseph S. Melinger, Remi Veneziano, Igor L. Medintz
Summary: Progress has been made using DNA to template J-aggregates, which exhibit interesting photonic properties and enhance exciton transfer. Linear contiguous J-aggregates can relay excitons up to 16.3 nm, however, nonlinear arrays show poor exciton transfer efficiency.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Public, Environmental & Occupational Health
Harapan Harapan, Samsul Anwar, Amanda Yufika, Khan Sharun, Mahir Gachabayov, Marhami Fahriani, Milda Husnah, Rawan Raad, Rashed Y. A. Abdalla, Rashed Y. Adam, Namareg M. E. Khiri, Mohajer I. H. Ismaeil, Asma Y. Ismail, Wajdi Kacem, Nesrine B. H. Dahman, Zeineb Teyeb, Khaoula Aloui, Montacer Hafsi, Manel Ferjani, Dalia A. Deeb, Dina Emad, Kirellos Said Abbas, Fatma A. Monib, Farah S. Sami, R. Subramaniam, Suhrud Panchawagh, Sunil Anandu, Md Ariful Haque, Lirane E. D. Ferreto, Maria F. C. Briones, Rocio B. Morales, Sebastian A. L. Diaz, Jose T. O. Aburto, Jorge E. T. Rojas, Emmanuel O. Balogun, Seyi S. Enitan, Akele R. Yomi, Abiodun Durosinmi, Eyiuche D. Ezigbo, Esther N. Adejumo, Elham Babadi, Edris Kakemam, Najma Malik, Irfan Ullah, Dott F. Rosiello, Talha B. Emran, Guilherme W. Wendt, Morteza Arab-Zozani, Abram L. Wagner, Mudatsir Mudatsir
Summary: The study aimed to determine the level of vaccine hesitancy in communities, finding that belief in vaccination benefits and concerns about new vaccines were still prevalent in 10 countries in Asia, Africa, and South America.
PATHOGENS AND GLOBAL HEALTH
(2022)
Article
Chemistry, Physical
Azhad U. Chowdhury, Sebastian A. Diaz, Jonathan S. Huff, Matthew S. Barclay, Matthew Chiriboga, Gregory A. Ellis, Divita Mathur, Lance K. Patten, Aaron Sup, Natalya Hallstrom, Paul D. Cunningham, Jeunghoon Lee, Paul H. Davis, Daniel B. Turner, Bernard Yurke, William B. Knowlton, Igor L. Medintz, Joseph S. Melinger, Ryan D. Pensack
Summary: By altering the spatial configuration of dyes on a DNA template, we can tune the energy transfer and quenching between molecular excitons. We find that heterodimers with different spatial configurations exhibit different optical properties, which is significant for various applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sebastian A. Diaz, Gissela Pascual, Lance K. Patten, Simon K. Roy, Adam Meares, Matthew Chiriboga, Kimihiro Susumu, William B. Knowlton, Paul D. Cunningham, Divita Mathur, Bernard Yurke, Igor L. Medintz, Jeunghoon Lee, Joseph S. Melinger
Summary: Understanding and controlling exciton coupling in dye aggregates is important for potential applications such as coherent exciton devices, nanophotonics, and biosensing. DNA nanostructure templates provide a powerful modular approach. In this study, Cy5-R dyes were used to examine the formation and properties of 30 unique DNA templated homodimers, revealing the role of sterics and hydrophobicity in determining the orientation and coupling strength of the dimers.
Article
Chemistry, Physical
Brian S. S. Rolczynski, Sebastian A. Diaz, Young C. C. Kim, Divita Mathur, William P. P. Klein, Igor L. L. Medintz, Joseph S. S. Melinger
Summary: This study uses structural DNA nanotechnology to investigate energy-transport mechanisms and interactions in a chromophore network. By introducing variations in a 14-Site chromophore network, machine-learning algorithms and spectroscopy measurements were used to determine the roles of each Site. Molecular dynamics simulations and energy-transport modeling were also performed to understand the physical significance of these patterns. The study provides insights into the understanding of each Site's role in an optoelectronic molecular network using machine-learning methods.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Analytical
Matthew Chiriboga, Christopher M. Green, Divita Mathur, David A. Hastman, Joseph S. Melinger, Remi Veneziano, Igor L. Medintz, Sebastian A. Diaz
Summary: Coherently coupled pseudoisocyanine (PIC) dye aggregates, formed through heterogeneous nucleation on DNA oligonucleotides, exhibit unique photophysical properties that differ from previously reported aggregates. This new type of aggregate, called the super aggregate (SA), displays peak narrowing and quantum yield variation in emission spectra, indicative of stronger coupling. Characterization with circular dichroism and atomic force microscopy further reveals unique features depending on the DNA substrate. By integrating an energy transfer acceptor, the SA demonstrates mixed energy transfer characteristics depending on the DNA's sequence and geometry. These findings suggest that DNA-based PIC aggregate properties can be controlled through simple modifications to the DNA substrate, informing rational design principles for future device prototyping.
METHODS AND APPLICATIONS IN FLUORESCENCE
(2023)
Article
Chemistry, Multidisciplinary
Peter E. Siegfried, Hari Bhandari, Jeanie Qi, Rojila Ghimire, Jayadeep Joshi, Zachary T. Messegee, Willie B. Beeson, Kai Liu, Madhav Prasad Ghimire, Yanliu Dang, Huairuo Zhang, Albert V. Davydov, Xiaoyan Tan, Patrick M. Vora, Igor I. Mazin, Nirmal J. Ghimire
Summary: By utilizing ab initio calculations and measurements of magnetic, thermal, and transport properties, it is demonstrated that orthorhombic CoTe2 is near ferromagnetism, which is suppressed by spin fluctuations. Calculations and transport measurements reveal the presence of nodal Dirac lines, making it a rare combination of proximity to quantum criticality and Dirac topology.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Joyce C. C. Breger, James N. N. Vranish, Eunkeu Oh, Michael H. H. Stewart, Kimihiro Susumu, Guillermo Lasarte-Aragone's, Gregory A. A. Ellis, Scott A. A. Walper, Sebastian A. Diaz, Shelby L. L. Hooe, William P. P. Klein, Meghna Thakur, Mario G. G. Ancona, Igor L. L. Medintz
Summary: Enzymes in multistep cascades can self-assemble with nanoparticles into nanoclusters, allowing for directed substrate transport and significant improvement in catalytic flux. Efficiency of the channeling can be enhanced by optimizing enzymatic stoichiometry, using two-dimensional nanoplatelets, and ordering the enzyme assembly. Detailed analyses confirm the formation of the assembly and clarify the structure-function properties, verifying the generalized applicability of these self-assembled biocatalytic nanoclusters.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
David A. Hastman, Eunkeu Oh, Joseph S. Melinger, Christopher M. Green, Aaron J. P. Thielemann, Igor L. Medintz, Sebastian A. Diaz
Summary: This study investigates the effect of plasmonic gold nanoparticle (AuNP) size on the rate of thermal release of single-stranded oligonucleotides under femtosecond (fs)-pulsed laser irradiation. Contrary to theoretical predictions, smaller AuNP diameters lead to faster DNA denaturation rates. Controlling for other factors yields the same result, suggesting that direct energy transfer may play a significant role as AuNPs decrease in size.
Proceedings Paper
Biochemical Research Methods
Christopher M. Green, Joseph Spangler, Kimihiro Susumu, David A. Stenger, Igor L. Medintz, Sebastian A. Diaz
Summary: Colloidal quantum dots are used for various applications due to their high luminosity and large surface areas for bioconjugation. We have developed a method to conjugate nucleic acids to quantum dots using chimeric peptide-PNA and characterized QD-FRET reporters for CRISPR/Cas nuclease assays. We identified factors that could limit the sensitivity of these reporters in practice.
COLLOIDAL NANOPARTICLES FOR BIOMEDICAL APPLICATIONS XVIII
(2023)
Review
Chemistry, Multidisciplinary
Divita Mathur, Sebastian A. Diaz, Niko Hildebrandt, Ryan D. Pensack, Bernard Yurke, Austin Biaggne, Lan Li, Joseph S. Melinger, Mario G. Ancona, William B. Knowlton, Igor L. Medintz
Summary: DNA nanotechnology enables the self-assembly of 3D nanoscale structures, with potential applications in various fields. These structures can be modified and used as optical substrates. Dynamic DNA structures have the ability to reconfigure and change their properties, allowing for multiple applications.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Scott Melis, Samantha Hung, Chaitali Bagade, Yuri Chung, Eleni Hughes, Xinran Zhang, Paola Barbara, Peize Han, Tingting Li, Daniel McCusker, Robert Hartsmith, Jeffery Bertke, Pratibha Dev, Iris Stone, Jaydeep Joshi, Patrick Vora, Edward Van Keuren
Summary: This study presents the optical and electronic characterization of the charge transfer cocrystal phenothiazine-tetracyanoquinodimethane (PTZ-TCNQ). The low energy CT states and changes in the Raman spectra are identified using density functional theory calculations. Long, ribbon-like oriented cocrystals are fabricated using an evaporative alignment method and fabricated into organic field effect transistors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Kevin Ye, Nathan Z. Koocher, Stephen Filippone, Shanyuan Niu, Boyang Zhao, Matthew Yeung, Sharon Bone, Adam J. Robinson, Patrick Vora, Andre Schleife, Long Ju, Alexey Boubnov, James M. Rondinelli, Jayakanth Ravichandran, R. Jaramillo
Summary: Chalcogenide perovskites and related layered structures have potential applications in optoelectronics and energy conversion technologies. However, experimental studies on these compounds are limited. In this study, experimental and theoretical methods are used to investigate the electronic structure and physical properties of chalcogenide perovskites, highlighting the role of covalent bonding in charge transport.