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Showing 1 to 12 of 69 entries
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Picoliter Drop-On-Demand Dispensing for Multiplex Liquid Cell Transmission Electron Microscopy.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

Patterson JP, Parent LR, Cantlon J, Eickhoff H, Bared G, Evans JE, Gianneschi NC.
PMID: 27135268
Microsc Microanal. 2016 Jun;22(3):507-14. doi: 10.1017/S1431927616000659. Epub 2016 May 03.

Liquid cell transmission electron microscopy (LCTEM) provides a unique insight into the dynamics of nanomaterials in solution. Controlling the addition of multiple solutions to the liquid cell remains a key hurdle in our ability to increase throughput and to...

Observing the growth of metal-organic frameworks by in situ liquid cell transmission electron microscopy.

Journal of the American Chemical Society

Patterson JP, Abellan P, Denny MS, Park C, Browning ND, Cohen SM, Evans JE, Gianneschi NC.
PMID: 26053504
J Am Chem Soc. 2015 Jun 17;137(23):7322-8. doi: 10.1021/jacs.5b00817. Epub 2015 Jun 08.

Liquid cell transmission electron microscopy (LCTEM) can provide direct observations of solution-phase nanoscale materials, and holds great promise as a tool for monitoring dynamic self-assembled nanomaterials. Control over particle behavior within the liquid cell, and under electron beam irradiation,...

Signal amplification and detection via a supramolecular allosteric catalyst.

Journal of the American Chemical Society

Gianneschi NC, Nguyen ST, Mirkin CA.
PMID: 15700991
J Am Chem Soc. 2005 Feb 16;127(6):1644-5. doi: 10.1021/ja0437306.

The design of a supramolecular allosteric catalyst system for catalytic signal amplification and detection is presented. The catalyst was switched "on" by the introduction of an analyte that also behaves as an allosteric activator. Concentrations of Cl- ions as...

Experimental and theoretical evidence for molecular forces driving surface segregation in photonic colloidal assemblies.

Science advances

Xiao M, Hu Z, Gartner TE, Yang X, Li W, Jayaraman A, Gianneschi NC, Shawkey MD, Dhinojwala A.
PMID: 31555734
Sci Adv. 2019 Sep 20;5(9):eaax1254. doi: 10.1126/sciadv.aax1254. eCollection 2019 Sep.

Surface segregation in binary colloidal mixtures offers a simple way to control both surface and bulk properties without affecting their bulk composition. Here, we combine experiments and coarse-grained molecular dynamics (CG-MD) simulations to delineate the effects of particle chemistry...

Interrogating Kinetic versus Thermodynamic Topologies of Metal-Organic Frameworks via Combined Transmission Electron Microscopy and X-ray Diffraction Analysis.

Journal of the American Chemical Society

Gong X, Noh H, Gianneschi NC, Farha OK.
PMID: 30929446
J Am Chem Soc. 2019 Apr 17;141(15):6146-6151. doi: 10.1021/jacs.9b01789. Epub 2019 Apr 03.

Synthetic protocols that preferentially result in metal-organic framework (MOF) crystallization of one topology over another remain an elusive, empirical process. This is primarily because of a lack of fundamental insights into MOF crystal growth and the effect of various...

Elucidating the Growth of Metal-Organic Nanotubes Combining Isoreticular Synthesis with Liquid-Cell Transmission Electron Microscopy.

Journal of the American Chemical Society

Vailonis KM, Gnanasekaran K, Powers XB, Gianneschi NC, Jenkins DM.
PMID: 31244172
J Am Chem Soc. 2019 Jul 03;141(26):10177-10182. doi: 10.1021/jacs.9b04586. Epub 2019 Jun 24.

Metal-organic nanotubes (MONTs) are tunable porous 1D materials that are envisioned to be complementary to carbon nanotubes for anisotropic applications. To date, characterization of MONTs relies on single crystal X-ray diffraction (SCXRD) to determine structure and composition. This requires...

Glycopolymer Microarrays with Sub-Femtomolar Avidity for Glycan Binding Proteins Prepared by Grafted-To/Grafted-From Photopolymerizations.

Angewandte Chemie (International ed. in English)

Valles DJ, Zholdassov YS, Korpanty J, Uddin S, Naeem Y, Mootoo DR, Gianneschi NC, Braunschweig AB.
PMID: 34273126
Angew Chem Int Ed Engl. 2021 Sep 06;60(37):20350-20357. doi: 10.1002/anie.202105729. Epub 2021 Aug 11.

We report a novel glycan array architecture that binds the mannose-specific glycan binding protein, concanavalin A (ConA), with sub-femtomolar avidity. A new radical photopolymerization developed specifically for this application combines the grafted-from thiol-(meth)acrylate polymerization with thiol-ene chemistry to graft...

Origin of Proteolytic Stability of Peptide-Brush Polymers as Globular Proteomimetics.

ACS central science

Sun H, Qiao B, Choi W, Hampu N, McCallum NC, Thompson MP, Oktawiec J, Weigand S, Ebrahim OM, de la Cruz MO, Gianneschi NC.
PMID: 34963898
ACS Cent Sci. 2021 Dec 22;7(12):2063-2072. doi: 10.1021/acscentsci.1c01149. Epub 2021 Dec 02.

Peptide-brush polymers (PBPs), wherein every side-chain of the polymers is peptidic, represent a new class of proteomimetic with unusually high proteolytic resistance while maintaining bioactivity. Here, we sought to determine the origin of this behavior and to assess its...

Phosphorescent Pt(ii) complexes spatially arrayed in micellar polymeric nanoparticles providing dual readout for multimodal imaging.

Chemical communications (Cambridge, England)

Proetto MT, Sanning J, Peterlechner M, Thunemann M, Stegemann L, Sadegh S, Devor A, Gianneschi NC, Strassert CA.
PMID: 30556084
Chem Commun (Camb). 2019 Jan 03;55(4):501-504. doi: 10.1039/c8cc06347h.

In this paper we report phosphorescent Pt(ii) complexes as monomers which can be directly incorporated into growing polymers. Due to the amphiphilic nature of the polymers they can self-assemble into micellar nanoparticles, where the phosphorescent Pt(ii) complexes can arrange...

Single Crystals of Electrically Conductive Two-Dimensional Metal-Organic Frameworks: Structural and Electrical Transport Properties.

ACS central science

Day RW, Bediako DK, Rezaee M, Parent LR, Skorupskii G, Arguilla MQ, Hendon CH, Stassen I, Gianneschi NC, Kim P, Dincă M.
PMID: 31893225
ACS Cent Sci. 2019 Dec 26;5(12):1959-1964. doi: 10.1021/acscentsci.9b01006. Epub 2019 Dec 10.

Crystalline, electrically conductive, and intrinsically porous materials are rare. Layered two-dimensional (2D) metal-organic frameworks (MOFs) break this trend. They are porous crystals that exhibit high electrical conductivity and are novel platforms for studying fundamentals of electricity and magnetism in...

Acid Exfoliation of Imine-linked Covalent Organic Frameworks Enables Solution Processing into Crystalline Thin Films.

Angewandte Chemie (International ed. in English)

Burke DW, Sun C, Castano I, Flanders NC, Evans AM, Vitaku E, McLeod DC, Lambeth RH, Chen LX, Gianneschi NC, Dichtel WR.
PMID: 31872540
Angew Chem Int Ed Engl. 2020 Mar 23;59(13):5165-5171. doi: 10.1002/anie.201913975. Epub 2020 Feb 12.

Covalent organic frameworks (COFs) are highly modular porous crystalline polymers that are of interest for applications such as charge-storage devices, nanofiltration membranes, and optoelectronic devices. COFs are typically synthesized as microcrystalline powders, which limits their performance in these applications,...

Chemical Control over Nucleation and Anisotropic Growth of Two-Dimensional Covalent Organic Frameworks.

ACS central science

Castano I, Evans AM, Li H, Vitaku E, Strauss MJ, Brédas JL, Gianneschi NC, Dichtel WR.
PMID: 31807691
ACS Cent Sci. 2019 Nov 27;5(11):1892-1899. doi: 10.1021/acscentsci.9b00944. Epub 2019 Nov 11.

Two-dimensional covalent organic frameworks (2D COFs) are composed of structurally precise, permanently porous, layered polymer sheets. 2D COFs have traditionally been synthesized as polycrystalline aggregates with small crystalline domains. Only recently have a small number of 2D COFs been...

Showing 1 to 12 of 69 entries