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Rehn SM, Gerrard-Anderson TM, Chen Y, Wang P, Robertson T, Senftle TP, Jones MR. Surface Ligands Dictate the Mechanical Properties of Inorganic Nanomaterials. ACS NANO 2023; 17:6698-6707. [PMID: 36971281 DOI: 10.1021/acsnano.2c12497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The ability for organic surface chemistry to influence the properties of inorganic nanomaterials is appreciated in some instances but is poorly understood in terms of mechanical behavior. Here we demonstrate that the global mechanical strength of a silver nanoplate can be modulated according to the local binding enthalpy of its surface ligands. A continuum-based core-shell model for nanoplate deformation shows that the interior of a particle retains bulk-like properties while the surface shell has yield strength values that depend on surface chemistry. Electron diffraction experiments reveal that, relative to the core, atoms at the nanoplate surface undergo lattice expansion and disordering directly related to the coordinating strength of the surface ligand. As a result, plastic deformation of the shell is more difficult, leading to an enhancement of the global mechanical strength of the plate. These results demonstrate a size-dependent coupling between chemistry and mechanics at the nanoscale.
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Dou J, Sun Z, Opalade AA, Wang N, Fu W, Tao F(F. Operando chemistry of catalyst surfaces during catalysis. Chem Soc Rev 2017; 46:2001-2027. [DOI: 10.1039/c6cs00931j] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The chemistry of a catalyst surface during catalysis is crucial for a fundamental understanding of the mechanisms of a catalytic reaction performed on the catalyst in the gas or liquid phase.
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Affiliation(s)
- Jian Dou
- Department of Chemical and Petroleum Engineering and Department of Chemistry
- University of Kansas
- Lawrence
- USA
| | - Zaicheng Sun
- Department of Chemistry and Chemical Engineering
- Beijing University of Technology
- Beijing
- China
| | - Adedamola A. Opalade
- Department of Chemical and Petroleum Engineering and Department of Chemistry
- University of Kansas
- Lawrence
- USA
| | - Nan Wang
- Department of Chemical and Petroleum Engineering and Department of Chemistry
- University of Kansas
- Lawrence
- USA
| | - Wensheng Fu
- Chongqing Key Laboratory of Green Synthesis and Applications and College of Chemistry
- Chongqing Normal University
- Chongqing
- China
| | - Franklin (Feng) Tao
- Department of Chemical and Petroleum Engineering and Department of Chemistry
- University of Kansas
- Lawrence
- USA
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Eren B, Zherebetskyy D, Patera LL, Wu CH, Bluhm H, Africh C, Wang LW, Somorjai GA, Salmeron M. Activation of Cu(111) surface by decomposition into nanoclusters driven by CO adsorption. Science 2016; 351:475-8. [PMID: 26823421 DOI: 10.1126/science.aad8868] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The (111) surface of copper (Cu), its most compact and lowest energy surface, became unstable when exposed to carbon monoxide (CO) gas. Scanning tunneling microscopy revealed that at room temperature in the pressure range 0.1 to 100 Torr, the surface decomposed into clusters decorated by CO molecules attached to edge atoms. Between 0.2 and a few Torr CO, the clusters became mobile in the scale of minutes. Density functional theory showed that the energy gain from CO binding to low-coordinated Cu atoms and the weakening of binding of Cu to neighboring atoms help drive this process. Particularly for softer metals, the optimal balance of these two effects occurs near reaction conditions. Cluster formation activated the surface for water dissociation, an important step in the water-gas shift reaction.
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Affiliation(s)
- Baran Eren
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - Danylo Zherebetskyy
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - Laerte L Patera
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA. CNR-IOM, Laboratorio TASC, Strada Statale 14, Km. 163.5, I-34149 Trieste, Italy. Physics Department and CENMAT, University of Trieste, via A. Valerio 2, I-34127 Trieste, Italy
| | - Cheng Hao Wu
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA. Department of Chemistry, University of California, Berkeley, CA, USA
| | - Hendrik Bluhm
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - Cristina Africh
- CNR-IOM, Laboratorio TASC, Strada Statale 14, Km. 163.5, I-34149 Trieste, Italy
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - Gabor A Somorjai
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA. Department of Chemistry, University of California, Berkeley, CA, USA
| | - Miquel Salmeron
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA. Department of Materials Science and Engineering, University of California, Berkeley, CA, USA.
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Anema JR, Li JF, Yang ZL, Ren B, Tian ZQ. Shell-isolated nanoparticle-enhanced Raman spectroscopy: expanding the versatility of surface-enhanced Raman scattering. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2011; 4:129-150. [PMID: 21370987 DOI: 10.1146/annurev.anchem.111808.073632] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a powerful technique for detection and characterization because of its extremely high sensitivity and the rich structural information that it can offer. However, most SERS substrates are composed of Au, Ag, or Cu, and a lack of substrate generality has greatly limited the breadth of the use of SERS. Recently, we have devised a method by which SERS can be obtained from virtually any surface. Au nanoparticles are coated with ultrathin silica shells. The Au core provides Raman signal enhancement; the silica shell prevents the core from coming into direct contact with probe/analyte molecules or the surface over which these particles are spread (i.e., prevents the contamination of the chemical system under study). In the present review, we expand upon previous discussion of the enhancement mechanism; procedures for the synthesis and characterization of our nanoparticles; and applications in surface chemistry, electrochemistry, and inspection.
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Affiliation(s)
- Jason R Anema
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Analytical Sciences and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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Nishida N, Yao H, Kimura K. Chiral functionalization of optically inactive monolayer-protected silver nanoclusters by chiral ligand-exchange reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2759-2766. [PMID: 18251563 DOI: 10.1021/la703351p] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report the ligand-exchange reaction between the optically inactive racemic penicillamine monolayer on a silver nanocluster surface and enantiopure D- or L-penicillamine dissolved in solution. Emergence of the identical band positions in the gel electrophoresis separation assures the presence of size-invariant silver nanoclusters (1.05 and 1.30 nm in core diameter) during the ligand-exchange reaction and allows us to further examine the optical/chiroptical properties of these nanoclusters. Consequently, chiral functionalization of the achiral silver nanoclusters has been demonstrated, yielding large Cotton effects in metal-based electronic transitions with an almost mirror-image relationship between the enantiomeric compounds. The ligand-exchange experiments as well as the normal syntheses of the silver nanoclusters revealed that their absorption profiles and anisotropy factors were strongly dependent on the enantiomeric purity (or enantiomeric excess) of surface chiral penicillamine, so that (several-fold) larger chiroptical responses of the silver nanoclusters as compared to those of the analogous gold clusters with a comparable size could be induced by the metal core deformation or rearrangement along with a universally influential vicinal contribution from the chiral ligand field.
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Affiliation(s)
- Naoki Nishida
- Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
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Miranda OR, Ahmadi TS. Effects of Intensity and Energy of CW UV Light on the Growth of Gold Nanorods. J Phys Chem B 2005; 109:15724-34. [PMID: 16852995 DOI: 10.1021/jp0514832] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Growth of gold nanorods (AuNRs) by photochemical reduction of HAuCl4 in a micelle solution of hexadecyltrimethylammonium bromide (CTAB) and tetraoctylammonium bromide (TOAB) is studied. The effects of 300 and 254 nm UV light sources and their photon flux on the anisotropic growth of gold nanoparticles are investigated by controlling duration of irradiation and the number of lamps within a photochemical reactor. The resulting AuNRs were characterized by absorption spectroscopy, FTIR, and TEM. Experimental results indicate that a higher density of longer colloidal AuNRs form by increasing the number of incident photons (lamps) at 300 nm while the 254 nm lights produce a lower yield of shorter AuNRs. The yield of AuNRs also depends on the duration of irradiation which was found to be 6.00 h for 300 nm and 5.00 h for 254 nm radiation. Acetone is found to play a major role in the synthesis of AuNRs. Two mechanisms are proposed for the synthesis of Au nanoparticles in the presence and absence of acetone. Irradiation of samples for an excess time produces a lower concentration of AuNRs and a higher yield of spherical particles. This effect is attributed to atom-by-atom dissolution of AuNRs into Au-spherical particles.
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Affiliation(s)
- Oscar R Miranda
- Department of Chemistry, Villanova University, Villanova, Pennsylvania 19085, USA
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