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Qi X, Balankura T, Zhou Y, Fichthorn KA. How Structure-Directing Agents Control Nanocrystal Shape: Polyvinylpyrrolidone-Mediated Growth of Ag Nanocubes. NANO LETTERS 2015; 15:7711-7717. [PMID: 26509492 DOI: 10.1021/acs.nanolett.5b04204] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The importance of structure-directing agents (SDAs) in the shape-selective synthesis of colloidal nanostructures has been well documented. However, the mechanisms by which SDAs actuate shape control are poorly understood. In the polyvinylpyrrolidone (PVP)-mediated growth of {100}-faceted Ag nanocrystals, this capability has been attributed to preferential binding of PVP to Ag(100). We use molecular dynamics simulations to probe the mechanisms by which Ag atoms add to Ag(100) and Ag(111) in ethylene glycol solution with PVP. We find that PVP induces kinetic Ag nanocrystal shapes by regulating the relative Ag fluxes to these facets. Stronger PVP binding to Ag(100) leads to a larger Ag flux to Ag(111) and cubic nanostructures through two mechanisms: enhanced Ag trapping by more extended PVP films on Ag(111) and a reduced free-energy barrier for Ag to cross lower-density films on Ag(111). These flux-regulating capabilities depend on PVP concentration and chain length, consistent with experiment.
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Affiliation(s)
- Xin Qi
- Department of Chemical Engineering and ‡Department of Physics, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Tonnam Balankura
- Department of Chemical Engineering and ‡Department of Physics, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Ya Zhou
- Department of Chemical Engineering and ‡Department of Physics, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Kristen A Fichthorn
- Department of Chemical Engineering and ‡Department of Physics, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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Davidson EC, Beckingham BS, Ho V, Segalman RA. Confined crystallization in lamellae forming poly(3-(2′-ethyl)hexylthiophene) (P3EHT) block copolymers. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23904] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Emily C. Davidson
- Department of Chemical Engineering; University of California; Santa Barbara California 93106
- Department of Chemical and Biomolecular Engineering; University of California; Berkeley California 94720
| | - Bryan S. Beckingham
- Materials Sciences Division; Lawrence Berkeley National Laboratory; Berkeley California 94720
| | - Victor Ho
- Department of Chemical and Biomolecular Engineering; University of California; Berkeley California 94720
- Materials Sciences Division; Lawrence Berkeley National Laboratory; Berkeley California 94720
| | - Rachel A. Segalman
- Department of Chemical Engineering; University of California; Santa Barbara California 93106
- Materials Department; University of California, Santa Barbara; Santa Barbara California 93106
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53
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Lee Y, Gomez ED. Challenges and Opportunities in the Development of Conjugated Block Copolymers for Photovoltaics. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00112] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Youngmin Lee
- Department of Chemical Engineering and ‡Materials Research
Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Enrique D. Gomez
- Department of Chemical Engineering and ‡Materials Research
Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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54
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Kuang H, Janik MJ, Gomez ED. Quantifying the role of interfacial width on intermolecular charge recombination in block copolymer photovoltaics. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23757] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hao Kuang
- Department of Chemical Engineering; The Pennsylvania State University; University Park Pennsylvania 16802
| | - Michael J. Janik
- Department of Chemical Engineering; The Pennsylvania State University; University Park Pennsylvania 16802
| | - Enrique D. Gomez
- Department of Chemical Engineering; The Pennsylvania State University; University Park Pennsylvania 16802
- Materials Research Institute; The Pennsylvania State University; University Park Pennsylvania 16802
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55
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Affiliation(s)
- Wenlin Zhang
- Department of Chemical Engineering and ‡Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Enrique D. Gomez
- Department of Chemical Engineering and ‡Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Scott T. Milner
- Department of Chemical Engineering and ‡Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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56
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Noguchi Y, Saeki A, Fujiwara T, Yamanaka S, Kumano M, Sakurai T, Matsuyama N, Nakano M, Hirao N, Ohishi Y, Seki S. Pressure Modulation of Backbone Conformation and Intermolecular Distance of Conjugated Polymers Toward Understanding the Dynamism of π-Figuration of their Conjugated System. J Phys Chem B 2015; 119:7219-30. [DOI: 10.1021/jp5100389] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuki Noguchi
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Akinori Saeki
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takenori Fujiwara
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Sho Yamanaka
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Masataka Kumano
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tsuneaki Sakurai
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naoto Matsuyama
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Motohiro Nakano
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naohisa Hirao
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yasuo Ohishi
- Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Shu Seki
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1
Yamadaoka, Suita, Osaka 565-0871, Japan
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