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Hanson DE, Martin RL. Quantum chemistry and molecular dynamics studies of the entropic elasticity of localized molecular kinks in polyisoprene chains. J Chem Phys 2010; 133:084903. [DOI: 10.1063/1.3475522] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ward IM. The measurement of molecular orientation in polymers by spectroscopic techniques. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/polc.5070580103] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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de Vries AJ, Bonnebat C, Beautemps J. Uni- and biaxial orientation of polymer films and sheets. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/polc.5070580111] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kohale S, Molina SM, Weeks BL, Khare R, Hope-Weeks LJ. Monitoring the formation of self-assembled monolayers of alkanedithiols using a micromechanical cantilever sensor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:1258-63. [PMID: 17241042 DOI: 10.1021/la062441n] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Using a micromechanical cantilever device, the surface stress induced during the growth of alkanedithiol (HS(CH2)nSH) monolayers on gold in solution is continuously monitored and reported. Adsorption of alkanedithiols of varying chain lengths is observed and compared to each other, as well as to the adsorption of hydroxyalkanethiols (HS(CH2)nOH) and alkanethiols (HS(CH2)nCH3). The results have revealed a significant change in surface stress on the basis of the chain length of the alkanedithiol. The long-chain (n > 10) alkanedithiol adsorption imposes a tensile stress on the gold-coated surface of the cantilever rather than the compressive stress exhibited by both alkanethiols and short-chain dithiols. Our results suggest a phenomenon in which the two thiols of the alkanedithiol adsorb onto the gold surface forming a loop inducing a tensile stress on the cantilever for long chain lengths. This study shows that micromechanical cantilever sensors can be very valuable tools in the exploration and characterization of self-assembled monolayers.
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Affiliation(s)
- Swapnil Kohale
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
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Sun T, Zhang L, Chen J, Shen Y. Elastic behavior of short compact polymers. J Chem Phys 2004; 120:5469-75. [PMID: 15267421 DOI: 10.1063/1.1648011] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this paper, we investigate the elastic behaviors of short compact polymers using the enumeration calculation method and the HP model on a two-dimensional square lattice. Both the mean-square end-to-end distance R(2) and the ratio of R(2)/S(2) increase with lambda. However, when the elongation ratio becomes larger, the curves of R(2)/S(2) become smooth and they are close to the limit of 10.50 for different compact polymers. We also investigate the changes of interior conformations in the process of tensile elongation through calculating the probabilities of three bond angles (i.e., 90 degrees, 180 degrees, and 270 degrees). The average energy and Helmholtz free energy per bond are both negative and increase with elongation ratio lambda. In the meantime, the elastic force per bond (f ) also increases with elongation ratio lambda, and the energy contribution to the elastic force (f(U)) increases first and then drops, and there exists the maximum of f(U) in the region of lambda=1.40-1.80 for different sequences. The entropy contribution to force (f(S)) is close to zero at a small elongation ratio lambda and then increases with lambda. Some comparisons with different sequences (including nonfolding and folding sequences) are also made.
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Affiliation(s)
- Tingting Sun
- Department of Physics, Zhejiang University, Hangzhou, 310027, China
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Livadaru L, Kreuzer HJ. Statistical mechanics of an n-alkane chain in θ-condition: going beyond the RIS model. Phys Chem Chem Phys 2004. [DOI: 10.1039/b403087g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Livadaru L, Netz RR, Kreuzer HJ. Interacting chain model for poly(ethylene glycol) from first principles—stretching of a single molecule using the transfer matrix approach. J Chem Phys 2003. [DOI: 10.1063/1.1528913] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Titantah JT, Pierleoni C, Ryckaert JP. Single chain elasticity and thermoelasticity of polyethylene. J Chem Phys 2002. [DOI: 10.1063/1.1514974] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zhang LX, Jin J, Ye GX, Zhao DL. Elastic behavior of non-Gaussian polymethylene chains. Eur Polym J 2002. [DOI: 10.1016/s0014-3057(02)00097-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zhang L, Xia AG, Wang XH, Ye GX, Zhao DL. A molecular study on the reinforcement of polymethylene elastomers. Eur Polym J 2002. [DOI: 10.1016/s0014-3057(02)00084-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zhang LX, Jiang ZT, Zhao DL. Elastic behavior of bimodal poly(dimethylsiloxane) networks. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/polb.10074] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Schoukens G. Relationship between stress and orientation induced structures during uniaxial drawing of poly(ethylene 2,6-naphthalate). POLYMER 1999. [DOI: 10.1016/s0032-3861(98)00773-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Cifra P, Bleha T. Modeling of Stress−Strain Relations of Non-Gaussian Chains in Swollen Networks. Macromolecules 1998. [DOI: 10.1021/ma9700690] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter Cifra
- Polymer Institute, Slovak Academy of Sciences, 842 36 Bratislava, Slovak Republic
| | - Tomáš Bleha
- Polymer Institute, Slovak Academy of Sciences, 842 36 Bratislava, Slovak Republic
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Allegra G, Ganazzoli F, Bontempelli S. Good-and bad-solvent effect on the rotational statistics of a long chain molecule. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s1089-3156(98)00038-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Cifra P, Bleha T. Force–extension relations in macromolecules of variable excluded volume and flexibility: energy and entropy changes on stretching. ACTA ACUST UNITED AC 1995. [DOI: 10.1039/ft9959102465] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cifra P, Bleha T. Conformer populations and the excluded volume effect in lattice simulations of flexible chains in solutions. POLYMER 1993. [DOI: 10.1016/0032-3861(93)90059-j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lapersonne P, Bower D, Ward I. Molecular orientation and conformational changes due to uniaxial-planar deformation of poly(ethylene terephthalate) films. POLYMER 1992. [DOI: 10.1016/0032-3861(92)90774-q] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wu S. Control of intrinsic brittleness and toughness of polymers and blends by chemical structure: A review. POLYM INT 1992. [DOI: 10.1002/pi.4990290313] [Citation(s) in RCA: 159] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wu S. Chain structure, phase morphology, and toughness relationships in polymers and blends. POLYM ENG SCI 1990. [DOI: 10.1002/pen.760301302] [Citation(s) in RCA: 363] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Amram B, Bokobza L, Queslel J, Monnerie L. Fourier-transform infra-red dichroism study of molecular orientation in synthetic high cis-1,4-polyisoprene and in natural rubber. POLYMER 1986. [DOI: 10.1016/0032-3861(86)90298-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ward IM. The role of molecular networks and thermally activated processes in the deformation behavior of polymers. POLYM ENG SCI 1984. [DOI: 10.1002/pen.760241003] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Infra-red measurements on one-way drawn poly(ethylene terephthalalate) films subjected to constant strain. POLYMER 1980. [DOI: 10.1016/0032-3861(80)90167-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jasse B, Koenig JL. Orientational Measurements in Polymers Using Vibrational Spectroscopy. ACTA ACUST UNITED AC 1979. [DOI: 10.1080/00222357908080905] [Citation(s) in RCA: 117] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Smith FH, Work RN. Angular correlations in linear copolymers from the compositional dependence of their dipole moments. V. Solvent–polymer interactions. J Chem Phys 1978. [DOI: 10.1063/1.435663] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Maxfield J, Shepherd I. Effect of a non-uniform distribution of crosslinks on the analysis of Raman polarization data in stretched networks. POLYMER 1975. [DOI: 10.1016/0032-3861(75)90059-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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An infra-red spectroscopic study of molecular orientation and conformational changes in poly(ethylene terephthalate). POLYMER 1974. [DOI: 10.1016/0032-3861(74)90028-7] [Citation(s) in RCA: 137] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Maxfield J, Shepherd I. Investigation of molecular isomerism in polydimethylsiloxane by raman scattering. Chem Phys 1973. [DOI: 10.1016/0301-0104(73)80018-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Maxfield J, Shepherd I. Temperature and strain dependence of the raman depolarization in poly(dimethylsiloxane). Chem Phys Lett 1973. [DOI: 10.1016/0009-2614(73)85144-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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