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Catalytic and Electron Conducting Carbon Nanotube-Reinforced Lysozyme Crystals

机译：催化和导电的碳纳米管增强溶菌酶晶体

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摘要

Novel reinforced cross-linked lysozyme crystals containing homogeneous dispersions of single-walled carbon nanotubes bundles (SWCNTs) are produced and characterized. The incorporation of SWCNTs inside lysozyme crystals gives rise to reinforced composite materials with tunable mechanical strength and electronic conductivity, while preserving the crystal quality and morphology. These reinforced crystals show increased catalytic activity at higher temperatures, being active even above the denaturation temperature. The electron transport through the crystals is linked to the content and distribution of SWCNT bundles inside the crystals. The electron conduction through the crystals is isotropic and very efficient, presenting high conductivity values up to 600 nS at very low (0.05 wt%) SWCNT concentration. To obtain these crystals, a new protocol based on the in situ crystallization of lysozyme in composite SWCNT-peptide hydrogels is developed. These peptide hydrogels are able to homogeneously disperse bundles of hydrophobic SWCNTs allowing first, the crystallization of the enzyme lysozyme and second, transferring the new properties of the inorganic component to the crystals. Taken together, these composite crystals represent an example of the versatility of proteins as biological substrates in the generation of novel functional materials, opening the door to use them in catalysis and bioelectronics at macroscale.
机译：产生并表征了包含单壁碳纳米管束（SWCNT）均匀分散体的新型增强型交联溶菌酶晶体。将SWCNT掺入溶菌酶晶体中可得到增强的复合材料，该复合材料具有可调节的机械强度和电子传导性，同时还能保持晶体的质量和形态。这些增强的晶体在较高的温度下显示出增加的催化活性，甚至在高于变性温度时仍具有活性。通过晶体的电子传输与晶体内部SWCNT束的含量和分布有关。通过晶体的电子传导是各向同性的，并且非常有效，在非常低的（0.05 wt％）SWCNT浓度下，电子传导率高达600 nS。为了获得这些晶体，开发了基于溶菌酶在复合SWCNT-肽水凝胶中原位结晶的新方案。这些肽水凝胶能够均匀分散疏水性SWCNT束，从而允许首先进行酶溶菌酶的结晶，其次将无机成分的新特性转移至晶体。综上所述，这些复合晶体代表了蛋白质作为生物底物在新型功能材料的产生中的多功能性的一个例子，这为在宏观上将其用于催化和生物电子学打开了大门。

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  • 来源
    《Advanced Functional Materials》 |2019年第5期|1807351.1-1807351.10|共10页
  • 作者

    Contreras-Montoya Rafael; Escolano Guillermo; Roy Subhasish; Lopez-Lopez Modesto T.; Delgado-Lopez Jose M.; Cuerva Juan M.; Diaz-Mochon Juan J.; Ashkenasy Nurit; Gavira Jose A.; Alvarez de Cienfuegos Luis;

  • 作者单位

    Univ Granada UGR, Fac Ciencias, Dept Quim Orggn, Avda Severo Ochoa S-N, E-18071 Granada, Spain;

    Univ Granada, CSIC, Lab Estudios Cristalog, Inst Anda Luz Ciencias Tierra, Ave Palmeras 4, Granada 18100, Spain;

    Ben Gurion Univ Negev, Dept Mat Engn, POB 653, IL-84105 Beer Sheva, Israel|BITS Pilani, Dept Chem, KK Birla Goa Campus,NH 17B,Bypass Rd, Sancoale 403726, Goa, India;

    UGR, Fac Ciencias, Dept Fis Aplicada, Avda Severo Ochoa S-N, E-18071 Granada, Spain;

    UGR, Fac Ciencias, Dept Quim Inorgan, Avda Severo Ochoa S-N, E-18071 Granada, Spain;

    Univ Granada UGR, Fac Ciencias, Dept Quim Orggn, Avda Severo Ochoa S-N, E-18071 Granada, Spain;

    Univ Granada, Fac Farm, Dept Quim Farmaceut & Organ,PTS Granada, Ctr Genom & Oncol Res Pfizer,UGR,Andalusian Reg G, Ave Ilustrac 114, Granada 18016, Spain;

    Ben Gurion Univ Negev, Dept Mat Engn, POB 653, IL-84105 Beer Sheva, Israel|Ben Gurion Univ Negev, Ilse Katz Inst Nanoscale Sci & Technol, POB 653, IL-84105 Beer Sheva, Israel;

    Univ Granada, CSIC, Lab Estudios Cristalog, Inst Anda Luz Ciencias Tierra, Ave Palmeras 4, Granada 18100, Spain;

    Univ Granada UGR, Fac Ciencias, Dept Quim Orggn, Avda Severo Ochoa S-N, E-18071 Granada, Spain;

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  • 正文语种 eng
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  • 关键词

    biomaterials; carbon nanotubes; composite materials; protein crystals; supramolecular hydrogels;

    机译：生物材料;碳纳米管;复合材料;蛋白质晶体;超分子水凝胶;

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