Формирование проводящих слоев на основе углеродных нанотрубок методом Ленгмюра

Методом изотерм сжатия и методом скачка потенциала исследованы ленгмюровские монослои, сформированные на основе индивидуальных растворов углеродных нанотрубок (УНТ) и их смесей с арахиновой кислотой (АК) в различных соотношениях. Эмпирически найдено оптимальное количество раствора УНТ (200 мкл) для формирования ленгмюровского слоя, который при переносе на твердую подложку имеет среднюю проводимость около 4.3⋅10^–12 См/кв. Обнаружено также, что при нанесении второго и последующих слоев проводимость пленки увеличивается более чем на 6 порядков (до 5,08⋅10^–6 См/кв). При исследовании смесей растворов углеродных нанотрубок (не имеющих амфифильных свойств) и арахиновой кислоты (типичного представителя поверхностно-активного вещества) найдено оптимальное соотношение объемов приготовленных растворов (УНТ : АК – 80 : 20), при котором возможен контроль степени сжатия слоя углеродных нанотрубок на поверхности жидкости. Показано, что введение в состав УНТ молекул АК позволяет дополнительно повысить проводимость пленки более чем на два порядка (до 1,18⋅10^–3 См/кв), по сравнению с пленками индивидуальных УНТ. Исследованные пленки могут быть использованы в качестве платформы для создания различных устройств микро- и наноэлектроники, оптоэлектроники, фотовольтаики, а также гибкой электроники.

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