Исследование структуры химически модифицированных образцов углеродных нанотруб методом спектроскопии оптического поглощения
Диссертация
Проведено исследование термического окисления образцов фторированных двустенных углеродных нанотруб методом спектроскопии оптического поглощения. Обнаружено, что удаление фтора из образца происходит начиная с 100 °C, полное разложение фторированных частиц заканчивается при ~500°С. Термическое дефторирование образца двустенных углеродных нанотруб практически не имеет воздействия на структуру… Читать ещё >
Содержание
- ВВЕДЕНИЕ.
- ГЛАВА 1. ЛИТЕРАТУРНЫЙ ОБЗОР
- 1. Электронная структура углеродных нанотруб
- 2. Методы синтеза углеродных нанотруб
- 2. 1. Элекгродуговое испарение графита
- 2. 2. Абляция графитовой мишени с помощью лазера
- 2. 3. Химическое осаждение из газовой фазы
- 2. 4. Газофазное разложение СО при высоком давлении
- 2. 5. Особенности синтеза двухстенных углеродных нанотруб
- 3. Методы характеризации углеродных нанотруб
- 3. 1. Оптическая спектроскопия поглощения
- 3. 2. Спектроскопия комбинационного рассеяния света
- 3. 3. Флуоресцентная спектроскопия
- 1. Физические основы оптической спектроскопии поглощения
- 2. Применение оптической спектроскопии поглощения для характеризации одностенных углеродных нанотруб
- 3. Детали эксперимента
- 3. 1. Методика подготовки образцов для измерения оптических спектров поглощения
- 3. 2. Регистрация и обработка спектров поглощения
- 4. Детали расчета
- 4. 1. Эмпирический метод «сильной связи»
- 4. 2. Параметризация эмпирического метода «сильной связи» под воспроизведение данных сканирующей туннельной спектроскопии
- 4. 3. Построение плотности электронных состояний и оптического спектра поглощения одностенной углеродной нанотрубы
- 4. 4. Выбор рядов углеродных нанотруб для расчета электронной структуры
- 1. Влияние концентрации катализатора на структуру электродуговых одностенных углеродных нанотруб
- 2. Влияние отжига на структуру образцов одностенных углеродных нанотруб, полученных методом HiPco
- 3. Фторированные углеродные нанотрубы
- 3. 1. Одностенные нанотрубы
- 3. 2. Двустенные нанотрубы
- 3. 2. 1. Влияние степени фторирования на структуру образцов двустенных нанотруб
- 3. 2. 2. Изменение структуры и состава образцов фторированных двустенных углеродных нанотруб в результате отжига
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